WorldWideScience

Sample records for baltic sea region

  1. Baltic Earth - Earth System Science for the Baltic Sea Region

    Science.gov (United States)

    Meier, Markus; Rutgersson, Anna; Lehmann, Andreas; Reckermann, Marcus

    2014-05-01

    The Baltic Sea region, defined as its river catchment basin, spans different climate and population zones, from a temperate, highly populated, industrialized south with intensive agriculture to a boreal, rural north. It encompasses most of the Scandinavian Peninsula in the west; most of Finland and parts of Russia, Belarus, and the Baltic states in the east; and Poland and small parts of Germany and Denmark in the south. The region represents an old cultural landscape, and the Baltic Sea itself is among the most studied sea areas of the world. Baltic Earth is the new Earth system research network for the Baltic Sea region. It is the successor to BALTEX, which was terminated in June 2013 after 20 years and two successful phases. Baltic Earth stands for the vision to achieve an improved Earth system understanding of the Baltic Sea region. This means that the research disciplines of BALTEX continue to be relevant, i.e. atmospheric and climate sciences, hydrology, oceanography and biogeochemistry, but a more holistic view of the Earth system encompassing processes in the atmosphere, on land and in the sea as well as in the anthroposphere shall gain in importance in Baltic Earth. Specific grand research challenges have been formulated, representing interdisciplinary research questions to be tackled in the coming years. A major means will be scientific assessments of particular research topics by expert groups, similar to the BACC approach, which shall help to identify knowledge gaps and develop research strategies. Preliminary grand challenges and topics for which Working Groups have been installed include: • Salinity dynamics in the Baltic Sea • Land-Sea biogeochemical feedbacks in the Baltic Sea region • Natural hazards and extreme events in the Baltic Sea region • Understanding sea level dynamics in the Baltic Sea • Understanding regional variability of water and energy exchange • Utility of Regional Climate Models • Assessment of Scenario Simulations

  2. Eastern Baltic Sea Region

    DEFF Research Database (Denmark)

    Jakobsen, Johnny Grandjean Gøgsig

    2016-01-01

    Kort over den østlige Østersøregion i middelalderen med angivelse af lokaliteter omtalt i antologien, placeret på s.8 i bogen "Church and Belief in the Middle Ages", red. Kirsi Salonen & Sari Katajala-Peltomaa (Amsterdam, 2016)....

  3. Migration waves to the Baltic Sea region.

    Science.gov (United States)

    Lappalainen, T; Laitinen, V; Salmela, E; Andersen, P; Huoponen, K; Savontaus, M-L; Lahermo, P

    2008-05-01

    In this study, the population history of the Baltic Sea region, known to be affected by a variety of migrations and genetic barriers, was analyzed using both mitochondrial DNA and Y-chromosomal data. Over 1200 samples from Finland, Sweden, Karelia, Estonia, Setoland, Latvia and Lithuania were genotyped for 18 Y-chromosomal biallelic polymorphisms and 9 STRs, in addition to analyzing 17 coding region polymorphisms and the HVS1 region from the mtDNA. It was shown that the populations surrounding the Baltic Sea are genetically similar, which suggests that it has been an important route not only for cultural transmission but also for population migration. However, many of the migrations affecting the area from Central Europe, the Volga-Ural region and from Slavic populations have had a quantitatively different impact on the populations, and, furthermore, the effects of genetic drift have increased the differences between populations especially in the north. The possible explanations for the high frequencies of several haplogroups with an origin in the Iberian refugia (H1, U5b, I1a) are also discussed.

  4. An Earth System Science Program for the Baltic Sea Region

    Science.gov (United States)

    Meier, H. E. M.; Rutgersson, A.; Reckermann, M.

    2014-04-01

    From Russia in the east to Sweden, Denmark, and Germany in the west, reaching south to the tips of the Czech Republic, Slovakia, and Ukraine, the Baltic Sea watershed drains nearly 20% of Europe (see Figure 1). In the highly populated south, the temperate climate hosts intensive agriculture and industry. In the north, the landscape is boreal and rural. In the Baltic Sea itself, complex bathymetry and stratification patterns as well as extended hypoxic and anoxic deep waters add to the diversity. Yet in recent history, the differences across the Baltic Sea region have been more than physical: In the mid-20th century, the watershed was split in two.

  5. Innovative economy in the Baltic Sea region

    Directory of Open Access Journals (Sweden)

    Mezhevich Nikolay

    2012-03-01

    Full Text Available Innovative activity is carried out at three levels — those of the state, region and a company or a university. This article considers the level of development of knowledge-based economy in Germany, Denmark, Sweden, Finland, Estonia, Latvia, Lithuania, and Poland at each of the three levels, as well as descripes the spatial differentiation of innovative activity within the Baltic region. The analysis is done on the basis of national and international research, as well as statistical data on the intensity of research and development, structure of research expenditure, human capital in the field of advanced technologies, and the methods of institutional support for innovative activity. The authors characterise the role of business, university, and authorities — which constitute the «triple helix» — in national innovative systems. The article also analyses such important factors as the intensity of research and development, the share of employees in the field of advanced technologies, and the methods of public support. Examples of private-public infrastructure for the implementation of innovative projects are offered.

  6. Regional cost-effectiveness in transboundary water quality management for the Baltic Sea

    DEFF Research Database (Denmark)

    Hasler, Berit; Smart, James Christopher Rudd; Fonnesbech-Wulff, Anders

    In 2007 HELCOM launched a plan for transboundary management of the Baltic Sea. This plan, called the Baltic Sea Action Plan (BSAP), aims amongst other things, to reduce eutrophication in the different regions of the Baltic Sea by reducing incoming nutrient loads from all discharging drainage basins...

  7. Use of bioenergy in the Baltic Sea region. Conference proceedings

    Energy Technology Data Exchange (ETDEWEB)

    Barz, M.; Ahlhaus, M. (eds.)

    2006-07-01

    The actual situation in our world can shortly be characterized by growing population and increasing energy demand, mainly covered by fossil fuels. This results in environmental as well as climate change problems. Renewable energies offer many opportunities to overcome these problems - they can provide heat and electricity as well as automotive fuels in environmentally friendly systems and thus contribute to lower the fossil fuels dependency. Biomass as the oldest renewable energy of mankind is still playing a dominant role as an energy carrier in some African and Asian regions, where biofuels are still used in traditional ways - mainly for cooking. On the other hand biomass has a huge potential to become a more important energy resource even in industrialized countries. All over the world the opportunities of biomass are accepted and biomass has become a common term in politics resulting in new strategic analyses, political documents, legislative actions and funding programs. A lot of modern and new high-tech solutions for bioenergy systems are already developed and others are under research. Aims of the actual developments are new bioenergy systems on the basis of regional biomass potentials in rural regions. The Baltic Sea Region offers a high potential to produce biofuels for different applications to fit the growing demand of heat, electricity and fuels. In combination with its industry and engineering skills the Baltic Sea Region is predestinated as a nucleus for further development and demonstration of advanced bioenergy solutions. In the result of the conference ''Contribution of Agriculture to Energy Production'', held in Tallinn, Estonia in October 2005 representatives from policy, economy and science identified a high potential and demand for bioenergy solutions and realized the necessity of establishment of an international network (Baltic Bioenergy Net - BaBEt) for information and know-how transfer between the Baltic States to foster

  8. Sustainable manure management in the Baltic Sea Region - results, cases and project recommendations

    DEFF Research Database (Denmark)

    Tybirk, Knud; Luostarinen, S; Hamelin, Lorie

    This magazine contains the major results, conclusions and recommendations of the project Baltic Forum for Innovative Technologies for Sustainable Manure Management (Baltic Manure) which via co-funding from Interreg Baltic Sea Region programme has been a Flagship project in the EU Strategy...

  9. Transborder corporate integration in the Baltic Sea Region

    Directory of Open Access Journals (Sweden)

    Kuznetsov Alexei

    2012-03-01

    Full Text Available The paper examines flows of foreign direct investment within the Baltic region. The author demonstrates close investment ties among the EU members, which are of special importance for Estonia, Latvia and Lithuania. Transborder corporate integration in the region is characterized by significant imbalances. In many aspects, it can be viewed as Sweden’s economic expansion or development of domestic markets for northern European companies. Although many German, Polish and Russian companies are involved in corporate integration in the Baltic region, other vectors of their foreign economic relations are still more important for them. As a result, the integration of Russian business in the Baltic part of the European integration area is still rather weak despite Russia’s considerable foreign direct investment in the Baltic States.

  10. Sea spray aerosol fluxes in the Baltic Sea region: Comparison of the WAM model with measurements

    Science.gov (United States)

    Markuszewski, Piotr; Kosecki, Szymon; Petelski, Tomasz

    2017-08-01

    Sea spray aerosol flux is an important element of sub-regional climate modeling. The majority of works related to this topic concentrate on open ocean research rather than on smaller, inland seas, e.g., the Baltic Sea. The Baltic Sea is one of the largest brackish inland seas by area, where major inflows of oceanic waters are rare. Furthermore, surface waves in the Baltic Sea have a relatively shorter lifespan in comparison with oceanic waves. Therefore, emission of sea spray aerosol may differ greatly from what is known from oceanic research and should be investigated. This article presents a comparison of sea spray aerosol measurements carried out on-board the s/y Oceania research ship with data calculated in accordance to the WAM model. The measurements were conducted in the southern region of the Baltic Sea during four scientific cruises. The gradient method was used to determinate aerosol fluxes. The fluxes were calculated for particles of diameter in range of 0.5-47 μm. The correlation between wind speed measured and simulated has a good agreement (correlation in range of 0.8). The comparison encompasses three different sea spray generation models. First, function proposed by Massel (2006) which is based only on wave parameters, such as significant wave height and peak frequency. Second, Callaghan (2013) which is based on Gong (2003) model (wind speed relation), and a thorough experimental analysis of whitecaps. Third, Petelski et al. (2014) which is based on in-situ gradient measurements with the function dependent on wind speed. The two first models which based on whitecaps analysis are insufficient. Moreover, the research shows strong relation between aerosol emission and wind speed history.

  11. Innovacionnyj process v regione Baltijskogo morja [The innovative process in the Baltic Sea region

    Directory of Open Access Journals (Sweden)

    Mäkinen Hanna

    2012-01-01

    Full Text Available In order to maintain its global competitiveness in the future, the Baltic Sea region (BSR needs to preserve and improve its technological capability and innovativeness. This article focuses on innovations in the Baltic Sea region, particularly on external innovation drivers and innovation environments in the BSR and individual countries within the region. Firstly, some definitions of innovations, innovation drivers, and characteristics of a favourable innovation environment are presented. Secondly, the current condition of innovation environments in the BSR is described and the innovation performances of Baltic countries are compared. Finally, the research aims to conclude, as well as to analyse, the future innovation development of the BSR. The research material for this desk study is collected from various sources, including journal articles, statistics, media, research reports, and other publications.

  12. Relationship between Economic Security and Country Risk Indicators in EU Baltic Sea Region Countries

    OpenAIRE

    Jelena STANKEVIČIENĖ; Tatjana SVIDERSKĖ; Algita Miečinskienė MIEČINSKIENĖ

    2013-01-01

    The globalization phenomenon raises new challenges in terms of country risk and economic security for small open economies. The objective of this paper is to evaluate the relationship between economic security and country risk indicators in EU Baltic Sea region countries. This paper, after surveying definitions and typologies of risks, proposes the analysis of the relationship between economic security and country risk in EU Baltic Sea region countries based on statistical data from 2012. ...

  13. Two centuries of extreme events over the Baltic Sea and North Sea regions

    Science.gov (United States)

    Stendel, Martin; den Besselaar Else, van; Abdel, Hannachi; Jaak, Jaagus; Elizabeth, Kent; Christiana, Lefebvre; Gudrun, Rosenhagen; Anna, Rutgersson; Frederik, Schenk; der Schrier Gerard, van; Tim, Woolings

    2017-04-01

    Two centuries of extreme events over the Baltic Sea and North Sea regions In the framework of the BACC 2 (for the Baltic Sea) and NOSCCA projects (for the North Sea region), studies of past and present variability and changes in atmospheric variables within the North Sea region over the instrumental period (roughly the past 200 years) have been investigated. Findings on trends in temperature and precipitation have already been presented. Here we focus on data homogeneity issues and examine how reliable reanalyses are in this context. Unlike most other regions in the world, there is a wealth of old observations available for the Baltic and North Sea regions, most of it in handwritten form in meteorological journals and other publications. These datasets need to be carefully digitised and homogenized. For this, a thorough quality control must be applied; otherwise the digitised datasets may prove useless or even counterproductive. We present evidence that this step cannot be conducted without human interference and thus cannot be fully automated. Furthermore, inhomogeneities due to e.g. instrumentation and station relocations need to be addressed. A wealth of reanalysis products is available, which can help detect such inhomogeneities in observed time series, but at the same time are prone to biases and/or spurious trends themselves e.g. introduced by changes in the availability and quality of the underlying assimilated data. It therefore in general remains unclear in how far we can simulate the pre-satellite era with respect to homogeneity with reanalyses based only on parts of the observing system. Extreme events and changes in extreme situations are more important and of greater (societal) significance than changes in mean climate. However, changes in extreme weather events are difficult to assess not only because they are, per definition, rare events, but also due to the homogeneity issues outlined above. Taking these into account, we present evidence for changes

  14. The genetic prehistory of the Baltic Sea region.

    Science.gov (United States)

    Mittnik, Alissa; Wang, Chuan-Chao; Pfrengle, Saskia; Daubaras, Mantas; Zariņa, Gunita; Hallgren, Fredrik; Allmäe, Raili; Khartanovich, Valery; Moiseyev, Vyacheslav; Tõrv, Mari; Furtwängler, Anja; Andrades Valtueña, Aida; Feldman, Michal; Economou, Christos; Oinonen, Markku; Vasks, Andrejs; Balanovska, Elena; Reich, David; Jankauskas, Rimantas; Haak, Wolfgang; Schiffels, Stephan; Krause, Johannes

    2018-01-30

    While the series of events that shaped the transition between foraging societies and food producers are well described for Central and Southern Europe, genetic evidence from Northern Europe surrounding the Baltic Sea is still sparse. Here, we report genome-wide DNA data from 38 ancient North Europeans ranging from ~9500 to 2200 years before present. Our analysis provides genetic evidence that hunter-gatherers settled Scandinavia via two routes. We reveal that the first Scandinavian farmers derive their ancestry from Anatolia 1000 years earlier than previously demonstrated. The range of Mesolithic Western hunter-gatherers extended to the east of the Baltic Sea, where these populations persisted without gene-flow from Central European farmers during the Early and Middle Neolithic. The arrival of steppe pastoralists in the Late Neolithic introduced a major shift in economy and mediated the spread of a new ancestry associated with the Corded Ware Complex in Northern Europe.

  15. Characterization of OMI tropospheric NO2 over the Baltic Sea region

    NARCIS (Netherlands)

    Ialongo, I.; Hakkarainen, J.; Hyttinen, N.; Jalkanen, J.P.; Johansson, L.; Boersma, K.F.; Krotkov, N.; Tamminen, J.

    2014-01-01

    Satellite-based data are very important for air-quality applications in the Baltic Sea region, because they provide information on air pollution over the sea and where ground-based and aircraft measurements are not available. Both the emissions from urban sites over land and ships over sea,

  16. Regional genetic differentiation in the blue mussel from the Baltic Sea area

    Science.gov (United States)

    Larsson, J.; Lind, E. E.; Corell, H.; Grahn, M.; Smolarz, K.; Lönn, M.

    2017-08-01

    Connectivity plays an important role in shaping the genetic structure and in evolution of local adaptation. In the marine environment barriers to gene flow are in most cases caused by gradients in environmental factors, ocean circulation and/or larval behavior. Despite the long pelagic larval stages, with high potential for dispersal many marine organisms have been shown to have a fine scale genetic structuring. In this study, by using a combination of high-resolution genetic markers, species hybridization data and biophysical modeling we can present a comprehensive picture of the evolutionary landscape for a keystone species in the Baltic Sea, the blue mussel. We identified distinct genetic differentiation between the West Coast, Baltic Proper and Bothnian Sea regions, with lower gene diversity in the Bothnian Sea. Oceanographic connectivity together with salinity and to some extent species identity provides explanations for the genetic differentiation between the West Coast and the Baltic Sea (Baltic Proper and Bothnian Sea). The genetic differentiation between the Baltic Proper and Bothnian Sea cannot be directly explained by oceanographic connectivity, species identity or salinity, while the lower connectivity to the Bothnian Sea may explain the lower gene diversity.

  17. Electric energy cooperation in the Baltic Sea region and the role of Russia in it

    Directory of Open Access Journals (Sweden)

    Zverev Yuri

    2013-06-01

    Full Text Available This article examines cooperation in the electric energy sector in the Baltic region. The author explores the existing undersea HVDC power exchange projects. It is emphasised that cooperation in the electric energy sector is concentrated largely in the EU member states despite earlier plans to establish the Baltic energy ring, which would also include Russia and Belarus. The author stresses that one of the most acute problems for the EU today is overcoming isolation of the energy systems of the Baltic States (Lithuania, Latvia, and Estonia from that of the major part of the EU. This task has become especially relevant after the closing of the Ignalina NPP (Lithuania, which used to be the primary energy source for the three Baltic States. The article examines key projects of the construction of new international power transmission lines in the framework of the Baltic Energy Market Interconnection Plan (BEMIP and the prospects of the Visaginas NPP (Lithuania in solving energy problems of the Baltic States. The author analyses Russia’s role in the electric energy market and focuses on a possible increase of the country’s energy market share following the construction of the Baltic NPP and the export of generated electric energy to Poland, Lithuania, Germany, and Sweden. The author concludes that the prospects of Russia’s energy export to the Baltic Sea region will be determined not only by technological, economic and market factors, but rather by the general state of relations between Russia and the EU. Moreover, a lot depends on Lithuania’s decision on the construction of the Visaginas NPP, as well as the way the EU and the Baltic States solve the problem of energy supply in case the NPP project is terminated.

  18. [Communication in the early modern Baltic Sea region = Kommunikatsioon varauusaegses Läänemereruumis] / Ulrike Plath

    Index Scriptorium Estoniae

    Plath, Ulrike, 1972-

    2011-01-01

    Arvustus: Communication in the early modern Baltic Sea region = Kommunikatsioon varauusaegses Läänemereruumis. Hrsg. von Enn Küng, Mati Laur, Kersti Lust. Ajalooline Ajakiri. The Estonian Historical Journal 2009. Nr. 3/4 (129/130). (Tartu 2010)

  19. Baltic Sea: Radionuclides

    DEFF Research Database (Denmark)

    Nielsen, Sven Poul; Lüning, Maria; Ilus, Erkki

    2011-01-01

    The most significant source of anthropogenic radioactivity in the Baltic Sea is fallout from the accident at the Chernobyl nuclear power plant in 1986. The second most important source is global fallout from atmospheric nuclear weapons tests carried out during the late 1950s and early 1960s....... Radioactivity inputs into the Baltic Sea from nuclear reprocessing plants in Western Europe have become of minor importance due to significant reduction of discharges in recent years. In terms of input of 137Cs into the Baltic Sea, Chernobyl fallout has contributed about 82% and nuclear weapons test fallout...... about 14%. For 90Sr in the Baltic Sea, input from atmospheric fallout from nuclear weapons tests has contributed about 81%, while the contribution from Chernobyl fallout was about 13%. Cesium-137 is the main indicator of Baltic seawater with respect to anthropogenic radioactivity. The highest...

  20. Baltic Sea: Radionuclides

    DEFF Research Database (Denmark)

    Nielsen, Sven Poul; Lüning, Maria; Ilus, Erkki

    2010-01-01

    The most significant source of anthropogenic radioactivity in the Baltic Sea is fallout from the accident at the Chernobyl nuclear power plant in 1986. The second most important source is global fallout from atmospheric nuclear weapons tests carried out during the late 1950s and early 1960s....... Radioactivity inputs into the Baltic Sea from nuclear reprocessing plants in Western Europe have become of minor importance due to significant reduction of discharges in recent years. In terms of input of 137Cs into the Baltic Sea, Chernobyl fallout has contributed about 82% and nuclear weapons test fallout...... about 14%. For 90Sr in the Baltic Sea, input from atmospheric fallout from nuclear weapons tests has contributed about 81%, while the contribution from Chernobyl fallout was about 13%. Cesium-137 is the main indicator of Baltic seawater with respect to anthropogenic radioactivity. The highest...

  1. BALTEX—an interdisciplinary research network for the Baltic Sea region

    International Nuclear Information System (INIS)

    Reckermann, Marcus; Langner, Joakim; Arheimer, Berit; Markus Meier, H E; Omstedt, Anders; Von Storch, Hans; Hünicke, Birgit; Keevallik, Sirje; Schneider, Bernd

    2011-01-01

    BALTEX is an environmental research network dealing with the Earth system of the entire Baltic Sea drainage basin. Important elements include the water and energy cycle, climate variability and change, water management and extreme events, and related impacts on biogeochemical cycles. BALTEX was founded in 1993 as a GEWEX continental-scale experiment and is currently in its second 10 yr phase. Phase I (1993–2002) was primarily dedicated to hydrological, meteorological and oceanographic processes in the Baltic Sea drainage basin, hence mostly dealt with the physical aspects of the system. Scientific focus was on the hydrological cycle and the exchange of energy between the atmosphere, the Baltic Sea and the surface of its catchment. The BALTEX study area was hydrologically defined as the Baltic Sea drainage basin. The second 10 yr phase of BALTEX (Phase II: 2003–12) has strengthened regional climate research, water management issues, biogeochemical cycles and overarching efforts to reach out to stakeholders and decision makers, as well as to foster communication and education. Achievements of BALTEX Phase II have been the establishment of an assessment report of regional climate change and its impacts on the Baltic Sea basin (from hydrological to biological and socio-economic), the further development of regional physical climate models and the integration of biogeochemical and ecosystem models. BALTEX features a strong infrastructure, with an international secretariat and a publication series, and organizes various workshops and conferences. This article gives an overview of the BALTEX programme, with an emphasis on Phase II, with some examples from BALTEX-related research.

  2. The prospects of nuclear power development in the eastern part of the Baltic Sea region as a factor of the formation of international relations system in the region

    OpenAIRE

    Mezhevich, Nikolai M.

    2013-01-01

    The current development of economic diplomacy in the world is determined by a combination of globalization and regionalization. In addition, it has an economic dimension. At the same time, the Baltic Sea region demonstrates large-scale politicisation of economic cooperation. The development of nuclear power in the eastern part of the Baltic Sea is indicative of the effectiveness of political and economic cooperation in the region. The author believes that Russia and the three Baltic States of...

  3. Innovations in the Baltic Sea Region and Network Cooperation between Russia and the EU

    Directory of Open Access Journals (Sweden)

    Fedorov Gennady

    2013-03-01

    Full Text Available Transnational (involving countries and cross-border (involving adjacent regions of different countries cooperation and integration are rapidly developing in the Baltic Sea region. Russia lags behind the Nordic countries and Germany as far as innovative development is concerned; yet our national pace here is comparable to that of Poland and the three Baltic States. At the same time, the features of innovative cooperation vary a great deal depending on the group of countries involved in cooperation processes. Independent of its type, however, international cooperation is beneficial for all parties concerned and should therefore be more actively encouraged. Northwestern Federal District traditionally plays a special role in the development of EU-Russia cooperation, since a number of its regions border on the EU countries. The district participates in the development of network innovative structures within the Baltic Sea region. It takes an active part in cross-border cooperation — activities that involve the formation of transborder innovative clusters. There are high expectations associated with the formation of such territorially localised innovative networks, as the Helsinki — Saint Petersburg — Tallinn and Tricity (Gdansk, Gdynia, Sopot — Kaliningrad — Klaipeda transborder innovative clusters. The city of Saint Petersburg and the adjacent Leningrad region, as well as the Kaliningrad region can become innovative development corridors between Russia and the EU and, eventually, develop into the ‘economic growth poles’ of the Russian Federation.

  4. Development and evaluation of a new regional coupled atmosphere–ocean model in the North Sea and Baltic Sea

    Directory of Open Access Journals (Sweden)

    Shiyu Wang

    2015-03-01

    Full Text Available A new regional coupled model system for the North Sea and the Baltic Sea is developed, which is composed of the regional setup of ocean model NEMO, the Rossby Centre regional climate model RCA4, the sea ice model LIM3 and the river routing model CaMa-Flood. The performance of this coupled model system is assessed using a simulation forced with ERA-Interim reanalysis data at the lateral boundaries during the period 1979–2010. Compared to observations, this coupled model system can realistically simulate the present climate. Since the active coupling area covers the North Sea and Baltic Sea only, the impact of the ocean on the atmosphere over Europe is small. However, we found some local, statistically significant impacts on surface parameters like 2 m air temperature and sea surface temperature (SST. A precipitation-SST correlation analysis indicates that both coupled and uncoupled models can reproduce the air–sea relationship reasonably well. However, the coupled simulation gives slightly better correlations even when all seasons are taken into account. The seasonal correlation analysis shows that the air–sea interaction has a strong seasonal dependence. Strongest discrepancies between the coupled and the uncoupled simulations occur during summer. Due to lack of air–sea interaction, in the Baltic Sea in the uncoupled atmosphere-standalone run the correlation between precipitation and SST is too small compared to observations, whereas the coupled run is more realistic. Further, the correlation analysis between heat flux components and SST tendency suggests that the coupled model has a stronger correlation. Our analyses show that this coupled model system is stable and suitable for different climate change studies.

  5. University–Industry Interaction Trends in the Baltic Sea Region: A Bibliometric Analysis

    Directory of Open Access Journals (Sweden)

    Murashova Elena

    2017-10-01

    Full Text Available The main objective of this study is to summarise and analyse the level of scientific interest from researchers from the Baltic Sea Region in interacting with each other on scientific and research projects in university–industry interaction field. This study will use bibliometric analysis based on actual joint initiatives and their published results. The growth of interest from both universities and industry in joint initiatives and changes in the nature of their cooperation (Butcher & Jeffren, 2005 has led to a significant increase in the Baltic Region and the number of scientific publications has doubled in the years 2010–2014. However, compared to the number of similar published studies from the United States, the United Kingdom, China and Japan, those results far outnumber the achievements of the Baltic regions. At the same time, there has been significant increase in the number of studies undertaken by Sweden, Germany and Finland in the period from 2012 to 2014, facilitated by active international and interdisciplinary cooperation and involvement in the research by a large number of authors. The results of the evaluation indicators through this bibliometric analysis can assist in the specific targeting and allocation of available finance and funding into promising fields of research and aid in communication and cooperation between stakeholders and interested organisations.

  6. A transnational and holistic breeding approach is needed for sustainable wheat production in the Baltic Sea region.

    Science.gov (United States)

    Chawade, Aakash; Armoniené, Rita; Berg, Gunilla; Brazauskas, Gintaras; Frostgård, Gunilla; Geleta, Mulatu; Gorash, Andrii; Henriksson, Tina; Himanen, Kristiina; Ingver, Anne; Johansson, Eva; Jørgensen, Lise Nistrup; Koppel, Mati; Koppel, Reine; Makela, Pirjo; Ortiz, Rodomiro; Podyma, Wieslaw; Roitsch, Thomas; Ronis, Antanas; Svensson, Jan T; Vallenback, Pernilla; Weih, Martin

    2018-03-14

    The Baltic Sea is one of the largest brackish water bodies in the world. Eutrophication is a major concern in the Baltic Sea due to the leakage of nutrients to the sea with agriculture being the primary source. Wheat (Triticum aestivum L.) is the most widely grown crop in the countries surrounding the Baltic Sea and thus promoting sustainable agriculture practices for wheat cultivation will have a major impact on reducing pollution in the Baltic Sea. This approach requires identifying and addressing key challenges for sustainable wheat production in the region. Implementing new technologies for climate-friendly breeding and digital farming across all surrounding countries should promote sustainable intensification of agriculture in the region. In this review, we highlight major challenges for wheat cultivation in the Baltic Sea region and discuss various solutions integrating transnational collaboration for pre-breeding and technology sharing to accelerate development of low input wheat cultivars with improved host plant resistance to pathogen and enhanced adaptability to the changing climate. © 2018 The Authors. Physiologia Plantarum published by John Wiley & Sons Ltd on behalf of Scandinavian Plant Physiology Society.

  7. Life Cycle Assessments of Manure Management Techniques for the Baltic Sea Regions

    DEFF Research Database (Denmark)

    Hamelin, Lorie; Baky, A; Cano-Bernal, J

    The report summarizes the key results of the consequential life cycle assessments (LCAs) carried out for a variety of manure management techniques over the Baltic Sea Regions (BSR). For all manure management technologies assessed, the environmental impacts (in terms of potential to global warming......, acidification of aquatic & terrestrial systems as well as phosphorus and nitrogen enrichment) are evaluated along the whole “manure management chain”, quantified and compared to the applying reference manure management system. The LCA results presented in this report cover 4 main manure types (dairy cow slurry...

  8. The Baltic Sea Macro-Regional Transport Cluster as an Element of the Silk Road Economic Belt

    Directory of Open Access Journals (Sweden)

    Nežerenko Olga

    2017-08-01

    Full Text Available This article analyzes the opportunities of the Chinese initiative “One Belt, One Road”, for the development of the Baltic Sea macro-region (BSR, as a single transport cluster. One of the objectives of the initiative is to strengthen transport linkages from the Pacific Ocean to the Baltic Sea Region. Thus, the contemporary macro-regional approach to the development of EU macro-regions can provide an additional impulse to the creation of formal macro-regional inter-cooperation, via in this case, the project that will advance the transport infrastructure of the region. This study examines the situation of the railway sector in the BSR in the period 2004–2015, through hierarchical cluster analysis, to identify countries with similar trends in cargo flow turnover. Taking into account the favorable geographical position of Poland, its transport performance and advanced (in comparison to other Baltic Sea region countries relations with China, it is concluded that Poland’s conditions are more suitable to promote economic integration with its closest neighbors – the Baltic countries-through the creation of formal macro-regional railway transport within the Rail Baltic project.

  9. Non-indigenous species in the North and Baltic Seas and the Great Lakes-St. Lawrence River region

    OpenAIRE

    Casties, Isabel; Seebens, Hanno; Briski, Elizabeta

    2016-01-01

    List of non-indigenous species (NIS) established in the Great Lakes-St. Lawrence River region and the North and Baltic Seas region, their geographic origin, and taxonomic assignment. Asterisks mark the NIS that occur in both the North and Baltic Seas and the Great Lakes-St. Lawrence River regions. GL, SL, NW, NE, SW and SE denote the Great Lakes, St. Lawrence River, north-west, north-east, south-west, and south-east, respectively. Eurasia represents inland freshwaters except Yangtze River, In...

  10. Effects of Regional Climate Change on the Wave Conditions in the Western Baltic Sea

    Science.gov (United States)

    Dreier, N.; Fröhle, P.

    2017-12-01

    The local wave climate in the Western Baltic Sea is mainly generated by the local wind field over the area. Long-term changes of the local wind conditions that are induced e.g. by regional climate change, directly affect the local wave climate and other local wind driven coastal processes like e.g. the longshore sediment transport. The changes of the local wave climate play an important role for the safe functional and structural design of new, or the adaption of existing, coastal protection structures as well as for the assessment of long-term morphological changes of the coastline. In this study, the wave model SWAN is used for the calculation of hourly wave conditions in the Western Baltic Sea between 1960 and 2100. Future wind conditions from two regional climate models (Cosmo-CLM and REMO) that have been forced by different future greenhouse gas emission scenarios used within AR4 (A1B, B1) and AR5 (RCP4.5 and RCP8.5) of IPCC are used as input for the wave model. The changes of the average wave conditions are analyzed from comparisons between the 30 years averages for the future (e.g. 2071-2100) and the reference period 1971-2000. Regarding the emission scenarios A1B and B1, a significant change of the 30 years averages of significant wave height at westerly wind exposed locations with predominant higher values up to +10% is found (cf. Fig. 1). In contrast, the change of the 30 years averages of significant wave height is more weak at easterly wind exposed locations, resulting in higher and lower values between -5% to +5%. Moreover, more wave events from W-NW and fewer events from N-NE can be expected, due to changes of the frequency of occurrence of the 30 years averages of mean wave direction. The changes of extreme wave heights are analyzed based on methods of extreme value analysis and the time series of wave parameters at selected locations nearby the German Baltic Sea coast. No robust changes of the significant wave heights with a return period of 200

  11. Sensitivity of modeled atmospheric nitrogen species and nitrogen deposition to variations in sea salt emissions in the North Sea and Baltic Sea regions

    Directory of Open Access Journals (Sweden)

    D. Neumann

    2016-03-01

    Full Text Available Coarse sea salt particles are emitted ubiquitously from the ocean surface by wave-breaking and bubble-bursting processes. These particles impact the atmospheric chemistry by affecting the condensation of gas-phase species and, thus, indirectly the nucleation of new fine particles, particularly in regions with significant air pollution. In this study, atmospheric particle concentrations are modeled for the North Sea and Baltic Sea regions in northwestern Europe using the Community Multiscale Air Quality (CMAQ modeling system and are compared to European Monitoring and Evaluation Programme (EMEP measurement data. The sea salt emission module is extended by a salinity-dependent scaling of the sea salt emissions because the salinity in large parts of the Baltic Sea is very low, which leads to considerably lower sea salt mass emissions compared to other oceanic regions. The resulting improvement in predicted sea salt concentrations is assessed. The contribution of surf zone emissions is considered separately. Additionally, the impacts of sea salt particles on atmospheric nitrate and ammonium concentrations and on nitrogen deposition are evaluated. The comparisons with observational data show that sea salt concentrations are commonly overestimated at coastal stations and partly underestimated farther inland. The introduced salinity scaling improves the predicted Baltic Sea sea salt concentrations considerably. The dates of measured peak concentrations are appropriately reproduced by the model. The impact of surf zone emissions is negligible in both seas. Nevertheless, they might be relevant because surf zone emissions were cut at an upper threshold in this study. Deactivating sea salt leads to minor increases in NH3 +  NH4+ and HNO3 +  NO3− and a decrease in NO3− concentrations. However, the overall effect on NH3 +  NH4+ and HNO3 +  NO3− concentrations is smaller than the deviation from the measurements. Nitrogen wet deposition is

  12. Modeling nutrient transports and exchanges of nutrients between shallow regions and the open Baltic sea in present and future climate.

    Science.gov (United States)

    Eilola, Kari; Rosell, Elin Almroth; Dieterich, Christian; Fransner, Filippa; Höglund, Anders; Meier, H E Markus

    2012-09-01

    We quantified horizontal transport patterns and the net exchange of nutrients between shallow regions and the open sea in the Baltic proper. A coupled biogeochemical-physical circulation model was used for transient simulations 1961-2100. The model was driven by regional downscaling of the IPCC climate change scenario A1B from two global General Circulation Models in combination with two nutrient load scenarios. Modeled nutrient transports followed mainly the large-scale internal water circulation and showed only small circulation changes in the future projections. The internal nutrient cycling and exchanges between shallow and deeper waters became intensified, and the internal removal of phosphorus became weaker in the warmer future climate. These effects counteracted the impact from nutrient load reductions according to the Baltic Sea Action Plan. The net effect of climate change and nutrient reductions was an increased net import of dissolved inorganic phosphorus to shallow areas in the Baltic proper.

  13. Re-visiting ICM theory and practice: Lessons learned from the Baltic Sea Region

    DEFF Research Database (Denmark)

    Støttrup, Josianne Gatt; Dinesen, Grete E.; Janssen, Holger

    2017-01-01

    SAF elements had been applied in practice within ICM processes. The results revealed the main ICM driver was ecology or economy. Several ICM elements as defined by the SAF are already standard within the Baltic Sea region. However, in many cases, the omission of stakeholder and institutional mapping...... as instructed by the SAF led to an unbalanced participation of stakeholders, or in some cases, lack of involvement of stakeholders at the start of the process. Most of the ICM processes failed to include an integrated, cross-sectorial, ecological-socio-economic assessment. This extends from the lack of system....../ or lack of manager experiences in conducting a stakeholder participatory process. Finally, due to its stringent structure the SAF was found to be a suitable quality assurance for sustainable ICM processes...

  14. Co-existence of electricity, TEP, and TGC markets in the Baltic Sea Region

    International Nuclear Information System (INIS)

    Hindsberger, Magnus; Nybroe, Malene Hein; Ravn, Hans F.; Schmidt, Rune

    2003-01-01

    This paper analyses the application of two policy instruments, tradable emission permits (TEPs) and tradable green certificates (TGCs) to the electricity sector in an international context. The paper contains an explicit modelling at two levels of abstraction, one suitable for defining and analysing basic functionalities and one suitable for numerical analysis in relation to countries in the Baltic Sea Region. Emphasis is on estimating implications in quantitative terms for countries in the Baltic Sea Region in 2010 when the TEP market in the analysis extends to four Nordic countries (Denmark, Finland, Norway, Sweden), and the TGC market extends to North European EU countries (Denmark, Finland, Sweden, Germany). The study concludes that within the range of goals stipulated in the EU draft directive (23.6% renewable energy) and the Kyoto targets for emissions, the following prices are affected significantly: from -2 to +10 Euro/MWh for electricity spot prices, TGC prices up to 50 Euro/MWh, TEP prices up to 18 Euro/t CO 2 and up to +15 Euro/MWh on the consumer cost. It is shown that such price changes have important consequences for the production and investment patterns in the electricity sector, and the resulting patterns will be clearly different according to the specific numerical targets for the two goals. An immediate consequence is increased pressure on transmission lines. Further, the introduction of TEP and TGC markets will imply a restructuring of the electricity sector, e.g. (depending on the specific combination of targets) by a significant increase in wind power capacities. However, this will have to be counterbalanced by access to production technologies that have fast regulation properties and/or that may maintain voltage stability. However, the price signals of TGCs (and to some extent also TEPs) that will enhance wind power investments will simultaneously hamper investments in technologies that are a precondition for extensive use of wind power

  15. Relationship between Eurasian large-scale patterns and regional climate variability over the Black and Baltic Seas

    Energy Technology Data Exchange (ETDEWEB)

    Stankunavicius, G.; Pupienis, D. [Vilnius Univ. (Lithuania). Dept. of Hydrology and Climatology; Basharin, D. [National Academy of Science of Ukraine, Sevastopol (Ukraine). Sevastopol Marine Hydrophysical Inst.

    2012-11-01

    Using a NCEP/NCAR Reanalysis dataset and the empirical orthogonal function (EOF) analysis approach we studied interannual to decadal variabilities of the sea-level air pressure (SLP) and the surface air temperature (SAT) fields over Eurasia during the 2nd part of the 20th century. Our results agree with those of the previous studies, which conclude that Eurasian trends are the result of storm-path changes driven by the interdecadal behaviour of the NAO-like meridional dipole pattern in the Atlantic. On interannual and decadal time scales, significant synchronous correlations between correspondent modes of SAT and SLP EOF patterns were found. This fact suggests that there is a strong and stable Eurasian interrelationship between SAT and SLP large-scale fields which affects the local climate of two sub-regions: the Black and Baltic Seas. The climate variability in these sub-regions was studied in terms of Eurasian large-scale surface-temperature and air-pressure patterns responses. We concluded that the sub-regional climate variability substantially differs over the Black and Baltic Seas, and depends on different Eurasian large-scale patterns. We showed that the Baltic Sea region is influenced by the patterns arising primary from NAO-like meridional dipole, as well as Scandinavian patterns, while the Black Sea's SAT/SLP variability is influenced mainly by the second mode EOF (eastern Atlantic) and large scale tropospheric wave structures. (orig.)

  16. Daily temperature and precipitation extremes in the Baltic Sea region derived from the BaltAn65+ reanalysis

    Science.gov (United States)

    Toll, Velle; Post, Piia

    2018-04-01

    Daily 2-m temperature and precipitation extremes in the Baltic Sea region for the time period of 1965-2005 is studied based on data from the BaltAn65 + high resolution atmospheric reanalysis. Moreover, the ability of regional reanalysis to capture extremes is analysed by comparing the reanalysis data to gridded observations. The shortcomings in the simulation of the minimum temperatures over the northern part of the region and in the simulation of the extreme precipitation over the Scandinavian mountains in the BaltAn65+ reanalysis data are detected and analysed. Temporal trends in the temperature and precipitation extremes in the Baltic Sea region, with the largest increases in temperature and precipitation in winter, are detected based on both gridded observations and the BaltAn65+ reanalysis data. However, the reanalysis is not able to capture all of the regional trends in the extremes in the observations due to the shortcomings in the simulation of the extremes.

  17. Status of biodiversity in the Baltic Sea.

    Science.gov (United States)

    Ojaveer, Henn; Jaanus, Andres; Mackenzie, Brian R; Martin, Georg; Olenin, Sergej; Radziejewska, Teresa; Telesh, Irena; Zettler, Michael L; Zaiko, Anastasija

    2010-09-01

    The brackish Baltic Sea hosts species of various origins and environmental tolerances. These immigrated to the sea 10,000 to 15,000 years ago or have been introduced to the area over the relatively recent history of the system. The Baltic Sea has only one known endemic species. While information on some abiotic parameters extends back as long as five centuries and first quantitative snapshot data on biota (on exploited fish populations) originate generally from the same time, international coordination of research began in the early twentieth century. Continuous, annual Baltic Sea-wide long-term datasets on several organism groups (plankton, benthos, fish) are generally available since the mid-1950s. Based on a variety of available data sources (published papers, reports, grey literature, unpublished data), the Baltic Sea, incl. Kattegat, hosts altogether at least 6,065 species, including at least 1,700 phytoplankton, 442 phytobenthos, at least 1,199 zooplankton, at least 569 meiozoobenthos, 1,476 macrozoobenthos, at least 380 vertebrate parasites, about 200 fish, 3 seal, and 83 bird species. In general, but not in all organism groups, high sub-regional total species richness is associated with elevated salinity. Although in comparison with fully marine areas the Baltic Sea supports fewer species, several facets of the system's diversity remain underexplored to this day, such as micro-organisms, foraminiferans, meiobenthos and parasites. In the future, climate change and its interactions with multiple anthropogenic forcings are likely to have major impacts on the Baltic biodiversity.

  18. Water quality management and climate change mitigation: cost-effectiveness of joint implementation in the Baltic Sea region

    DEFF Research Database (Denmark)

    Nainggolan, Doan; Hasler, Berit; Andersen, Hans Estrup

    2018-01-01

    of contrasting strategies: single environmental objective management versus joint implementation strategy. The results show that implementing land-based measures with a sole focus on water quality (to meet the HELCOM's 2013 Baltic Sea Action Plan nutrient abatement targets) can produce climate change mitigation......This paper explores the scope for simultaneously managing nutrient abatement and climate change mitigation in the Baltic Sea (BS) region through the implementation of a selection of measures. The analysis is undertaken using a cost-minimisation model for the entire BS region, the BALTCOST model...... co-benefits equivalent to 2.3% of the 2005 emission level (from agriculture and waste water combined) for the entirety of the BS region. More interestingly, a joint implementation strategy can deliver further climate change mitigation benefit (i.e. up to 5.4%) at a marginal cost that is comparable...

  19. [The Reception of Medieval Europa in the Baltic Sea Region. Papers of the XIIth Visby Symposium held at Gotland University, Visby] / Stefan Donecker

    Index Scriptorium Estoniae

    Donecker, Stefan, 1977-

    2011-01-01

    Arvustus : The Reception of Medieval Europa in the Baltic Sea Region. Papers of the XIIth Visby Symposium held at Gotland University, Visby. Viby : Gotland University Press, 2009. (Acta Visbyensia. 12)

  20. [The reception of medieval Europe in the Baltic Sea region, Papers of the XIIth Visby Symposium held at Gotland University, Visby] / Juhan Kreem

    Index Scriptorium Estoniae

    Kreem, Juhan, 1971-

    2011-01-01

    Arvustus: The reception of medieval Europe in the Baltic Sea Region : papers of the XIIth Visby Symposium, held at Gotland University, Visby / editor: Jörn Staecker. Visby : Gotland University Press, 2009. (Acta Visbyensia ; 12)

  1. Nuclear power in the Baltic Sea region: the history of emergence and the political and economic features of its development

    Directory of Open Access Journals (Sweden)

    Kretinin Gennady

    2013-06-01

    Full Text Available This article focuses on the development of peaceful nuclear power. The author draws attention to the fact that nuclear power is a rather young branch of national economy. However, over recent decades, it has already seen rises and falls, and a number of states have had tragic experiences of nuclear emergencies. Nevertheless, many countries — including the three Baltic States of Estonia, Latvia and Lithuania — express a strong interest in development, generation, and application of nuclear power. In the Baltic States, nuclear power dates back to the Soviet times, but its development was suspended pursuant to the EU regulations (the Ignalina NPP. Lithuania, Latvia, and Estonia have been striving for energy independence from Russia — the principal supplier of energy carriers to these countries. For a long time, the three Baltic States have been proclaiming their unanimity on the general European path of development. However, the reality proved to be different. The touchstone for achieving common goals was the idea of constructing a new NPP at the site of the closed Ignalina NPP. The author concludes that the joint construction of a new NPP is quite questionable. When it comes to politics, each of the three Baltic States is ready to build its own NPP. Thus, the development of nuclear power in the Baltic Sea region requires joint coordinated actions independent of any bloc-inspired interests of the states involved. Moreover, this success may prove sustainable if the actions are based on innovative decisions and modern technologies.

  2. The atmospheric boundary layer over land and sea: Focus on the off-shore Southern Baltic and Southern North Sea region

    DEFF Research Database (Denmark)

    Larsen, Søren Ejling

    Lecture notes for a short course on the ideal atmospheric boundary layer and its characteristics for different types of real boundary layers, aiming at a discussion of the coastal conditions at the Southern Baltic and North Sea region. The notes are aimed at young scientists (e.g. PhD students...

  3. Cold War and the environment: the role of Finland in international environmental politics in the Baltic Sea region.

    Science.gov (United States)

    Räsänen, Tuomas; Laakkonen, Simo

    2007-04-01

    The Convention on the Protection of the Marine Environment of the Baltic Sea Area signed in 1974 in Helsinki is probably the most important environmental agreement consummated in the Baltic Sea region. This article is the first study that explores the history of this agreement, also known as the Helsinki Convention, by using primary archival sources. The principal sources are the archives of the Ministry for Foreign Affairs of Finland. We examine the role of Finland in the process that led to the signing of the Helsinki Convention from the perspective of international politics. The study focuses primarily on Finnish, Swedish, and Soviet state-level parties from the end of the 1960s to 1974. We show that Cold War politics affected in several ways negotiations and contents of the Helsinki Convention. We also argue that the Soviet Union used the emerging international environmental issues as a new tool of power politics.

  4. Strategic Networking in the Technical HEI‘s of the Baltic Sea Region

    Directory of Open Access Journals (Sweden)

    Justas Nugaras

    2012-12-01

    Full Text Available This paper presents the results of the empirical research of the networking of Technical Higher Education Institutions (HEI‘S of the Baltic Sea region. The research was conducted in order to understand how the Social Network Analysis (SNA and network mapping methods could help to strengthen institution’s strategic perspective through networking. The author analyse the interaction phenomena in the Higher education sector; its’ impact for networking of institutions and for the network itself; the role of the position in the networks; abilities to strengthen the node’s perception of the network for the strategizing purposes. The research was based on the SNA of the Erasmus programme student mobility data. The results of the research cover the implications of aspects of the network centrality, clustering and ego networks let to identify the node’s position in the network, and to understand surrounding network. The research disclosed that the SNA could be applied in supporting the strategizing process by: increasing of understanding of embedded networks, having more realistic network picture, also could be used as supplement evaluation and development planning method for the relationships portfolio management for HEI’s.

  5. Jelektrojenergeticheskaja kooperacija v Baltijskom regione i rol' v nej Rossii [Electric energy cooperation in the Baltic Sea region and the role of Russia in it

    Directory of Open Access Journals (Sweden)

    Zverev Yuri

    2013-01-01

    Full Text Available This article examines cooperation in the electric energy sector in the Baltic region. The author explores the existing undersea HVDC power exchange projects. It is emphasised that cooperation in the electric energy sector is concentrated largely in the EU member states despite earlier plans to establish the Baltic energy ring, which would also include Russia and Belarus. The author stresses that one of the most acute problems for the EU today is overcoming isolation of the energy systems of the Baltic States (Lithuania, Latvia, and Estonia from that of the major part of the EU. This task has become especially relevant after the closing of the Ignalina NPP (Lithuania, which used to be the primary energy source for the three Baltic States. The article examines key projects of the construction of new international power transmission lines in the framework of the Baltic Energy Market Interconnection Plan (BEMIP and the prospects of the Visaginas NPP (Lithuania in solving energy problems of the Baltic States. The author analyses Russia’s role in the electric energy market and focuses on a possible increase of the country’s energy market share following the construction of the Baltic NPP and the export of generated electric energy to Poland, Lithuania, Germany, and Sweden. The author concludes that the prospects of Russia’s energy export to the Baltic Sea region will be determined not only by technological, economic and market factors, but rather by the general state of relations between Russia and the EU. Moreover, a lot depends on Lithuania’s decision on the construction of the Visaginas NPP, as well as the way the EU and the Baltic States solve the problem of energy supply in case the NPP project is terminated.

  6. Impact of marine mercury cycling on coastal atmospheric mercury concentrations in the North- and Baltic Sea region

    Directory of Open Access Journals (Sweden)

    Johannes Bieser

    2016-06-01

    Full Text Available Abstract The cycling of mercury between ocean and atmosphere is an important part of the global Hg cycle. Here we study the regional contribution of the air-sea exchange in the North- and Baltic Sea region. We use a newly developed coupled regional chemistry transport modeling (CTM system to determine the flux between atmosphere and ocean based on the meteorological model COSMO-CLM, the ocean-ecosystem model ECOSMO, the atmospheric CTM CMAQ and a newly developed module for mercury partitioning and speciation in the ocean (MECOSMO. The model was evaluated using atmospheric observations of gaseous elemental mercury (GEM, surface concentrations of dissolved gaseous mercury (DGM, and air-sea flux (ASF calculations based on observations made on seven cruises in the western and central Baltic Sea and three cruises in the North Sea performed between 1991 and 2006. It was shown that the model is in good agreement with observations: DGM (Normalized Mean Bias NMB=-0.27 N=413, ASF (NMB=-0.32, N=413, GEM (NMB=0.07, N=2359. Generally, the model was able to reproduce the seasonal DGM cycle with the best agreement during winter and autumn (NMBWinter=-0.26, NMBSpring=-0.41, NMBSummer=-0.29, NMBAutumn=-0.03. The modelled mercury evasion from the Baltic Sea ranged from 3400 to 4000 kg/a for the simulation period 1994–2007 which is on the lower end of previous estimates. Modelled atmospheric deposition, river inflow and air-sea exchange lead to an annual net Hg accumulation in the Baltic Sea of 500 to 1000 kg/a. For the North Sea the model calculates an annual mercury flux into the atmosphere between 5700 and 6000 kg/a. The mercury flux from the ocean influenced coastal atmospheric mercury concentrations. Running CMAQ coupled with the ocean model lead to better agreement with GEM observations. Directly at the coast GEM concentrations could be increased by up to 10% on annual average and observed peaks could be reproduced much better. At stations 100km downwind

  7. Emission Trading as a Basis for new Bioenergy Business Concepts in the Baltic Sea Region

    International Nuclear Information System (INIS)

    Vesterinen, Pirkko; Helynen, Satu

    2006-01-01

    The new EU Emission Trading system started in the beginning of 2005. This system will bring new challenges, but also new opportunities for the energy market in the Baltic Sea Region (BSR) countries. Typically in some EU countries the decreasing of greenhouse gas emissions tends to be more expensive to achieve than in the others. This brings about new trade schemes that could be implemented in the BSR. One important way of reducing emissions is to replace fossil fuels with biomass-based fuels in large scale power and steam production. As the availability of biomass, price level of biomass, electricity and steam, and national subsidies and taxation are different in different countries, it may be economically viable to create a framework for international trade. The product to be traded may be e.g. wood fuel (either as logs and chips or in refined form like pellets), energy (electricity), green certificates or emission allowances. It is also possible to implement so-called JI (Joint Implementation) projects to reach the emission reduction targets.All the above mentioned options may be realised in different ways. The purpose of the project is to find win-win opportunities, in which both the exporting and importing countries/regions will get profit from the system. These positive impacts may be quite impressive in regional level, as they directly boost several business areas like fuel production and transport, equipment manufacturing and maintenance, plant construction, as well as energy production and use. In addition, the impacts cover also forestry and agriculture, by bringing new value and utilisation options for their by-products.The paper presents the first results of an on-going project which is co-financed by the EU programme BSR INTERREG III B. The two-year project started in the beginning of 2005, and the main results will be available in autumn 2006

  8. Dvigateli regional'nogo stroitel'stva. Vlijanie regional'nyh politicheskih organizacij na sotrudnichestvo universitetov v regione Baltijskogo morja [Motors for regional development: impact on regional political organizations on the university cooperation in the Baltic Sea region

    Directory of Open Access Journals (Sweden)

    Ewert Stefan

    2010-01-01

    Full Text Available Educational co-operation is one of the main aspects of the regional political agenda in the Baltic Sea Region. The article analyzes the political impact of the organizations, as perceived by the universities in the region and political decision-makers on national and regional levels. Based on the success of the OECD in becoming an influential actor in educational policies, this article discusses different strategies for the regional political organizations to enhance their influence.

  9. Crustal structure and regional tectonics of SE Sweden and the Baltic Sea

    International Nuclear Information System (INIS)

    Milnes, A.G.; Gee, D.G.; Lund, C.E.

    1998-11-01

    In this desk study, the available geophysical and geological data on the crustal structure and regional tectonics of the wider surroundings of the Aespoe site (SE Sweden and adjacent parts of the Baltic Sea) are compiled and assessed. The aim is to contribute to the knowledge base for long-term rock mechanical modeling, using the Aespoe site as a proxy for a high-level radioactive waste repository site in Swedish bedrock. The geophysical data reviewed includes two new refraction/wide-angle reflection seismic experiments carried out within the EUROBRIDGE project, in addition to the numerous earlier refraction seismic profiles. The BABEL normal-incidence deep seismic profile is also considered. New geological data, presented at EUROBRIDGE workshops, and in recent SGU publications, are reviewed for the same area. In combination with the seismic data, these provide a base for interpreting the present composition and structure, and the Palaeoproterozoic-Mesoproterozoic evolution, of the crustal segment within which the Aespoe site lies - the Smaaland mega-block. This is characterized by having undergone little regionally significant deformation or magmatism since Neoproterozoic times (the last 1000 million years). It is shown that, at this scale of observation (of the order of 100 km), the long-term rheology of the lithosphere can be argued from a relatively tight observational network, when combined with the results of earlier SKB studies (seismo-tectonics, uplift patterns, state of stress, heat flow) and published research. Although many uncertainties exist, the present state of knowledge would suffice for first exploratory calculations and sensitivity studies of long-term, large-scale rock mechanics

  10. Modern Hanseatic Trends in the Baltic Region

    Directory of Open Access Journals (Sweden)

    Vasilyeva N. A.

    2017-06-01

    Full Text Available A critical analysis of Hanseatic traditions may produce consequential methodological material for the study of the 21st century Baltic regionalisation. Current trends in the development of the Baltic region, whose academic analysis is impossible without considering earlier cases of successful interactions between the peoples of the Baltic Sea region, necessitate political, economic, and historical research on the strengths and weaknesses of the Hanseatic League. Unfortunately, in the 21st century, the Baltic region turned into a stage for geopolitical controversies. This took a toll on the efficiency of cooperation between the cities of Russia’s North-West and their Baltic counterparts. Therefore, it is important to seize the opportunities provided by the information society and focus on the innovative areas of regional cooperation. An interesting example is the partnership between Baltic universities, which is aimed to draw up an international agenda for sustainable regional development. Baltic cities are involved in various forms of cross-border cooperation, providing opportunities for interstate relations and contributes to laying down crossborder cooperation roadmaps and developing civil society networks. It can be concluded, that the history of the Hanseatic League and its current incarnation — the New Hanse — testify to the fact that productive economic, cultural, and other relations can be established between states but also between cities and universities, thus contributing to closer economic, political and cultural ties between the peoples of the Baltic region.

  11. IODP expedition 347: Baltic Sea basin paleoenvironment and biosphere

    DEFF Research Database (Denmark)

    Andrén, T; Jørgensen, Bo Barker; Cotterill, Carol

    2015-01-01

    The Integrated Ocean Drilling Program (IODP) expedition 347 cored sediments from different set- tings of the Baltic Sea covering the last glacial–interglacial cycle. The main aim was to study the geological development of the Baltic Sea in relation to the extreme climate variability of the region...

  12. Changes in extreme sea levels in the Baltic Sea

    Science.gov (United States)

    Dieterich, Christian; Gröger, Matthias; Andersson, Helén; Nerheim, Signild; Jönsson, Anette

    2016-04-01

    A newly developed shallow water model for the Baltic Sea and North Sea is presented. The model is validated by means of a comparison with hindcast simulations with observational data sets. The aim of the development is to provide and apply a modelling tool to model extreme sea levels in the Baltic Sea, Kattegat and Skagerrak. The model approach will support the direct analysis of extreme sea level observations in the past and provide the possibility to extend the statistical data base by producing very long time series or very large ensembles of coastal sea levels. This effort is intended to contribute to an assessment of risks due to storm surges and coastal flooding in the 21st century along the coast of Sweden. By using different RCP climate scenarios downscaled with a regional, coupled climate model atmospheric forcing is available to project possible changes in extreme sea levels into the future. Projected sea level rise, changes in dynamical sea level in the North East Atlantic and tidal forcing in the northern North Sea are applied as boundary condition which allows to investigate their impact on the dynamics of regional sea level variability. Initial experiments focus on the impact of model resolution, resolution in the atmospheric forcing and the amount of details necessary in the bathymetry to faithfully model coastal sea level in the Baltic Sea and North Sea.

  13. Pollution in the Baltic Sea.

    Science.gov (United States)

    Rheinheimer, G

    1998-07-01

    The Baltic Sea is almost totally surrounded by land and therefore more endangered by pollution than other marine areas. The sources of marine pollution are municipal and industrial waste inputs directly into the sea or via rivers, and atmospheric inputs mainly from traffic and agriculture. The increase of inorganic plant nutrients (NH3, NOx, PO4) caused eutrophication and consequent oxygen depletion in coastal bottom waters as well as in the depths of the open sea. In the anoxic sediments, hydrogen sulfide can be produced by protein-decomposing and sulfate-reducing bacteria. The bottom fauna will be destroyed and only H2S tolerant microorganisms can survive. Originating from cellulose manufacturing and from paper mills, large amounts of poisonous chlorinated compounds contaminated the coastal waters of Sweden and Finland until the 1980s. Most of this material is still present in sediments of the central Baltic Sea and can be resuspended by near bottom currents. To reduce pollution and improve the situation in the Baltic Sea, the surrounding countries organized the Helsinki Convention, which came into force on 3.5.1980. The Helsinki Commission (HELCOM) founded in 1974 acts as coordinator and is responsible for the enforcement of the Baltic monitoring program and international research projects. The activities of HELCOM have led to the reduction of dangerous pollutants which in turn has caused the regeneration of flora and fauna in some areas. Further improvements can be expected.

  14. Governing a Common Sea. Environmental Policies in the Baltic Sea Region

    NARCIS (Netherlands)

    Joas, M.; Jahn, D.; Kern, K.

    2008-01-01

    How is a natural common pool resource such as a sea, which is shared by several countries, best governed? The potential for international conflict is immense, as each country may have different agendas with regard to issues such as exploitation and environmental protection. This book uses a case

  15. Regional distribution patterns of chemical parameters in surface sediments of the south-western Baltic Sea and their possible causes

    Science.gov (United States)

    Leipe, T.; Naumann, M.; Tauber, F.; Radtke, H.; Friedland, R.; Hiller, A.; Arz, H. W.

    2017-12-01

    This study presents selected results of a sediment geochemical mapping program of German territorial waters in the south-western Baltic Sea. The field work was conducted mainly during the early 2000s. Due to the strong variability of sediment types in the study area, it was decided to separate and analyse the fine fraction (TOC) and selected elements (P, Hg), the regional distribution maps show strong differences between the analysed fine fraction and the recalculated total sediment. Seeing that mud contents vary strongly between 0 and 100%, this can be explained by the well-known grain-size effect. To avoid (or at least minimise) this effect, further interpretations were based on the data for the fine fraction alone. Lateral transport from the large Oder River estuary combined with high abundances and activities of benthic fauna on the shallow-water Oder Bank (well sorted fine sand) could be some main causes for hotspots identified in the fine-fraction element distribution. The regional pattern of primary production as the main driver of nutrient element fixation (C, N, P, Si) was found to be only weakly correlated with, for example, the TOC distribution in the fine fraction. This implies that, besides surface sediment dynamics, local conditions (e.g. benthic secondary production) also have strong impacts. To the best of the authors' knowledge, there is no comparable study with geochemical analyses of the fine fraction of marine sediments to this extent (13,600 km2) and coverage (between 600 and 800 data points) in the Baltic Sea. This aspect proved pivotal in confidently pinpointing geochemical "anomalies" in surface sediments of the south-western Baltic Sea.

  16. The prospects of entrepreneurship in the formation of new hi-tech markets in the Baltic Sea region

    Directory of Open Access Journals (Sweden)

    Fidrya Yefim

    2012-12-01

    Full Text Available The article offers an analytical review of the prospects for the formation of new hi-tech markets in the Baltic Sea region with the participation of small and medium businesses. In view of the essential features of entrepreneurship, its prospects in the development and implementation of innovations seem to be quite attractive. However, in the current economic context, growth requires special measures. The authors analyse the measures taken by the European Union and individual countries in order to strengthen the participation of small and medium business in R&D and innovation, describe conditions which are necessary for unlocking innovative potential, identify new industries that might become drivers of innovative economy in Europe. The authors also offer a country-specific list of basic markets, which can be developed by small and medium enterprises in a short-term perspective. In the structure of the Baltic Sea region a special position is held by the Nordic countries — Sweden, Norway, Denmark, and Finland — major regional innovators, as well as a group of South-eastern regions that serve as innovation consumers. Best hopes rest with information and communications technologies and biotechnologies, which are expected to become the centre of major clusters of small and medium enterprises.

  17. Clubs within clubs: The Council of the Baltic Sea States (CBSS) and the Benelux as Macro-regions within the EU.

    NARCIS (Netherlands)

    Groenendijk, Nico; Muravska, Tatjana

    2011-01-01

    This paper deals with two examples of macro-regions in the EU: the Benelux and the Council of the Baltic Sea States (CBSS). Building on the distinction between “old” and “new” regionalism, it discusses some characteristics of regions in general, and of sub-integration schemes within the EU in

  18. Climate change in the Baltic sea region: a cross-country analysis of institutional stakeholder perceptions.

    Science.gov (United States)

    Piwowarczyk, Joanna; Hansson, Anders; Hjerpe, Mattias; Chubarenko, Boris; Karmanov, Konstantin

    2012-09-01

    Before climate change is considered in long-term coastal management, it is necessary to investigate how institutional stakeholders in coastal management conceptualize climate change, as their awareness will ultimately affect their actions. Using questionnaires in eight Baltic Sea riparian countries, this study examines environmental managers' awareness of climate change. Our results indicate that problems related to global warming are deemed secondary to short-term social and economic issues. Respondents agree that problems caused by global warming will become increasingly important, but pay little attention to adaptation and mitigation strategies. Current environmental problems are expected to continue to be urgent in the future. We conclude that an apparent gap exists between decision making, public concerns, and scientific consensus, resulting in a situation in which the latest evidence rarely influences commonly held opinions.

  19. Impact of a nitrogen emission control area (NECA) for ship traffic on the future air quality in the Baltic Sea region

    Science.gov (United States)

    Karl, Matthias; Geyer, Beate; Bieser, Johannes; Matthias, Volker; Quante, Markus; Jalkanen, Jukka-Pekka; Johansson, Lasse; Fridell, Erik

    2017-04-01

    Deposition of nitrogen compounds originating from shipping activities contribute to eutrophication of the Baltic Sea and coastal areas in the Baltic Sea region. Emissions of nitrogen oxides (NOx) from shipping on the Baltic Sea are comparable to the combined land-based emissions of NOx from Finland and Sweden and have been relatively stable over the last decade. However, expected future growth of maritime transport will result in higher fuel consumption and, if not compensated by increased transport efficiency or other measures, lead to higher total emissions of NOx from shipping. For the Baltic Sea a nitrogen emission control area (NECA) will become effective in 2021 - permitting only new built ships that are compliant with stringent Tier III emission limits - with the target of reducing NOx-emissions. In order to study the effect of implementing a Baltic Sea NECA-2021 on air quality and nitrogen deposition two future scenarios were designed; one with implementation of a NECA for the Baltic Sea starting in 2021 and another with no NECA implemented. The same increase of ship traffic was assumed for both future scenarios. Since complete fleet renewal with low NOx-emitting engines is not expected until 20-30 years after the NECA entry date, year 2040 was chosen as future scenario year. The Community Multiscale Air Quality (CMAQ) model was used to simulate the current and future air quality situation. The nested simulation runs with CMAQ were performed on a horizontal resolution of 4 km × 4 km for the entire Baltic Sea region. The meteorological year 2012 was chosen for the simulation of the current and future air quality situation since the 2m-temperature and precipitation anomalies of 2012 are closely aligned to the 2004-2014 decadal average over Baltic Proper. High-resolution meteorology obtained from COSMO-CLM was used for the regional simulations. Ship emissions were generated with the Ship Traffic Emission Assessment Model (STEAM) by the Finnish Meteorological

  20. The prospects of nuclear power development in the eastern part of the Baltic Sea region as a factor of the formation of international relations system in the region

    Directory of Open Access Journals (Sweden)

    Mezhevich Nikolai

    2013-05-01

    Full Text Available The current development of economic diplomacy in the world is determined by a combination of globalization and regionalization. In addition, it has an economic dimension. At the same time, the Baltic Sea region demonstrates large-scale politicisation of economic cooperation. The development of nuclear power in the eastern part of the Baltic Sea is indicative of the effectiveness of political and economic cooperation in the region. The author believes that Russia and the three Baltic States of Estonia, Latvia and Lithuania have the economic and technological opportunities for building up cooperation in the field of energy. This points to a question whether the traditional patterns of relations that developed among these countries in the past can be changed. A more pronounced international division of labour accompanied by the historically developed specialization of Russia makes nuclear power an important factor in Russia’s economic diplomacy. The promotion of Russian energy projects in the region contributes to the development of a system of mutually beneficial ties. The increasing energy deficiency in the region can serve an economic prerequisite to this process.

  1. Role of Air Cargo and Road Feeder Services for Regional Airports – Case Studies from the Baltic Sea Region

    Directory of Open Access Journals (Sweden)

    Beifert Anatoli

    2016-06-01

    Full Text Available Although airports play an important role the global and European economies, according to the new guidelines of the EU Commission on the new state aid rules for a competitive aviation industry (EC, 2014, it will be more difficult for unprofitable airports, to get financial public subsidies in the future. The Commission noted that the majority of regional airports experience severe problems to cover their operative costs, resulting from among other things from overlapping of airports’ catchment areas. The main objective of the above mentioned measures is not to close the regional airports, but to motivate them to operate on cost efficient, profitable and more flexible basis, stating however that and that the most inefficient airports will be still closed. In order face upcoming challenges, the regional airports shall reconsider their future development plans. Traditionally, the airports including small and regional airports focus on the passenger traffic and thus, the possible benefits and opportunities of the air cargo market are totally underestimated or even completely ignored. Most regional airports in the Baltic Sea region act totally isolated and do not have a clear picture of the current situation on the international air cargo market today, its future perspectives and sustainable development plans remain basically hidden. There are some examples when trying to meet the market demand, the regional airports have made huge, but unfortunately unjustified investments, e.g. improving airport infrastructure, runways, etc. However, the airports’ infrastructural investments alone cannot fulfil the expected “remedy” role for the airports’ sustainability. This paper aims at investigating the positioning and the role of the regional airports in the current hub-and-spoke network, focusing on the relevance and potential of the air cargo sector for the regional airports development. The optional freight value proposition for the development of

  2. Societal, land cover and climatic controls on river nutrient flows into the Baltic Sea

    NARCIS (Netherlands)

    Saaltink, Rémon; van der Velde, Ype; Dekker, Stefan C.; Lyon, Steve W.; Dahlke, Helen E.

    2014-01-01

    Study region: River basins draining into the Baltic Sea, known as the Baltic Sea Drainage Basin (BSDB). Study focus: Dramatic shifts in water quality have been observed in the Baltic Sea in past decades. This study investigated the spatial distribution of trends in nitrogen (N) and phosphorus (P) in

  3. Societal, land cover and climatic controls on river nutrient flows into the Baltic Sea

    NARCIS (Netherlands)

    Saaltink, R.; Velde, van der Y.; Dekker, S.C.; Lyon, S.W.; Dahlke, H.E.

    2014-01-01

    Study region River basins draining into the Baltic Sea, known as the Baltic Sea Drainage Basin (BSDB). Study focus Dramatic shifts in water quality have been observed in the Baltic Sea in past decades. This study investigated the spatial distribution of trends in nitrogen (N) and phosphorus (P) in

  4. Societal, land cover and climatic controls on river nutrient flows into the Baltic Sea

    NARCIS (Netherlands)

    Saaltink, Rémon; van der Velde, Ype; Dekker, Stefan; Lyon, Steve W.; Dahlke, Helen E.

    Study region River basins draining into the Baltic Sea, known as the Baltic Sea Drainage Basin (BSDB). Study focus Dramatic shifts in water quality have been observed in the Baltic Sea in past decades. This study investigated the spatial distribution of trends in nitrogen (N) and phosphorus (P) in

  5. Air Cargo Development in the Regional Airports of the Baltic Sea Region Through Road Feeder Services

    Directory of Open Access Journals (Sweden)

    Beifert Anatoli

    2015-06-01

    Full Text Available As issued in the Competition Policy Brief on the new state aid rules for a competitive aviation industry by the Competition Directorate-General of the European Commission in February 20141, it will be more difficult for unprofitable airports, to obtain financial public subsidies on EU, national or regional level. Although the positive impact of small airports on the regional development and general accessibility was mentioned, still the operating aid to the airports shall be cut out over a maximum of 10 years. It has been further stated that the vast majority of small and regional airports experience problems to cover their running operative costs, as a result from an intensive market competition and overlapping of airports’ catchment areas preventing even some promising airports from growth. Public subsidies are mostly used by the airport management for infrastructural investments, to cover operating losses or to attract price-sensitive airlines. Herewith, among other things, the EU Commission is pointing out at the lack of cooperation structures and network strategies among the regional airports and at rather isolated and individual approach during elaboration of the airport development scenarios. However, the Competition Policy Brief permits public aid to regional airports, among other things if there is sufficient transports need to establish transition periods for small airports; the need for more flexibility of the regional airports in the remote areas has been underlined. The EU Commission is expecting herewith not to close the regional airports, but to stimulate them to operate on cost efficient and profitable basis, and that only the most inefficient airports will be closed.

  6. The Costs of a Cleaner baltic Sea

    DEFF Research Database (Denmark)

    Brodersen, Sisse Liv; Konrad, Maria Theresia Hedegaard; Hasler, Berit

    2009-01-01

    of the results was nutrient reduction targets for each country - the BSAP targets. Because the Baltic Sea is such an international marine area, receiving pollutants from many  countries, an international approach is necessary to make effective solutions. But is the BSAP the most cost-effective solution...... to the regulation of the Baltic Sea? And does the BSAP result in cost-effective reductions in the different countries, which is a requirement of the Water Framework Directive and the Marine Strategy Directive?   These questions are studied and answered using a cost minimisation model for the Baltic sea, initially...... developed by Gren (2000) and, Schou et al 2006, now being under further development and extension within the Baltic Nest Institute in Roskilde. The model is a cost minimizing model for the reduction of nutrients to the Baltic comprising all countries around the Baltic sea. The purpose of this model...

  7. GHRSST Level 4 DMI_OI North Sea and Baltic Sea Regional Foundation Sea Surface Temperature Analysis (GDS version 1)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — A Group for High Resolution Sea Surface Temperature (GHRSST) Level 4 sea surface temperature analysis produced daily on an operational basis by the Danish...

  8. Nord Stream, Sweden and Baltic Sea Security

    International Nuclear Information System (INIS)

    Larsson, Robert L.

    2007-03-01

    In June 2006, FOI published the report: Sweden and the NEGP: a Pilot Study of the North European Gas Pipeline and Sweden's Dependence on Russian Energy, a base data report on a topic that FOI considered to be of rising importance. Much has happened since then and the NEGP has changed its name to Nord Stream and submitted an official notification on the intention of realising the project of constructing a gas pipeline from Russia to Germany via the Baltic Sea. The primary aim of this report is to discuss and analyse some of the core aspects of Nord Stream and the pipeline project with regard to the security situation for the Baltic Sea region. The report constitutes an updated version of the previous report. Most of the old report still stands valid, especially concerning the historical survey of Russia's energy policy, but the new report has additional chapters and is broader in scope concerning the consequences of the project

  9. Perspektivy razvitija atomnoj jenergetiki v vostochnoj chasti Baltijskogo morja kak faktor formirovanija sistemy mezhdunarodnyh otnoshenij v regione [The prospects of nuclear power development in the eastern part of the Baltic Sea region as a factor of the formation of international relations system in the region

    OpenAIRE

    Mezhevich Nikolay

    2013-01-01

    The current development of economic diplomacy in the world is determined by a combination of globalization and regionalization. In addition, it has an economic dimension. At the same time, the Baltic Sea region demonstrates large-scale politicisation of economic cooperation. The development of nuclear power in the eastern part of the Baltic Sea is indicative of the effectiveness of political and economic cooperation in the region. The author believes that Russia and the three Baltic States of...

  10. The geology of the southeastern Baltic Sea: a review

    Science.gov (United States)

    Ūsaitytė, Daiva

    2000-06-01

    The Baltic Sea, particularly its southeastern part, is discussed in the paper. Investigations of regional character as well as specialized studies in the area are reviewed. General historical works are mentioned briefly. Previous surveys since the 1950s are presented by the subject studied. The compilation of geological structure of the SE Baltic Sea bottom and adjacent land of Balticum (Baltic States: Estonia, Latvia, Lithuania) is based on considerable amounts of summarized materials. The crystalline basement, sedimentary cover and Quaternary deposits are characterized in the comprehensive survey of geological structure. From a stratigraphical point of view, geological sequence of the platformal cover is comparatively complete: deposits of all geological systems (from the Archean to Cenozoic) are present in the Baltic Syneclise. Considering geotectonical cycles, the sedimentary cover of the syneclise is subdivided into four structural complexes. The thickness and distribution of Quaternary deposits are closely related to the recent bottom relief of the Baltic Sea that in turn is inherited from the Pre-Quaternary surface. Buried palaeo-valleys are characteristic of the Pre-Quaternary surface in the Baltic region and the Baltic Sea bottom. The Quaternary is characterized by layers of various geneses and by sharp changes of their thicknesses.

  11. Scaling the Baltic Sea environment

    DEFF Research Database (Denmark)

    Larsen, Henrik Gutzon

    2008-01-01

    The Baltic Sea environment has since the early 1970s passed through several phases of spatial objectification in which the ostensibly well-defined semi-enclosed sea has been framed and reframed as a geographical object for intergovernmental environmental politics. Based on a historical analysis......-scientific logic, but should rather be seen as temporal outcomes of scale framing processes, processes that are accentuated by contemporary conceptions of the environment (or nature) in terms of multi-scalar ecosystems. This has implications for how an environmental concern is perceived and politically addressed....... of this development, this article suggests that environmental politics critically depend on the delineation of relatively bounded spaces that identify and situate particular environmental concerns as spatial objects for politics. These spaces are not simply determined by ‘nature' or some environmental...

  12. Environmental economics and the Baltic region

    International Nuclear Information System (INIS)

    Birk Mortensen, J.

    1994-03-01

    This volume originates from a workshop on Economics of the Environment held at the Institute of Economics, Copenhagen University, November 14-15, 1990 with participants from Lithuania, Estonia, Poland, Finland, Sweden and Denmark. The volume contains the papers presented at the workshop. In all the countries around the Baltic Sea there has been an increasing understainding of the importance of using the economic incentive approach to reach environmental goals. By changing the incentives an individual producer or consumer faces, the best private choice can be made to coincide with the best social choice. All the countries around the Baltic Sea have used direct regulation or command and control in environment regulation. Growing concern about environmental degradation, dissatisfaction with the command and control approach and the need to extend environmental regulation to sectors with a large number of small producers or consumers have increased attention to economic instruments in environmental policy. The Baltic sea is an almost coherent ecological system and there is a growing interest in addressing common environmental problems among the countries around the Baltic Sea. The recent political development offer new possibilites for cooperation in environmental policy. This is important because many environmental problems in the region require solutions involving several countries. (EG)

  13. Billionaires and Millionaires of the Baltic Sea Region: A Comparative Analysis of National Business Elites

    Directory of Open Access Journals (Sweden)

    Rakhmanov A. B.

    2017-12-01

    Full Text Available Local business elites make a major contribution to the development of the Baltic region’s countries, shaping their present and future. The Baltic business elites are an integral part of the transnational capitalist class — a product of the global economy and the global division of labour. Drawing on a sizeable body of statistics, the author conducts a comparative analysis of the Baltic states’ financial elites. The author considers such characteristics of business elites as their number, total wealth, gender composition, average number of children in their families, geographical distribution, global mobility, industry specialization, a tendency towards oligarchy, and others. Germany’s business elites are strong and are characterized by considerable wealth, a large number of billionaires and millionaires, strong roots in the German society, a high level of female representation, a relatively even geographical distribution, engagement in industrial production and technology, and a weak tendency towards oligarchy. Yet, Germany has a small proportion of self-made and talented business people. The strong points of Russia’s business elite are considerable wealth, relatively young age, and a high proportion of self-made and talented business people. Russia’s business elite is limited in number, has weak roots in the society, a low level of female representation, its hyper-co

  14. Nuclear installations in the baltic sea region and the stake holders cooperation: a crucial step towards energy security, environmental sustainability and political stability in the region

    Energy Technology Data Exchange (ETDEWEB)

    Zakaria, M.; Mandere, N.; Olsson, L. [Lund Univ., Centre for Sustainability Studies (LUCSUS) (Sweden)

    2006-07-01

    Radiation hazards are trans-boundary. The prevention of accidents must be managed locally. But the awareness, preparedness, and the responsibilities in the case of emergencies must be managed at the local and regional level, and must rely on close interaction between the local and regional levels. The Baltic Sea Region contains over 40 nuclear reactors contributing to energy security, but also posing a potential threat to human, environmental, and political security. The aim of this paper is to integrate the four fields of security: health, environment, energy, and political by analysing awareness, preparedness responsibility and decision making related to nuclear installations. With increasing political, economical, cultural and physical (in term of energy infrastructure) integration, the region needs to take a comprehensive approach to create adequate structure for managing risks and thereby promote security. (authors)

  15. Nuclear installations in the baltic sea region and the stake holders cooperation: a crucial step towards energy security, environmental sustainability and political stability in the region

    International Nuclear Information System (INIS)

    Zakaria, M.; Mandere, N.; Olsson, L.

    2006-01-01

    Radiation hazards are trans-boundary. The prevention of accidents must be managed locally. But the awareness, preparedness, and the responsibilities in the case of emergencies must be managed at the local and regional level, and must rely on close interaction between the local and regional levels. The Baltic Sea Region contains over 40 nuclear reactors contributing to energy security, but also posing a potential threat to human, environmental, and political security. The aim of this paper is to integrate the four fields of security: health, environment, energy, and political by analysing awareness, preparedness responsibility and decision making related to nuclear installations. With increasing political, economical, cultural and physical (in term of energy infrastructure) integration, the region needs to take a comprehensive approach to create adequate structure for managing risks and thereby promote security. (authors)

  16. The direct radiative effect of wildfire smoke on a severe thunderstorm event in the Baltic Sea region

    Science.gov (United States)

    Toll, V.; Männik, A.

    2015-03-01

    On August 8, 2010, a severe derecho type thunderstorm in the Baltic Sea region coincided with smoke from wildfires in Russia. Remarkable smoke aerosol concentrations, with a maximum aerosol optical depth of more than 2 at 550 nm, were observed near the thunderstorm. The impact of the wildfire smoke on the thunderstorm through direct radiative effects was investigated using the Hirlam Aladin Research for Mesoscale Operational Numerical Weather Prediction in Euromed (HARMONIE) model. HARMONIE was successfully able to resolve the dynamics of the thunderstorm, and simulations that considered the influence of the smoke-related aerosols were compared to simulation without aerosols. As simulated by the HARMONIE model, the smoke reduced the shortwave radiation flux at the surface by as much as 300 W/m2 and decreased the near-surface temperature by as much as 3 °C in the vicinity of the thunderstorm and respectively 100 W/m2 and 1 °C in the thunderstorm region. Atmospheric instability decreased through the direct radiative effect of aerosols, and several dynamic features of the simulated thunderstorm appeared slightly weaker.

  17. On the representation of regional characteristics by hydrographic measurements at central stations in four deep basins of the Baltic Sea

    Directory of Open Access Journals (Sweden)

    J. H. Reissmann

    2006-01-01

    Full Text Available In this work the eddy resolving data sets of salinity, temperature, and oxygen content aquired in the framework of the German-Russian project MESODYN (MESOscale DYNamics in the Arkona Basin, the Bornholm Basin, the Stolpe Furrow, and the Eastern Gotland Basin during summer and winter stratification situations are utilized to examine to which extent the observations at the central monitoring stations within these basins are representative for the spatial mean state of the corresponding region with respect to comparative monitoring purposes of the whole Baltic Sea. The investigation covers profiles of salinity, potential temperature, oxygen content, potential density, and squared buoyancy or Brunt-Väisälä frequency. Moreover, some parameters of the halocline, namely its depth, thickness, and upper and lower boundaries, and the first baroclinic Rossby radii are subject to the investigation. The profiles match best for the squared buoyancy or Brunt-Väisälä frequency. The profiles of salinity match best in the Eastern Gotland Basin and worst in the Arkona Basin both for summer and winter stratification situations. The overall agreement for the halocline parameters is good. The baroclinic Rossby radii match their spatial mean values well, if the depth range considered for their calculation is restricted to the mean depth in each region at the bottom side. In doing so they also match the spatial mean values of the first baroclinic Rossby radii calculated considering the whole depth range at each station. Overall, the regional characteristics of the investigated quantities and parameters are represented well by the hydrographic measurements at the central stations in the four regions in spite of some significant differences between the spatial mean states and the observations at the central stations. In particular, the observations at the central stations seem to be usefull for comparisons between these regions. However, the observed differences

  18. Energy policy strategies of the Baltic Sea Region for the post-Kyoto period - focusing on electricity and district heating generation

    Energy Technology Data Exchange (ETDEWEB)

    2012-05-15

    This study presents a comprehensive analysis of energy policy strategies for the Baltic Sea Region for the post-Kyoto period. To this aim, the study provides scenarios for the region in order to develop a both secure and climate-compatible energy system for the year 2020 and beyond. The long-term development of the energy systems in the Baltic Sea Region is analysed, i.e. in Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Norway, Poland, Sweden, and the north western part of Russia. The study focuses on the electricity and district heating sectors. The Baltic Sea Region is comprised of countries with very different economies and characteristics. Hydropower is an important source of electricity generation in Norway, Sweden, Finland and Latvia. Biomass resources are significant throughout the region, deriving from both agricultural residues and large forested areas. Wind power already contributes considerably to electricity generation in countries such as Denmark and Germany, and is likely to play a much greater role in the region in the years to come, both onshore and offshore. In the longer term (2030 and beyond), solar power and geothermal energy could also provide notable contributions to the overall energy supply. The study shows that it is technically possible to reduce greenhouse gas emissions in the electricity and district heating sectors of the Baltic Sea Region by close to 100% using mainly renewable energy sources. The results indicate that this is a challenging, but manageable task. The associated costs are moderate and can be further decreased through regional cooperation. Once the various production technologies have the possibility to interact with district heating and flexible electricity consumption, and transmission connections are optimally utilised, it becomes realistic to integrate e.g. large volumes of wind power into the energy system as a whole. Furthermore, the hydro power reservoirs, particularly in Norway, play a key role in

  19. Perspektivy setevogo sotrudnichestva Rossii i stran ES v innovacionnoj sfere na Baltike [Innovations in the Baltic Sea Region and Network Cooperation between Russia and the EU

    Directory of Open Access Journals (Sweden)

    Fedorov Gennady

    2013-01-01

    Full Text Available Transnational (involving countries and cross-border (involving adjacent regions of different countries cooperation and integration are rapidly developing in the Baltic Sea region. Russia lags behind the Nordic countries and Germany as far as innovative development is concerned; yet our national pace here is comparable to that of Poland and the three Baltic States. At the same time, the features of innovative cooperation vary a great deal depending on the group of countries involved in cooperation processes. Independent of its type, however, international cooperation is beneficial for all parties concerned and should therefore be more actively encouraged. Northwestern Federal District traditionally plays a special role in the development of EU-Russia cooperation, since a number of its regions border on the EU countries. The district participates in the development of network innovative structures within the Baltic Sea region. It takes an active part in cross-border cooperation — activities that involve the formation of transborder innovative clusters. There are high expectations associated with the formation of such territorially localised innovative networks, as the Helsinki — Saint Petersburg — Tallinn and Tricity (Gdansk, Gdynia, Sopot — Kaliningrad — Klaipeda transborder innovative clusters. The city of Saint Petersburg and the adjacent Leningrad region, as well as the Kaliningrad region can become innovative development corridors between Russia and the EU and, eventually, develop into the ‘economic growth poles’ of the Russian Federation.

  20. Absolute sea levels and isostatic changes of the eastern North Sea to central Baltic region during the last 900 years

    DEFF Research Database (Denmark)

    Hansen, Jens Morten; Aagaard, Troels; Binderup, Merete

    2012-01-01

    that ice-cap growth can be faster than ice-cap melting. By comparison with 29 long-term tide gauge measurements of the region we show that the isostatic implications of the sea-level curve are in nearly perfect agreement with Peltier's global isostatic VM2 model (applied by IPCC and PSMSL) and yield a 3...

  1. St. Canute Lavard around the Baltic Sea

    DEFF Research Database (Denmark)

    Petersen, Nils Holger

    2018-01-01

    This chapter discusses the Baltic Sea-area manifestations of the cult of the Danish Royal saint, Canute the Duke, in Danish, Knud Lavard, during the Middle Ages. It also applies theories of cultural memory by Jan and Aleida Assmann in order to approach an understanding of how the cult of St. Canute...... was culturally re-functionalized in Denmark in the sixteenth century, but not in any similar way in other areas around the Baltic Sea....

  2. Fifth Baltic Sea pollution load compilation (PLC-5)

    Energy Technology Data Exchange (ETDEWEB)

    Knuuttila, S.; Svendsen, L.M.; Staaf, H.; Kotilainen, P.; Boutrup, S.; Pyhala, M.; Durkin, M.

    2011-07-01

    This report includes the main results from the Fifth Pollution Load Compilation abbreviated PLC-5. It includes quantified annual waterborne total loads (from rivers, unmonitored and coastal areas as well as direct point and diffuse sources discharging directly to the Baltic Sea) from 1994 to 2008 to provide a basis for evaluating any decreasing (or increasing) trends in the total waterborne inputs to the Baltic Sea. Chapter 1 contains the objectives of PLC and the framework on classification of inputs and sources. Chapter 2 includes a short description of the Baltic Sea catchment area, while the methods for quantification and analysis together with quality assurance topics are briefly introduced in Chapter 3. More detailed information on methodologies is presented in the PLC-5 guidelines (HELCOM 2006). Chapter 4 reports the total inputs to the Baltic Sea of nutrients and selected heavy metals. Furthermore, the results of the quatification of discharges and losses of nitrogen and phosphorus from point and diffuse sources into inland surface waters within the Baltic Sea catchment area (source-oriented approach or gross loads) as well as the total load to the maritime area (load-oriented approarch or net loads) in 2006 are shown. Typically, results are presented by country and by main Baltic Sea sub-region. In Chapter 5, flow normalization is introduced and the results of trend analyses on 1994-2008 time series data on total waterborne loads of nitrogen and phosphorus are given together with a first evaluation of progress in obtaining the provisional reduction targets by country and by main Baltic Sea sub-region. Chapter 6 includes discussion of some of the main conclusions and advice for future PLCs. The annexes contain the flow-normalized annual load data and figures and tables with results from the PLC-5.

  3. Quality assessment of atmospheric surface fields over the Baltic Sea from an ensemble of regional climate model simulations with respect to ocean dynamics

    Directory of Open Access Journals (Sweden)

    H. E. Markus Meier

    2011-05-01

    Full Text Available Climate model results for the Baltic Sea region from an ensemble of eight simulations using the Rossby Centre Atmosphere model version 3 (RCA3 driven with lateral boundary data from global climate models (GCMs are compared with results from a downscaled ERA40 simulation and gridded observations from 1980-2006. The results showed that data from RCA3 scenario simulations should not be used as forcing for Baltic Sea models in climate change impact studies because biases of the control climate significantly affect the simulated changes of future projections. For instance, biases of the sea ice cover in RCA3 in the present climate affect the sensitivity of the model's response to changing climate due to the ice-albedo feedback. From the large ensemble of available RCA3 scenario simulations two GCMs with good performance in downscaling experiments during the control period 1980-2006 were selected. In this study, only the quality of atmospheric surface fields over the Baltic Sea was chosen as a selection criterion. For the greenhouse gas emission scenario A1B two transient simulations for 1961-2100 driven by these two GCMs were performed using the regional, fully coupled atmosphere-ice-ocean model RCAO. It was shown that RCAO has the potential to improve the results in downscaling experiments driven by GCMs considerably, because sea surface temperatures and sea ice concentrations are calculated more realistically with RCAO than when RCA3 has been forced with surface boundary data from GCMs. For instance, the seasonal 2 m air temperature cycle is closer to observations in RCAO than in RCA3 downscaling simulations. However, the parameterizations of air-sea fluxes in RCAO need to be improved.

  4. The Direct Trade of Woods for the Spanish Shipbuilding Industry and other Goods from the Southern Baltic Sea Region, 1700-1783

    Directory of Open Access Journals (Sweden)

    Rafal Reichert

    2016-04-01

    Full Text Available The present work is the first approach to theme of the direct trade between the southern region of the Baltic Sea and Spain, the issue very little known and generalizes by Spanish historiography. Thus, for help of the digital records of the Sound Strait, the checkpoint where ships paid a right of transit it to the Danish Crown, was conducted an analysis of the maritime movement and its volume between both regions in the period of 1700-1783. The results of this research were deepened with the employ of the Polish, Spanish and European historiographies that allowed establishing new perspectives of the commerce life of both regions (Spain and countries of the South Baltic. The primary focus of study focused on the presentation of economic, geopolitical and maritime aspects of this direct trade, where mayor attention was offered to the analysis of wood and timber shipments for the Spanish shipbuilding industry. Finally, the purpose of this work was to demonstrate that actually existed the direct trade between the South Baltic and Spain, which perhaps was small in a global context, however showed its utility against Anglo Dutch monopoly in traffic with different regions of this sea.

  5. On the comparability of knowledge transfer activities - a case study at the German Baltic Sea Coast focusing regional climate services

    Science.gov (United States)

    Meinke, Insa

    2017-06-01

    In this article the comparability of knowledge transfer activities is discussed by accounting for external impacts. It is shown that factors which are neither part of the knowledge transfer activity nor part of the participating institution may have significant impact on the potential usefulness of knowledge transfer activities. Differences in the potential usefulness are leading to different initial conditions of the knowledge transfer activities. This needs to be taken into account when comparing different knowledge transfer activities, e.g., in program evaluations. This study is focusing on regional climate services at the German Baltic Sea coast. It is based on two surveys and experiences with two identical web tools applied on two regions with different spatial coverage. The results show that comparability among science based knowledge transfer activities is strongly limited through several external impacts. The potential usefulness and thus the initial condition of a particular knowledge transfer activity strongly depends on (1) the perceived priority of the focused topic, (2) the used information channels, (3) the conformity between the research agenda of service providing institutions and information demands in the public, as well as (4) on the spatial coverage of a service. It is suggested to account for the described external impacts for evaluations of knowledge transfer activities. The results show that the comparability of knowledge transfer activities is limited and challenge the adequacy of quantitative measures in this context. Moreover, as shown in this case study, in particular regional climate services should be individually evaluated on a long term perspective, by potential user groups and/or by its real users. It is further suggested that evaluation criteria should be co-developed with these stakeholder groups.

  6. Nord stream: not just a pipeline. An analysis of the political debates in the Baltic Sea region regarding the planned gas pipeline from Russia to Germany

    Energy Technology Data Exchange (ETDEWEB)

    Whist, Bendik Solum

    2008-11-15

    This report is an analysis of the planned gas pipeline from Russia to Germany through the Baltic Sea known as Nord Stream. Although not yet realised, the project has, since its birth, been the subject of harsh criticism and opposition by a significant number of states that consider themselves affected by the pipeline. Whereas the Baltic States and Poland have interpreted the pipeline as a politically motivated strategy that will increase Russia's leverage on them and threaten their energy security, the debate in Sweden was at first mostly concerned with the prospect of increased Russian military presence in the Swedish Exclusive Economic Zone. The potential environmental impact of the pipeline has been, and continues to be, an overarching concern shared by all the littoral states of the Baltic Sea. Proponents of Nord Stream, most notably Germany, Russia and the Nord Stream consortium, have largely dismissed the concerns as unwarranted and argue that the pipeline is a common European project that all EU-members should embrace, as it will provide much-needed gas to an increasingly energy-thirsty union. This report is an extensive study of the divergent attitudes and debates that have surged in the region regarding Nord Stream, and the aim is to provide plausible explanations as to why the interpretations of the project have been so different in the various states. The report is based on a variety of sources, including several first-hand interviews with researchers and government officials in the Baltic Sea region. (author). refs.,fig.,tabs

  7. Solar radiation in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Jerzy Dera

    2010-12-01

    Full Text Available The influx of solar radiation to the Baltic Sea and its penetration into its waters is described on the basis of selected results of optical and bio-optical studies in the Baltic published by various authors during the past ca 50 years. The variability in the natural irradiance of this sea is illustrated on time scales from short-term fluctuations occurring during a single day to differences in mean monthly values over a period of many years. Data on variability of the proportions between UV, VIS and IR energy in the light reaching the sea surface are also discussed.Long-term monthly mean values of the incident solar radiation flux at the surface of the Baltic Proper are given; they were obtained from meteorological and solar radiation measurements and model approximations. The transmittances of these mean monthly radiation fluxes across the surface of the Baltic are given, as are the typical energyand spectral characteristics of the underwater irradiance, its attenuation with depth in the sea and the associated euphotic zone depths, as well as typical ranges of variability of these characteristics in different Baltic basins. Some of these characteristics are illustrated by typical empirical data. These mean values are not fully representative, however, because with the sole use of classical in situ measurement methods from on board research vessels in the Baltic, it has not been possible to gather a sufficientlyrepresentative set of empirical data that would adequately reflect the variability of the optical characteristics of all the basins of this sea. The article goes on to introduce the statistical model of vertical distributions of chlorophyll a concentration in the Baltic and the bio-optical model of Baltic Case 2 waters, the use of which contribute very significantly to this description of the optical characteristics and will enable this data set to be hugely expanded to include all the Baltic basins. This opportunity is presented by the

  8. Climate Change Effects on River Flow to the Baltic Sea

    Energy Technology Data Exchange (ETDEWEB)

    Graham, L. Phil [Swedish Meteorological and Hydrological Inst., Norrkoeping (Sweden)

    2004-06-01

    River flow to the Baltic Sea originates under a range of different climate regimes in a drainage basin covering some 1,600,000 km{sup 2}. Changes to the climate in the Baltic Basin will not only affect the total amount of freshwater flowing into the sea, but also the distribution of the origin of these flows. Using hydrological modeling, the effects of future climate change on river runoff to the Baltic Sea have been analyzed. Four different climate change scenarios from the Swedish Regional Climate Modelling Programme (SWECLIM) were used. The resulting change to total mean annual river flow to the Baltic Sea ranges from -2% to +15% of present-day flow according to the different climate scenarios. The magnitude of changes within different subregions of the basin varies considerably, with the most severe mean annual changes ranging from -30% to +40%. However, common to all of the scenarios evaluated is a general trend of reduced river flow from the south of the Baltic Basin together with increased river flow from the north.

  9. Two centuries of mean Baltic Sea level variability - an overview

    Science.gov (United States)

    Hünicke, Birgit; Zorita, Eduardo; Madsen, Kristine S.; Johannson, Milla

    2015-04-01

    The understanding of the processes which drive future climatic trends of sea-level on global to regional scales presumes the understanding of long-term variability in the observational period. This requires an accurate assessment of past and recent global and regional sea-level changes. Here, we review the observed changes (1800-2000) in mean sea-level variability in the Baltic region and the main (climate) drivers for these changes. We introduce the datasets available for studying sea-level and review the major published findings which can be derived from them. The Baltic is one of the most investigated sea-level sites in the world. It has a remarkable number of long and high quality densely spaced, tide gauge records with many stations in continuous operation since the late 19th century and some of the oldest sea-level records reporting since 200 years. More than 45 stations with at least 60 years of data have continued until recent times. Mean Baltic Sea level changes are dominated by crustal deformations due to the glacio-isostatic land movement effect. The basin-wide pattern of relative sea-level trends shows a clear north-south gradient with a negative rate of -8.2 mm/yr in the Gulf of Bothnia. Thus, RSL is falling in the northern Baltic (where the continental crust is uplifting at roughly 10 mm/yr) and rising in parts of the Southern Baltic. Baltic Sea level changes are affected by a sum of processes. These include thermo and halosteric effects, changes in wind, surface air-pressure and ocean currents, increasing freshwater input and gravitational effects. The decadal sea-level variability around the quasi-linear long-term trend is strongly influenced by westerly winds, closely related to the dominant large-scale sea-level pressure (SLP) pattern of the North Atlantic (NAO). The correlation between sea-level and SLP is highest in winter, but shows significant temporal and spatial heterogeneity with low values in southern Baltic parts. The decadal influence of

  10. Bio-engineering in the Baltic Sea

    DEFF Research Database (Denmark)

    Zandersen, Marianne

    2011-01-01

    Bio-engineering in the Baltic Sea – value of water quality improvements & risk perceptions Dr. Marianne Zandersen1 Department of Environmental Science, Aarhus University Abstract The Baltic Sea is heavily eutrofied and the trend has gone from bad to worse. The hypoxic zone has increased about 4...... of the water column to the bottom waters/deepwater. The expected effects include a slowing down of the sediment release from the bottom and improvement of the possibilities for aerobic bacterial decomposition and over time for the establishment of fauna. The projects test a bio-engineered approach to speeding...

  11. Radioactive contamination of the Arctic Region, Baltic Sea, and the Sea of Japan from activities in the former Soviet Union

    International Nuclear Information System (INIS)

    Bradley, D.J.

    1992-09-01

    Contamination of the Arctic regions of northern Europe and Russia, as well as the Sea of Japan, may become a potential major hazard to the ecosystem of these large areas. Widespread poor radioactive waste management practices from nuclear fuel cycle activities in the former Soviet Union have resulted in direct discharges to this area as well as multiple sources that may continue to release additional radioactivity. Information on the discharges of radioactive materials has become more commonplace in the last year, and a clearer picture is emerging of the scale of the contamination. Radioactivity in the Arctic oceans is now reported to be four times higher than would be derived from fallout from weapons tests. Although the characteristics and extent of the contamination are not well known, it has been stated that the contamination in the Arctic may range from 1 to 3.5 billion curies. As yet, no scientific sampling or measurement program has occurred that can verify the amount or extent of the contamination, or its potential impact on the ecosystem

  12. Grey seal predation on forage fish in the Baltic Sea

    DEFF Research Database (Denmark)

    Eero, Aro; Neuenfeldt, Stefan; Aho, Teija

    has increased accordingly. The diet of grey seal in the Baltic consists of ca. 20 fish species. The most abundant prey items in the Baltic proper are Baltic herring, sprat, and cod, and in the Bothnian Sea and Bothnian Bay Baltic herring, Coregonus sp., Baltic salmon, and sea trout. An adult seal...... consumes on average round 4.5 kg fish per day, of which 55% are clupeoids in the Baltic Main basin and 70% in the Bothnian Sea and Bothnian Bay. According to acoustic estimates, predator– prey distribution patterns, migration patterns, and multispecies analysis (SMS), the predation effect of grey seals...

  13. Fauna of gastropod molluscs in the Curonian Lagoon littoral biotopes (Baltic Sea, Kaliningrad region, Russia

    Directory of Open Access Journals (Sweden)

    Dmitry Filippenko

    2011-12-01

    Full Text Available A survey of the gastropod mollusc fauna in the coastal waters of the southern part of the Curonian Lagoon (Kaliningrad region, Russia were carried out. Study revealed 34 aquatic gastropods representing 30% of Prosobranchia and 70% of Pulmonata. Obtained data showed higher mollusc diversity in the littoral biotopes in comparison with open areas of the Lagoon. The fauna is represented by a typical Central European species complex of freshwater gastropods. The reed zone along the coastline in the Lagoon functions as a barrier and provides shallow water habitats with slow moving and warmer water, where maximum gastropod species concentrate.

  14. Lunar nodal tide in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Andrzej Wróblewski

    2001-03-01

    Full Text Available The nodal tide in the Baltic Sea was studied on the basis of the Stockholm tide-gauge readings for 1825-1984; data from the tide gauge at Swinoujscie for the same period provided comparative material. The Stockholm readings are highly accurate and are considered representative of sea levels in the whole Baltic; hence, the final computations were performed for the readings from this particular tide gauge for the period 1888-1980. The tidal amplitude obtained from measurements uncorrected for atmospheric pressure or wind field was compared with that forced only by atmospheric effects. The amplitude of the recorded nodal tide was the same as the equilibrium tide amplitude calculated for Stockholm. Calculations for equilibrium tide amplitudes were also performed for the extreme latitudes of the Baltic basin.

  15. Phosphorus dynamics in the Black Sea and Baltic Sea

    NARCIS (Netherlands)

    Dijkstra, N.|info:eu-repo/dai/nl/372617034

    2017-01-01

    The dynamics of the key nutrient phosphorus (P) in hypoxic and anoxic marine basins are still incompletely understood. This thesis focuses on the cycling of P in two of such basins: the Baltic Sea and the Black Sea. Water column particulates and sediments from the deep basin of the Black Sea were

  16. Introduction for the SI "Understanding the Baltic Sea"

    Science.gov (United States)

    Ikauniece, Anda; Markus Meier, H. E.; Kalniņa, Laimdota

    2017-08-01

    The Baltic Sea is a semi-enclosed sea with a low salinity, slow water exchange and distinguished stratification. Natural properties of the Baltic thus promote development of anoxic areas at the deepest parts of the sea. In addition, the coasts of the Baltic Sea are heavily populated - 85 million inhabitants living in the drainage basin and 9 countries surrounding the sea, most of them highly industrially developed. Anthropogenic activities consequently add considerable pressure on the already vulnerable environment of the sea. Eutrophication, over-fishing and changed food-web, oil pollution, occurrence of hazardous substances, damage of seafloor by trawling and construction works are all present in the Baltic Sea.

  17. Nitrogen fixation during an unusual summer Baltic Sea

    DEFF Research Database (Denmark)

    Voss, Maren; Dalsgaard, Tage; Fabian, Jenny

    Nitrogen fixation is a major nitrogen source for the open ocean. Also the land-locked, partly anoxic Baltic Sea receives almost as much nitrogen from nitrogen fixation as it receives from eutrophied rivers. Growth conditions for cyanobacteria are usually very favorable with low N/P ratios after...... winter mixing and a strong stratification and high surface temperatures in summer. However, the summer 2012 was quite different with strong winds and cold surface waters. Blooms of cyanobacteria therefore only developed in sheltered regions but not in the central Baltic Proper. Moreover, a greater...

  18. «Goroda-bliznecy»: novaja forma prigranichnogo sotrudnichestva v Baltijskom regione? [Twin cities: a new form of cross-border cooperation in the Baltic Sea Region?

    Directory of Open Access Journals (Sweden)

    Anishenko Anatoly

    2012-01-01

    Full Text Available The paper demonstrates the first attempt in Russian political studies to conduct a comprehensive analysis of the “twin city” movement as a form of cross-border cooperation in the Baltic region. This phenomenon emerged as a result of a global tendency towards more active involvement of municipal units in international cooperation, on the one hand, and aspirations of frontier cities and towns in the Baltic region to solve common problems together, on the other hand. This work is based on a comparative analysis method and a case study methodology. The authors consider four examples (city pairs: Tornio — Haparanda, Valga — Valka, Narva — Ivangorod and Imatra — Svetogorsk. The article specifies the terminological framework used in this field of research. The authors analyse achievements and failures of this type of international inter-municipal cooperation and emphasise that for twin cities it served not only as a means of survival in the difficult situation of the 1990s, but also as an experimental ground for new forms of crossborder cooperation. The authors arrive at the conclusion that this model proves to be promising for further development of integration processes in the Baltic region. This practice can be applied by Russian municipal, regional and federal authorities in promotion of cross-border cooperation not only in the Baltic region, but also in other regions of the country. Thus, influenced by the successful experience of Baltic frontier cities and towns, the Russian city of Nikel and the Norwegian city of Kirkenes decided to adopt this model for further development of their cooperation.

  19. Model simulation of inflow water to the Baltic Sea based on 129I

    DEFF Research Database (Denmark)

    Yi, P.; Chen, X.G.; Bao, D.X.

    2013-01-01

    The semi-enclosed Baltic Sea represents a vital economic and recreational resource for more than 90 million people inhabiting its coasts. Extensive contamination of this sea by a variety of anthropogenic pollutants has raised the concern of the people in the region. Quantifying seawater inflow...... is crucial for estimating potential environmental risks as well as to find the best remedial strategy. We present here a model to estimate water inflow from the North Sea to the Baltic Sea by utilizing 129I as a tracer. The results predicted inflow range of 230-450 km3/y with best fit value around 330 km3/y...... from the North Sea to the Baltic Sea during 1980-1999. Despite limited time series data on 129I, the model presented here demonstrates a new management tool for the Baltic Sea to calculate inflow water compared to conventional methods (such as salinity, temperature and hydrographic models). Crown...

  20. RELATIONS OF DISTRIBUTION OF THE LOW SULPHUR SHIPPING FUELS IN REGION OF THE BALTIC SEA IN THE BUNKERING BOAT-SHIP SUPPLY

    Directory of Open Access Journals (Sweden)

    Mariusz Matejski

    2012-12-01

    Full Text Available The article presents relations of distribution of the low sulphur marine fuels as result of being in force the International Convention for the Prevention of Pollution from Ships (MARPOL 73/78, especially the record establishing the region of the Baltic Sea and the North See as sulphur emission control areas (SECA. There are presented obligatory regulations and their influence on sale of the particular kinds of fuels in this region. There are also presented chosen procedures of care about cargo in relation bunker boat – harbour – ship, the delivery fuel procedures in relation bunker boat–ship and the quantitative analysis of distributed fuels on an example of chosen bunker boat.

  1. BALCOFISH - a BONUS+ project in the Baltic Sea

    DEFF Research Database (Denmark)

    Strand, Jakob

    The project BALCOFISH, acronym for "Integration of pollutant gene responses and fish ecology in Baltic coastal fisheries and management" is a newly started 3-years BONUS+-project funded by Baltic Organisations Network for Funding Science EEIG (www.bonusportal.org) with focus on contaminants...... and biological responses in coastal fish in the Baltic Sea....

  2. Mechanisms of variability in decadal sea-level trends in the Baltic Sea over the 20th century

    Science.gov (United States)

    Karabil, Sitar; Zorita, Eduardo; Hünicke, Birgit

    2017-11-01

    Coastal sea-level trends in the Baltic Sea display decadal-scale variations around a long-term centennial trend. In this study, we analyse the spatial and temporal characteristics of the decadal trend variations and investigate the links between coastal sea-level trends and atmospheric forcing on a decadal timescale. For this analysis, we use monthly means of sea-level and climatic data sets. The sea-level data set is composed of long tide gauge records and gridded sea surface height (SSH) reconstructions. Climatic data sets are composed of sea-level pressure, air temperature, precipitation, evaporation, and climatic variability indices. The analysis indicates that atmospheric forcing is a driving factor of decadal sea-level trends. However, its effect is geographically heterogeneous. This impact is large in the northern and eastern regions of the Baltic Sea. In the southern Baltic Sea area, the impacts of atmospheric circulation on decadal sea-level trends are smaller. To identify the influence of the large-scale factors other than the effect of atmospheric circulation in the same season on Baltic Sea sea-level trends, we filter out the direct signature of atmospheric circulation for each season separately on the Baltic Sea level through a multivariate linear regression model and analyse the residuals of this regression model. These residuals hint at a common underlying factor that coherently drives the decadal sea-level trends in the whole Baltic Sea. We found that this underlying effect is partly a consequence of decadal precipitation trends in the Baltic Sea basin in the previous season. The investigation of the relation between the AMO index and sea-level trends implies that this detected underlying factor is not connected to oceanic forcing driven from the North Atlantic region.

  3. Ctenophore population recruits entirely through larval reproduction in the central Baltic Sea

    DEFF Research Database (Denmark)

    Jaspers, Cornelia; Haraldsson, Matilda; Bolte, Sören

    2012-01-01

    Featured as research highlight in Nature. The comb jelly Mertensia ovum, widely distributed in Arctic regions, has recently been discovered in the northern Baltic Sea. We show that M. ovum also exists in the central Baltic but that the population consists solely of small-sized larvae (less than 1...

  4. Atmospheric forcing of decadal Baltic Sea level variability in the last 200 years. A statistical analysis

    Energy Technology Data Exchange (ETDEWEB)

    Huenicke, B. [GKSS-Forschungszentrum Geesthacht GmbH (Germany). Inst. fuer Kuestenforschung

    2008-11-06

    This study aims at the estimation of the impact of different atmospheric factors on the past sealevel variations (up to 200 years) in the Baltic Sea by statistically analysing the relationship between Baltic Sea level records and observational and proxy-based reconstructed climatic data sets. The focus lies on the identification and possible quantification of the contribution of sealevel pressure (wind), air-temperature and precipitation to the low-frequency (decadal and multi-decadal) variability of Baltic Sea level. It is known that the wind forcing is the main factor explaining average Baltic Sea level variability at inter-annual to decadal timescales, especially in wintertime. In this thesis it is statistically estimated to what extent other regional climate factors contribute to the spatially heterogeneous Baltic Sea level variations around the isostatic trend at multi-decadal timescales. Although the statistical analysis cannot be completely conclusive, as the potential climate drivers are all statistically interrelated to some degree, the results indicate that precipitation should be taken into account as an explanatory variable for sea-level variations. On the one hand it has been detected that the amplitude of the annual cycle of Baltic Sea level has increased throughout the 20th century and precipitation seems to be the only factor among those analysed (wind through SLP field, barometric effect, temperature and precipitation) that can account for this evolution. On the other hand, precipitation increases the ability to hindcast inter-annual variations of sea level in some regions and seasons, especially in the Southern Baltic in summertime. The mechanism by which precipitation exerts its influence on Baltic Sea level is not ascertained in this statistical analysis due to the lack of long salinity time series. This result, however, represents a working hypothesis that can be confirmed or disproved by long simulations of the Baltic Sea system - ocean

  5. Reference life cycle assessment scenarios for manure management in the Baltic Sea Regions - An assessment covering six animal production, five BSR countries, and four manure types

    DEFF Research Database (Denmark)

    Hamelin, Lorie; Baky, A; Cano-Bernal, J

    One major pre-condition for assessing a manure management technique in a whole system or LCA-approach is to define a reference system against which this technique can be assessed. This report thus presents and details the establishment of such reference systems, comprising eight different manure...... types (fattening pig slurry, dairy cow slurry, hens manure, bulls deep litter, fattening pig solid manure, dairy cow solid manure, horse manure & broilers manure) and five Baltic Sea Regions (Denmark, Sweden, Finland, Estonia, Poland), for a total of 15 reference systems. It presents, for each...... of these 15 reference systems, a description of the key managerial practices throughout the whole chain (e.g. storage duration, type of cover, type of manure application, etc.) and of the key site-specific conditions applying (e.g. average annual storage temperature, crop rotation and soil type on which...

  6. Geography of international clusters in the Baltic region

    Directory of Open Access Journals (Sweden)

    Mikhailov A. S.

    2014-03-01

    Full Text Available International cluster is a relatively new form of spatial organisation of economy in the globalisation conditions, which has become a frequent phenomenon in European countries, including those of the Baltic region. It requires a comprehensive study of both regional economics and economic geography. This article aims to identify structured international clusters in the Baltic region and map the corresponding regions. The results obtained will make it possible to get a comprehensive idea of the aggregate of international clusters existing and emerging in the region and put forward a hypothesis about the prerequisites of their formation. The methodological framework of the research is an integrated case study. The article considers the processes of transboundary and transnational regionalisation in the countries of the Baltic region aimed at the development of international clusters. ‘International cluster’ is defined as a new form of spatial economy. The author identifies and maps organised international clusters and cluster initiatives in the Baltic Sea region countries. The international clusters of the Baltic region are characterised according to the following criteria: the degree of geographical localisation, the organisational type of formation, and specialisation areas. The author analyses the degree of involvement of a Russian region into the processes of international cluster cooperation in the macroregion.

  7. First measurements with Argo flots in the Southern Baltic Sea

    Science.gov (United States)

    Walczowski, Waldemar; Goszczko, Ilona; Wieczorek, Piotr; Merchel, Malgorzata; Rak, Daniel

    2017-04-01

    The Argo programme is one of the most important elements of the ocean observing system. Currently almost 4000 Argo floats profile global oceans and deliver real time data. Originally Argo floats were developed for open ocean observations. Therefore a standard float can dive up to 2000 m and deep Argo floats are under development. However in the last years the shallow shelf seas become also interesting for Argo users. Institute of Oceanology Polish Academy of Sciences (IOPAN) participates in the Euro-Argo research infrastructure, the European contribution to Argo system. A legal and governance framework (Euro-Argo ERIC) was set up in May 2014. For a few years IOPAN has deployed floats mostly in the Nordic Seas and the European Arctic region. In the end of 2016 the first Polish Argo float was deployed in the Southern Baltic Sea. Building on the successful experience with Argo floats deployed by the Finnish oceanographers in the Bothnian Sea and Gotland Basin, the IOPAN float was launched in the Bornholm Deep during the fall cruise of IOPAN research vessel Oceania. The standard APEX float equipped with 2-way Iridium communication was used and different modes of operation, required for the specific conditions in the shallow and low saline Baltic Sea, were tested. Settings for the Baltic float are different than for the oceanic mode and were frequently changed during the mission to find the optimum solution. Changing the float parking depth during the mission allows for the limited control of the float drift direction. Results of a high resolution numerical forecast model for the Baltic Sea proved to be a valuable tool for determining the parking depth of the float in the different flow regimes. Trajectory and drift velocity of the Argo float deployed in the Southern Baltic depended strongly on the atmospheric forcing (in particular wind speed and direction), what was clearly manifested during the 'Axel' storm passing over the deployment area in January 2017. The first

  8. Saints and Sainthood around the Baltic Sea

    DEFF Research Database (Denmark)

    Jensen, Carsten Selch; Petersen, Nils Holger; Jensen, Kurt Villads

    This collection of articles covers most of the Baltic Region with a special focus on the cult of saints in Russia, Prussia, Finland, Sweden, Denmark, Estonia and Latvia (more commonly referred to in the Middle Ages as Livonia). The articles cover a wide range of topics, for example the introduction...

  9. Reconstructing Holocene temperature and salinity variations in the western Baltic Sea region : A multi-proxy comparison from the Little Belt (IODP Expedition 347, Site M0059)

    NARCIS (Netherlands)

    Kotthoff, Ulrich; Groeneveld, Jeroen; Ash, Jeanine; Fanget, Anne-Sophie; Krupinski, Nadine Quintana; Peyron, Odile; Stepanova, Anna; Warnock, Jonathan; van Helmond, N.A.G.M.; Passey, Benjamin H.; Clausen, Ole Rono; Bennike, O.; Andrén, Elinor; Granoszewski, Wojciech; Andrén, Thomas; Filipsson, Helena L.; Solveig-Seidenkrantz, M.; Slomp, C.P.; Bauersachs, Thorsten

    2017-01-01

    Sediment records recovered from the Baltic Sea during Integrated Ocean Drilling Program Expedition 347 provide a unique opportunity to study paleoenvironmental and -climate change in central/northern Europe. Such studies contribute to a better understanding of how environmental parameters change in

  10. Mesoscale wind field modifications over the Baltic Sea

    DEFF Research Database (Denmark)

    Källstrand, B.; Bergström, H.; Højstrup, J.

    2000-01-01

    For two consecutive days during spring 1997, the wind field over the Baltic Sea has been studied. The strength of the geostrophic wind speed is the major difference in synoptic conditions between these two days. During both days, the mesoscale wind field over most of the Baltic Sea is quite heter...

  11. Oil pollution in the Baltic Sea

    International Nuclear Information System (INIS)

    Kostianoy, Andrey G.; Lavrova, Olga Yu.

    2014-01-01

    This thorough review is based on observational satellite, airborne and in-situ data, scientific literature and technical reports, as well as the substantial experience of the authors, who hail from several Baltic Sea countries. They pay special attention to national practices, HELCOM and EMSA CleanSeaNet activities in oil pollution monitoring, and show different applications of the Seatrack Web model for oil spill drift prediction and the identification of illegal polluters, as well as for environmental risk assessment. Furthermore, some of the results on satellite monitoring of the Nord Stream gas pipeline construction in the Gulf of Finland are presented. This volume addresses the needs of specialists working in different fields of marine, environmental, and remote sensing sciences. It is a useful handbook on oil pollution for international and governmental agencies, as well as for policy makers who plan and manage oil and gas projects, the construction of ports and terminals, shipping, fishery, recreation, and tourist activities in the Baltic Sea.

  12. Oil pollution in the Baltic Sea

    Energy Technology Data Exchange (ETDEWEB)

    Kostianoy, Andrey G. [Russian Academy of Sciences, Moscow (Russian Federation). P.P. Shirshov Inst. of Oceanology; Lavrova, Olga Yu. (ed.) [Russian Academy of Sciences, Moscow (Russian Federation). Russian Space Research Institute

    2014-04-01

    This thorough review is based on observational satellite, airborne and in-situ data, scientific literature and technical reports, as well as the substantial experience of the authors, who hail from several Baltic Sea countries. They pay special attention to national practices, HELCOM and EMSA CleanSeaNet activities in oil pollution monitoring, and show different applications of the Seatrack Web model for oil spill drift prediction and the identification of illegal polluters, as well as for environmental risk assessment. Furthermore, some of the results on satellite monitoring of the Nord Stream gas pipeline construction in the Gulf of Finland are presented. This volume addresses the needs of specialists working in different fields of marine, environmental, and remote sensing sciences. It is a useful handbook on oil pollution for international and governmental agencies, as well as for policy makers who plan and manage oil and gas projects, the construction of ports and terminals, shipping, fishery, recreation, and tourist activities in the Baltic Sea.

  13. The radiological exposure of man from radioactivity in the Baltic Sea.

    Science.gov (United States)

    Nielsen, S P; Bengtson, P; Bojanowsky, R; Hagel, P; Herrmann, J; Ilus, E; Jakobson, E; Motiejunas, S; Panteleev, Y; Skujina, A; Suplinska, M

    1999-09-30

    A radiological assessment has been carried out considering discharges of radioactivity to the Baltic Sea marine environment since 1950. The sources of radioactivity that have been evaluated are atmospheric nuclear-weapons fallout, fallout from the Chernobyl accident in 1986, discharges of radionuclides from Sellafield and La Hague transported into the Baltic Sea, and discharges of radionuclides from nuclear installations located in the Baltic Sea area. Dose rates from man-made radioactivity to individual members of the public (critical groups) have been calculated based on annual intake of seafood and beach occupancy time. The dose rates to individuals from the regions of the Bothnian Sea and Gulf of Finland are predicted to be larger than from any other area in the Baltic Sea due to the pattern of Chernobyl fallout. The dose rates are predicted to have peaked in 1986 at a value of 0.2 mSv year-1. Collective committed doses to members of the public have been calculated based on fishery statistics and predicted concentrations of radionuclides in biota and coastal sediments. The total collective dose from man-made radioactivity in the Baltic Sea is estimated at 2600 manSv, of which approximately two-thirds originate from Chernobyl fallout, approximately one-quarter from atmospheric nuclear-weapons fallout, approximately 8% from European reprocessing facilities, and approximately 0.04% from nuclear installations bordering the Baltic Sea area. An assessment of small-scale dumping of low-level radioactive waste in the Baltic Sea in the 1960s by Sweden and the Soviet Union has showed that doses to man from these activities are negligible. Dose rates and doses from natural radioactivity dominate except for the year 1986 where dose rates to individuals from Chernobyl fallout in some regions of the Baltic Sea approached those from natural radioactivity.

  14. Assessing PCB pollution in the Baltic Sea - An equilibrium partitioning based study

    DEFF Research Database (Denmark)

    Lang, Susann-Cathrin; Mayer, Philipp; Hursthouse, Andrew

    2018-01-01

    Sediment cores and bottom water samples from across the Baltic Sea region were analyzed for freely dissolved concentrations (Cfree), total sediment concentrations (CT) and the dissolved aqueous fraction in water of seven indicator PCBs. Ex-situ equilibrium sampling of sediment samples was conducted...... in the Baltic Proper, with the highest levels observed in the western Baltic Sea. The SPME method has been demonstrated to be an appropriate and sensitive tool for area surveys presenting new opportunities to study the in-situ distribution and thermodynamics of hydrophobic organic chemicals at trace levels...

  15. Atomnaja jenergetika Pribaltiki: istorija vozniknovenija i politiko-jekonomicheskie osobennosti razvitija [Nuclear power in the Baltic Sea region: the history of emergence and the political and economic features of its development

    Directory of Open Access Journals (Sweden)

    Kretinin Gannady

    2013-01-01

    Full Text Available This article focuses on the development of peaceful nuclear power. The author draws attention to the fact that nuclear power is a rather young branch of national economy. However, over recent decades, it has already seen rises and falls, and a number of states have had tragic experiences of nuclear emergencies. Nevertheless, many countries — including the three Baltic States of Estonia, Latvia and Lithuania — express a strong interest in development, generation, and application of nuclear power. In the Baltic States, nuclear power dates back to the Soviet times, but its development was suspended pursuant to the EU regulations (the Ignalina NPP. Lithuania, Latvia, and Estonia have been striving for energy independence from Russia — the principal supplier of energy carriers to these countries. For a long time, the three Baltic States have been proclaiming their unanimity on the general European path of development. However, the reality proved to be different. The touchstone for achieving common goals was the idea of constructing a new NPP at the site of the closed Ignalina NPP. The author concludes that the joint construction of a new NPP is quite questionable. When it comes to politics, each of the three Baltic States is ready to build its own NPP. Thus, the development of nuclear power in the Baltic Sea region requires joint coordinated actions independent of any bloc-inspired interests of the states involved. Moreover, this success may prove sustainable if the actions are based on innovative decisions and modern technologies.

  16. Natural gas co-operation in the Baltic region

    International Nuclear Information System (INIS)

    Jensen, J.K.

    1996-01-01

    Co-operation between the gas companies in the Baltic Region has been in place for several years. The overview given in this paper shows that the co-operation has been developed in trade, investments, privatisation and participation in the restructuring process. Finally, through a broad technical co-operation, significant efforts are made to establish common operational practices, codes and standards and the integrity of gas transmission pipelines. The Baltic Region, from a resource and gas interconnection point of view, enjoys a strategic position in the future development of the gas industry in Europe. The Baltic gas sector represents an interesting and growing gas market with the significant gas storage capacity. The region is also located strategically for planned gas interconnections and could serve as a transit corridor for the future gas supplies from western Siberia or the North Sea. This co-operation in the region is being supported by international regulations and agreements such as the Energy Charter between the European Union and the central and east European countries. However, at present the gas industry in the Baltic Region seems to be ahead of these international agreements. It may well be seen that trade arrangements such as Third Party Access are implemented directly by market forces rather than through international agreements. The regional development may thus be a driving force for the implementation of the Internal Energy Market for the gas industry

  17. Spatial sea-level reconstruction in the Baltic Sea and in the Pacific Ocean from tide gauges observations

    Directory of Open Access Journals (Sweden)

    Marco Olivieri

    2016-07-01

    Full Text Available Exploiting the Delaunay interpolation, we present a newly implemented 2-D sea-level reconstruction from coastal sea-level observations to open seas, with the aim of characterizing the spatial variability of the rate of sea-level change. To test the strengths and weaknesses of this method and to determine its usefulness in sea-level interpolation, we consider the case studies of the Baltic Sea and of the Pacific Ocean. In the Baltic Sea, a small basin well sampled by tide gauges, our reconstructions are successfully compared with absolute sea-level observations from altimetry during 1993-2011. The regional variability of absolute sea level observed across the Pacific Ocean, however, cannot be reproduced. We interpret this result as the effect of the uneven and sparse tide gauge data set and of the composite vertical land movements in and around the region. Useful considerations arise that can serve as a basis for developing sophisticated approaches.

  18. 210Pb dating of Baltic Sea sediments

    International Nuclear Information System (INIS)

    Gellermann, R.

    1990-01-01

    The paper reports on the results of 210 Pb measurement in sediment cores from the Baltic Sea. The models used for the interpretation are derived and discussed. In general, the sedimentation parameters calculated with different models are consistent. However, parameters of cores independently taken on same partly show clearly differing values. The reasons of this observation have to be analysed by further studies. An essential problem considered in this paper is the dating of disturbed sediments. The use of such cores for the reconstruction of the input history of chemical indicators requires a deconvolution of data. The response function necessary for this procedure can be derived from 210 Pb measurements. The results of such a reconstruction considerably differ from those obtained by conventional dating models. The analysis of the measuring uncertainty of the indicator (e.g. lead) in the deconvolution procedure unveals the limits of the method and prevents it from overinterpretation. (orig.) [de

  19. Nutrient control of cyanobacterial blooms in the Baltic Sea

    NARCIS (Netherlands)

    Stal, L.J.; Staal, M.J.; Villbrandt, M.

    1999-01-01

    Cyanobacterial blooms in the Baltic Sea were investigated with respect to growth Limitation and nitrogen fixation. The community was composed predominantly of Synechococcus spp., and large, heterocystous, nitrogen-fixing cyanobacteria (Aphanizomenon spp, and Nodularia spp.), that usually formed

  20. Topical problems related to the pollution of the Baltic Sea

    International Nuclear Information System (INIS)

    1991-01-01

    This report sums up the current state of knowledge on the pollution of the Baltic Sea as an aquatic system. Mineral oil hydrocarbons, halogenated hydrocarbons, heavy metals and radionuclides are pinpointed as the main causes of pollution. Furthermore, the work presents the results of investigations carried through for several years on the contamination of salt-water fishes. The causes and consequences of nutrient accumulation in the Baltic Sea are discussed. (VT) [de

  1. Life on the margin: genetic isolation and diversity loss in a peripheral marine ecosystem, the Baltic Sea.

    Science.gov (United States)

    Johannesson, Kerstin; André, Carl

    2006-07-01

    Marginal populations are often isolated and under extreme selection pressures resulting in anomalous genetics. Consequently, ecosystems that are geographically and ecologically marginal might have a large share of genetically atypical populations, in need of particular concern in management of these ecosystems. To test this prediction, we analysed genetic data from 29 species inhabiting the low saline Baltic Sea, a geographically and ecologically marginal ecosystem. On average Baltic populations had lost genetic diversity compared to Atlantic populations: a pattern unrelated to dispersal capacity, generation time of species and taxonomic group of organism, but strongly related to type of genetic marker (mitochondrial DNA loci had lost c. 50% diversity, and nuclear loci 10%). Analyses of genetic isolation by geographic distance revealed clinal patterns of differentiation between Baltic and Atlantic regions. For a majority of species, clines were sigmoid with a sharp slope around the Baltic Sea entrance, indicating impeded gene flows between Baltic and Atlantic populations. Some species showed signs of allele frequencies being perturbed at the edge of their distribution inside the Baltic Sea. Despite the short geological history of the Baltic Sea (8000 years), populations inhabiting the Baltic have evolved substantially different from Atlantic populations, probably as a consequence of isolation and bottlenecks, as well as selection on adaptive traits. In addition, the Baltic Sea also acts a refuge for unique evolutionary lineages. This marginal ecosystem is thus vulnerable but also exceedingly valuable, housing unique genes, genotypes and populations that constitute an important genetic resource for management and conservation.

  2. On the comparability of knowledge transfer activities – a case study at the German Baltic Sea Coast focusing regional climate services

    Directory of Open Access Journals (Sweden)

    I. Meinke

    2017-06-01

    Full Text Available In this article the comparability of knowledge transfer activities is discussed by accounting for external impacts. It is shown that factors which are neither part of the knowledge transfer activity nor part of the participating institution may have significant impact on the potential usefulness of knowledge transfer activities. Differences in the potential usefulness are leading to different initial conditions of the knowledge transfer activities. This needs to be taken into account when comparing different knowledge transfer activities, e.g., in program evaluations. This study is focusing on regional climate services at the German Baltic Sea coast. It is based on two surveys and experiences with two identical web tools applied on two regions with different spatial coverage. The results show that comparability among science based knowledge transfer activities is strongly limited through several external impacts. The potential usefulness and thus the initial condition of a particular knowledge transfer activity strongly depends on (1 the perceived priority of the focused topic, (2 the used information channels, (3 the conformity between the research agenda of service providing institutions and information demands in the public, as well as (4 on the spatial coverage of a service. It is suggested to account for the described external impacts for evaluations of knowledge transfer activities. The results show that the comparability of knowledge transfer activities is limited and challenge the adequacy of quantitative measures in this context. Moreover, as shown in this case study, in particular regional climate services should be individually evaluated on a long term perspective, by potential user groups and/or by its real users. It is further suggested that evaluation criteria should be co-developed with these stakeholder groups.

  3. Baltic Eye: Focusing on Science and Communication to Improve Policy Making for the Baltic Sea Environment

    Science.gov (United States)

    McCrackin, M. L.

    2016-12-01

    In order to better communicate relevant scientific knowledge to policy- and decision makers, Stockholm University and the Baltic Sea 2020 Foundation partnered to create Baltic Eye in 2014. Seven scientists and two communicators constitute the core team of this initiative. The team integrates communications with scientific analysis and synthesis of Baltic Sea environmental issues. In the past year, the team has focused on two main issues: fisheries management and microplastics. Baltic Sea cod stocks are in poor condition, with large numbers of small individuals. Baltic Eye recommended improvements to the European Union's multiannual fisheries plan to better align with ecosystem-based management principles: prioritization of cod stock recovery, greater consideration of natural variability of temperature and salinity (which affects cod spawning success), and inclusion of mechanisms to adjust quotas in the event of major environmental changes. Communications included policy briefs and debate articles targeted to the European Parliament, national government ministries, and non-governmental organizations. Every year, up to 40 tons of microplastics from personal care products are released in the Baltic Sea catchment. Baltic Eye raised awareness of the issue and made recommended ways to reduce microplastic emissions. Communications included a public presentation to journalists, politicians, and representatives of Swedish government ministries. A policy brief was provided Heads of Delegates of the Helsinki Commission (for protrection of the Baltic Sea environment) in advance of a meeting to develop a plan of action for marine litter. Researchers were interviewed for radio, TV, and print media in Sweden, Finland, and Germany. Next steps are to engage with multinational manufacturers about plans to voluntarily phase out microplastics in personal care products.

  4. Plastic pollution on the Baltic beaches of Kaliningrad region, Russia.

    Science.gov (United States)

    Esiukova, Elena

    2017-01-30

    Contamination of sandy beaches of the Baltic Sea in Kaliningrad region is evaluated on the base of surveys carried out from June 2015 to January 2016. Quantity of macro/meso/microplastic objects in the upper 2cm of the sandy sediments of the wrack zone at 13 sampling sites all along the Russian coast is reported. Occurrence of paraffin and amber pieces at the same sites is pointed out. Special attention is paid to microplastics (range 0.5-5mm): its content ranges between 1.3 and 36.3 items per kg dry sediment. The prevailing found type is foamed plastic. No sound differences in contamination are discovered between beaches with high and low anthropogenic load. Mean level of contamination is of the same order of magnitude as has been reported by other authors for the Baltic Sea beaches. Copyright © 2016 Elsevier Ltd. All rights reserved.

  5. Biodiversity gradient in the Baltic Sea: a comprehensive inventory of macrozoobenthos data

    Science.gov (United States)

    Zettler, Michael L.; Karlsson, Anna; Kontula, Tytti; Gruszka, Piotr; Laine, Ari O.; Herkül, Kristjan; Schiele, Kerstin S.; Maximov, Alexey; Haldin, Jannica

    2014-03-01

    In the Helsinki Commission Red List project 2009-2012, taxonomic and distributional data of benthic (macro) invertebrates were compiled by the present authors in a comprehensive checklist of the Baltic Sea fauna. Based on the most recent and comprehensive data, this paper presents the diversity patterns observed among benthic invertebrates in the Baltic Sea. As expected, the total number of species per sub-region generally declined along the salinity gradient from the Danish Straits to the northern Baltic Sea. This relationship is well known from the Baltic Sea and has resulted in a general assumption of an exponentially positive relationship between species richness and salinity for marine species, and a negative relationship for freshwater species. In 1934, Remane produced a diagram to describe the hypothetical distribution of benthic invertebrate diversity along a marine-freshwater salinity gradient. Our results clearly indicated the validity of this theory for the macrozoobenthic diversity pattern within the Baltic Sea. Categorisation of sub-regions according to species composition showed both separation and grouping of some sub-regions and a strong alignment of similarity patterns of zoobenthic species composition along the salinity gradient.

  6. Situation analysis in relation to district heating and CHP in the Baltic Sea Region: Estonia, Latvia, Lithuania, Poland, Russia, Kaliningrad

    International Nuclear Information System (INIS)

    2000-11-01

    The situation analysis embraces chapters on: Estonia, Kaliningrad, Latvia, Lithuania, Poland and Russia, which experience varying degrees of difficulties with the transition to a market economy, and with integrating into the world market. In the following, the focus is on Lithuania, which has been visited during the project period. Lithuania has specific problems due to the existence of the Ignalina power plant, but has nevertheless characteristics, which apply to Estonia and Latvia as well. The problem with the quality of heat supply is rampant in all the countries, as is legal framework for the sector, except in Poland, which has generally attracted much attention from investors over the last ten years and has experienced a relatively sound political development in the energy sector. The main problem in all countries seem to relate to the policy development. The case of Lithuania confirms this. Following the observations on Lithuania, it is attempted to establish some points of concern, which are relevant to a greater or lesser extent in all countries, as well as some suggestions on how to move towards a solution of those problems. As mentioned Poland is generally in a better position, technically and politically than the three Baltic states, whereas Russia still needs to progress much on those issues. The general recommendations for initiatives in the Baltic countries in question are in brief: Establishing a clear view at governmental level of what the EU and liberalisation will bring, and what needs to be done additionally to secure main energy political objectives. Issues such as security of supply, environmental protection, low cost energy supplies and security of investments need to be thoroughly discussed at national level. It is important to understand that EU Directives provide a framework, not an answer to the future of the energy sector. Reinforcement of governmental bodies that deal with the practical problems of the energy sector. The main task of

  7. Hatching success in brackish water of Perca fluviatilis eggs obtained from the western Baltic Sea

    DEFF Research Database (Denmark)

    Christensen, Emil Aputsiaq Flindt; Skovrind, Mikkel; Olsen, Morten Tange

    2016-01-01

    Estuaries are important spawning areas for many freshwater and marine fishes. This is also the case for Baltic populations of European perch Perca fluviatilis, an important commercial species in the most of Europe. There is, however, inconsistency in the literature between the maximum salinity...... tolerance of the eggs in vivo, and the salinities at which some populations spawn in situ (7 vs. 9.6 ‰). In the present study, hatching success of perch was determined in vivo for a Danish, western Baltic, brackish water population at salinities of 4, 7, 10 and 12 ‰. Furthermore, in order to place...... of a mixture of haplotypes similar to the haplotypes, known to dominate in the Central and Western Europe and the Baltic Sea regions. Our results highlight the potential for recruitment of perch in coastal waters in the western Baltic Sea and have implications for both coastal management and the aquaculture...

  8. Dioxin concentrations in sediments of the Baltic Sea. A preliminary survey of existing data

    Energy Technology Data Exchange (ETDEWEB)

    Verta, M.; Salo, S.; Korhonen, M. [Finnish Environment Institute, Helsinki (Finland); Kiviranta, H. [National Public Health Institute, Helsinki (Finland); Koistinen, J.; Ruokojaervi, P.; Isosaari, P. [National Public Health Institute, Kuopio (Finland)

    2004-09-15

    The Baltic Sea region is one of the most contaminated areas with persistent organic pollutants (POPs) including polychlorinated dibenzo-p-dioxins and dibenzofurans (dioxins). The high load of dioxins in Baltic fish has lead to restrictions of the use of contaminated fish for human consumption. Uncertainties about sources, geographical distribution of these contaminants, the pathways of bioaccumulation and possible ecotoxicological and human health effects are of concern. POPs may enter the Baltic Sea from atmospheric deposition, riverine input and point sources along the coast. The ultimate sink for the majority of the compounds is the open sea and coastal sediments, although some fraction enters the food chain. Analysis of sediment has been widely used to study regional and temporal trends of dioxin pollution in freshwater and oceans and the Baltic Sea has been one of the most studied sea areas for dioxin-like compounds as well. Only a fraction (unknown) of the analytical results have been published in scientific papers, however. Here we present regional distribution of certain congeners of dioxins in surface sediments and in six sediment cores from the Baltic Sea. New data is compared with data on earlier Finnish sediment surveys. Some data from published papers and unpublished data from the Kattegat Sound is also given for reference. The purpose of this paper is to: 1. get an ''draft'' picture of regional distribution (possible hot spots, major regional differences) along the Finnish-Swedish-Danish-German coastal and open sea sites in the Baltic 2. study differences in congener distributions (source identification) 3. study temporal changes in sediment profiles 4. identify major areas with gap of data 5. call for more data (both published and grey literature as well as new sediment surveys)

  9. Sedimentation rate in the Baltic Sea

    Energy Technology Data Exchange (ETDEWEB)

    Ilus, E.; Mattila, J.; Klemola, S.; Ikaeheimonen, T.K. [STUK Radiation and Nuclear Safety Authority (Finland); Niemisto, L. [Finnish Inst. of Marine Research (Finland)

    2001-04-01

    Varying redox conditions may affect the occurrence and concentrations of certain radionuclides in the surface layers of sediments and in near-bottom waters by causing remobilization of radionuclides from surface sediments to the overlying water and their settling back into the sediment. In recent decades about 70.000 km{sup 2} of the sea bottom in the deepest part of the Baltic Sea (about 19% of its total area) have withstood almost continuous anoxic conditions; thus, it is important to know to what extent depletion of oxygen can affect the behaviour of these radionuclides in near-bottom waters. The aim of the project was to resolve the above question in a coastal basin periodically undergoing anoxic conditions. Radioecological processes in sediments and in near-bottom water under varying redoxconditions were studied in the deep area of the Haestholmsfjaerden Bay in Loviisa (eastern Gulf of Finland) in 1995-1996. The Haestholmsfjaerden Bay is a semienclosed basin between the mainland and the archipelago and is connected with the open Gulf of Finland only through narrow, shallow sounds: In 1995, total depletion of oxygen occurred in the hypolimnion of Haestholmsfjaerden Bay during 2 periods in late summer and autumn. In 1996, oxygen conditions were the worst ever observed in the Haestholmsfjaerden deep. During early autumn anoxic conditions prevailed for more than 1 month in the near-bottom water. The highest total phosphorus and total nitrogen concentrations in the near-bottom water during these periods were 20- and 4- fold compared with the corresponding values in surface water. According to the results obtained in this project, remobilization of {sup 137}Cs and {sup 239,240}Pu from sediments to near-bottom water is negligible or non-existent in the Haestholmsfjaerden deep. If it does occur, however, it may be so slight that it is not possible to observe with the methods used in this study. Although the anoxic periods are quite short in the Haestholmsfjaerden deep

  10. Testing the larval drift hypothesis in the Baltic Sea: retention versus dispersion caused by wind-driven circulation

    DEFF Research Database (Denmark)

    Hinrichsen, H.H.; St. John, Michael; Aro, E.

    2001-01-01

    oceanographic model of the Baltic Sea. Cod larvae were represented as Lagrangian drifters released in the deepwater region of the Bornholm Basin, the main spawning ground for Baltic cod. Simulations were performed for the major spawning seasons of 1993 and 1994. when annual and interannual variability...

  11. Distribution of 129I in the Baltic Sea using a model approach

    International Nuclear Information System (INIS)

    Peng Yi

    2010-01-01

    Full text: Anthropogenic input of 129 I has provided a number of applications in the marine and terrestrial environments. The discharged quantities into the atmosphere and the oceans have not been of particular health concern for regions at considerable distance from the discharge sources, as the Baltic Sea. Marine currents and wind patterns affect the migration and distribution of 129 I to and in the Baltic Sea, but there are no sufficient measured data to predict present day and future distribution of the isotope. Modeling may, in some cases, become an excellent alternative of prediction and later comparison with measured data, when they become available, can improve and correct the model results. Here we present a mass-balance model (SPM) originally established for phosphorus by Haekanson (2007), but slightly modified in this work to accommodate to calculation of 129 I concentration the Baltic Sea from different depths. The model is based on conventional equations and the processes governing elemental dynamic in the Baltic Sea such as mixing and diffusion. The calculated values were assessed with the average empirical data and reasonably matched in most areas of Baltic Sea. Moreover, 129 I fluxes corresponding to different parts of Baltic Sea are estimated which are, to our best knowledge, never done before but are the indispensable task for further research. Due to the semi-close characteristics of Baltic Sea, 129 I has a relatively long residence time and model prediction failed to run as they largely rely on meteorological data (temperature, precipitation and winds) which are difficult to prognoses and thus doubtful on a long time span. Despite this difficulty, the model presented here seems successful for prediction on a long timescale as all derived variables are accessed from GIS maps. (author)

  12. Changes in extreme sea-levels in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Andreia Ribeiro

    2014-04-01

    Full Text Available In a climate change context, changes in extreme sea-levels rather than changes in the mean are of particular interest from the coastal protection point of view. In this work, extreme sea-levels in the Baltic Sea are investigated based on daily tide gauge records for the period 1916–2005 using the annual block maxima approach. Extreme events are analysed based on the generalised extreme value distribution considering both stationary and time-varying models. The likelihood ratio test is applied to select between stationary and non-stationary models for the maxima and return values are estimated from the final model. As an independent and complementary approach, quantile regression is applied for comparison with the results from the extreme value approach. The rates of change in the uppermost quantiles are in general consistent and most pronounced for the northernmost stations.

  13. Caesium-137 distribution, inventories and accumulation history in the Baltic Sea sediments

    International Nuclear Information System (INIS)

    Zaborska, Agata; Winogradow, Aleksandra; Pempkowiak, Janusz

    2014-01-01

    The Baltic Sea is susceptible to pollution by hazardous substances due to limited water exchange, shallowness, and the large catchment area. Radionuclides, particularly 137 Cs, are one of the most hazardous anthropogenic substances present in the Baltic environment. This study was conducted to present 137 Cs present contamination that should further be a subject of reliable monitoring when the new Nuclear Power Plant is put into operation in the northern Poland. The sea-wide, up to date distribution of 137 Cs activities and inventories in the Baltic Sea bottom sediments are presented. The 137 Cs activity concentrations were measured in 30 cm long sediment cores collected at 22 sampling stations. Sediment accumulation rates were quantified by 210 Pb geochronology to follow the history of 137 Cs accumulation. The 137 Cs inventories and fluxes were calculated. Most of the Baltic Sea sediments accumulated 137 Cs in the range from 750 to 2675 Bq m −2 . The Bothnian Bay is severely contaminated by 137 Cs with inventories up to 95,191 Bq m −2 . This region is moreover characterized by extremely large patchiness of 137 Cs inventories. The 137 Cs annual fluxes are highest at the two stations located at the Bothnian Bay (342 Bq m −2 and 527 Bq m −2 ) due to large Chernobyl 137 Cs contamination of that region and high sediment accumulation rates. When these stations are excluded, the recent, annual mean value of 137 Cs load to the Baltic Sea deposits is 38 ± 22 Bq m −2 . The distribution of radio-caesium inventories over the Baltic Sea nowadays reflects the pattern of Chernobyl contamination. The radio-caesium deposited in surface sediments is not permanently buried, but may be resuspended and redeposited by currents, bioturbation or anthropogenic activities. -- Highlights: • 137 Cs contamination in the Baltic Sea was studied before the new NPP is put into operation. • Bothnian Sea sediments are severely contaminated by 137 Cs (inventories up to 95,191 Bq m

  14. Metal pollutants and radionuclides in the Baltic Sea - an overview

    Directory of Open Access Journals (Sweden)

    Piotr Szefer

    2002-06-01

    Full Text Available This overview presents in detail the state of knowledge of the abilities of various components of the Baltic Sea environment to accumulate trace elements and radionuclides. Particular components of the Baltic ecosystem (abiotic and biotic are considered as potential monitors of pollutants. The use of seaweeds, e.g. Fucus vesiculosus or Zostera marina is recommended, also molluscs, e.g. Mytilus edulis, for biomonitoring surveys of metal pollutants and radionuclides in the Baltic Sea. However, several requirements need to be met if results are to be reliable. Since metal levels and radionuclide activities in the growing tips of F. vesiculosus reflect exclusively the levels of their dissolved species in the ambient seawater, this alga is very useful for monitoring dissolved species of metal pollutants and radioisotopes in the Baltic ecosystem. In contrast, M. edulis, a filter feeder is an appropriate tool for monitoring trace elements occurring in both chemical forms, i.e. dissolved and suspended species. Therefore, full information on the bioavailability and toxicity of heavy metals (depending on their chemical speciation as pollutants of the Baltic Sea can be obtained if at least two biomonitoring organisms are applied simultaneously, e.g. F. vesiculosus and M. edulis. Moreover, the data matrix can be interpreted more accurately if not only trace element but also macroelement concentrations (Ca, Mg, Na, K in these two representatives of Baltic phyto- and zoobenthos are taken into consideration; this point requires special attention. Two coastal species of fish, i.e. Zoarces viviparus and Perca fluviatilis, are good biomonitors of metallic contaminants, so their use as sentinels is recommended. The budgets of chemical elements and the ecological status of the Baltic Sea are presented. Several "black spots", e.g. large estuaries and seaport towns, heavily polluted by trace elements, are identified in the Baltic Sea and other enclosed seas such the

  15. Aerosol carbon isotope composition over Baltic Sea

    Science.gov (United States)

    Garbaras, Andrius; Pabedinskas, Algirdas; Masalaite, Agne; Petelski, Tomasz; Gorokhova, Elena; Sapolaite, Justina; Ezerinskis, Zilvinas; Remeikis, Vidmantas

    2017-04-01

    Particulate carbonaceous matter is significant contributor to ambient particulate matter originating from intervening sources which contribution is difficult to quantify due to source diversity, chemical complexity and processes during atmospheric transport. Carbon isotope analysis can be extremely useful in source apportionment of organic matter due to the unique isotopic signatures associated with anthropocentric (fossil fuel), continental (terrestrial plants) and marine sources, and is particularly effective when these sources are mixed (Ceburnis et al., 2011;Ceburnis et al., 2016). We will present the isotope ratio measurement results of aerosol collected during the cruise in the Baltic Sea. Sampling campaign of PM10 and size segregated aerosol particles was performed on the R/V "Oceania" in October 2015. Air mass back trajectories were prevailing both from the continental and marine areas during the sampling period. The total carbon concentration varied from 1 µg/m3 to 8 µg/m3. Two end members (δ13C = -25‰ and δ13C = -28 ‰ ) were established from the total stable carbon isotope analysis in PM10 fraction. δ13C analysis in size segregated aerosol particles revealed δ13C values being highest in the 1 - 2.5 µm range (δ13C = -24.9 ‰ ) during continental transport, while lowest TC δ13C values (δ13C ≈ -27 ‰ ) were detected in the size range D50 marine environment. Additionally, concentration of bacteria and fungi were measured in size segregated and PM10 aerosol fraction. We were able to relate aerosol source δ13C end members with the abundance of bacteria and fungi over Baltic Sea combining air mass trajectories, stable isotope data, fungi and bacteria concentrations. Ceburnis, D., Garbaras, A., Szidat, S., Rinaldi, M., Fahrni, S., Perron, N., Wacker, L., Leinert, S., Remeikis, V., and Facchini, M.: Quantification of the carbonaceous matter origin in submicron marine aerosol by 13 C and 14 C isotope analysis, Atmospheric Chemistry and Physics

  16. Energy Policy in the Baltics: A Study of Regional Cooperation

    Science.gov (United States)

    Parks, Jessica Annette

    Regionalism, especially in the form of macro-regions, has emerged as a force of cooperation and integration within the European Union. The Baltic states, who have cooperated more closely since acceding to the EU, provide an effective case study for testing the unifying power of regionalism. As small states that have shared a damaging dependence on Russian energy imports, the three Baltic states share the incentive to cooperate as a region and develop their internal gas, oil, and electricity capacities. The Baltic states have displayed uneven tendencies of cooperation when it comes to energy, however. After presenting an overview of regionalism in the EU, this paper examines EU policy regarding energy in the Baltics, energy ties between the Baltics and other countries, and specific energy projects in the Baltics to show that while the Baltics do not yet have a strong tradition of cooperation in the energy sector, they have laid the groundwork to strengthen future ties.

  17. The maritime law of the Baltic Sea

    DEFF Research Database (Denmark)

    Jahnke, Carsten

    2017-01-01

    Before the end of the 13th century, the Baltic seamen created a law system codi ed in Bjarkey and Söderköping and then Schleswig laws. The increasing Germanic domination of Baltic navigation resulted in the creation of speci c maritime laws for Lübeck and Hamburg before the introduction of the Laws...

  18. Baltic Sea coastal erosion; a case study from the Jastrzębia Góra region

    Directory of Open Access Journals (Sweden)

    Uścinowicz Grzegorz

    2014-12-01

    Full Text Available The coastline in the Jastrzębia Góra area can be divided into three major zones of general importance: a beach and barrier section, a cliff section, and a section protected by a heavy hydrotechnical construction. These areas are characterised by a diverse geology and origin, and hence different vulnerability to erosion. In addition, observations have demonstrated a different pace of erosion within each zone. Based on the results obtained by remote sensing methods (analysis of aerial photographs and maps, it has been determined that the coastline in the barrier area, i.e., to the west of Jastrzębia Góra, moved landwards by about 130 m, in a period of 100 years, and 80 m over about 50 years. A smaller displacement of the shoreline could be observed within the cliff. Between the middle of the twentieth and the start of the twenty-first centuries the shore retreated by about 25 m. However, in recent years, an active landslide has led to the displacement of the uppermost part of the cliff locally up to 25 m. Another issue is, functioning since 2000, a heavy hydrotechnical construction which has been built in order to protect the most active part of the cliff. The construction is not stable and its western part, over a distance of 50 m, has moved almost 2 m vertically downwards and c. 2.5 m horizontally towards the sea in the past two years. This illustrates that the erosional factor does not comprise only marine abrasion, but also involves land-based processes determined by geology and hydrogeology. Changes in the shoreline at the beach and barrier part are constantly conditioned by rising sea levels, the slightly sloping profile of the sea floor and low elevation values of the backshore and dune areas. Cliffs are destroyed by mass wasting and repetitive storm surges that are responsible for the removal of the colluvium which protects the coast from adverse wave effects. Presumably, mass movements combined with groundwater outflow from the cliff

  19. Underwater Noise Modeling in Lithuanian Area of the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Donatas Bagočius

    2017-09-01

    Full Text Available Along with rising awareness of public and scientific societies about environmental and ecological impacts of underwater noise, the need for underwater noise modelling in the shallow Lithuanian area of Baltic Sea emerged. Marine Strategy Framework Directive issues regarding underwater noise indicators refers to possibility of evaluation of Good Environmental State using underwater noise measurements as well as possibility to model underwater noise. Main anthropogenic underwater noise contributor in the Seas is the shipping lanes as known due to date, with no exclusion of Lithuanian Baltic Sea area. In this manuscript, it is presented the methods of development of simplistic underwater ambient noise model purposed for computation of underwater soundscape in shallow area of the Lithuanian Baltic Sea.

  20. Monitoring of radionuclides in the Baltic Sea in 1988

    International Nuclear Information System (INIS)

    Saxen, R.; Ikaeheimonen, T.K.; Ilus, E.

    1989-12-01

    Monitoring of radioactive substances in the Baltic Sea was continued within the framework of the Finnish national monitoring programme. Samples of sea water, bottom sediment and fish were collected for radionuclide analyses. All samples were analysed for gamma-emitting radionuclides and partly also for 90 Sr and transuranic elements. The activity concentrations of 137 Cs were about 120 Bq/m 3 in the surface water of the Bothnian Bay, 220-320 Bq/m 3 in the Bothnian Sea, 120-230 Bq/m 3 in the Gulf of Finland and 150-170 Bq/m 3 in the Baltic Proper. In the open Gulf of Finland and Bothnian Sea the 137 Cs concentrations of surface water were about 20 and 55 % of the maximum values in 1986. The total amounts of 137 Cs in bottom sediments ranged from 1700 to 16000 Bq/m 2 . In the Gulf of Bothnia and Gulf of Finland the total amounts of 137 Cs were about 5-6 times higher in 1988 than before the Chernobyl accident and 3 times higher in the northern Baltic Proper. The 137 Cs concentrations in Baltic herring ranged from 20 to 37 Bq/kg fresh weight and in pike from 38 to 160 Bq/kg fresh weight, the maximum values being in samples supplied from the Vaasa archipelago. The internal radiation dose to Finnish people caused by the consumption of Baltic Sea fish in 1988 was about 0.009mSv. (orig.)

  1. Caesium-137 distribution, inventories and accumulation history in the Baltic Sea sediments.

    Science.gov (United States)

    Zaborska, Agata; Winogradow, Aleksandra; Pempkowiak, Janusz

    2014-01-01

    The Baltic Sea is susceptible to pollution by hazardous substances due to limited water exchange, shallowness, and the large catchment area. Radionuclides, particularly (137)Cs, are one of the most hazardous anthropogenic substances present in the Baltic environment. This study was conducted to present (137)Cs present contamination that should further be a subject of reliable monitoring when the new Nuclear Power Plant is put into operation in the northern Poland. The sea-wide, up to date distribution of (137)Cs activities and inventories in the Baltic Sea bottom sediments are presented. The (137)Cs activity concentrations were measured in 30 cm long sediment cores collected at 22 sampling stations. Sediment accumulation rates were quantified by (210)Pb geochronology to follow the history of (137)Cs accumulation. The (137)Cs inventories and fluxes were calculated. Most of the Baltic Sea sediments accumulated (137)Cs in the range from 750 to 2675 Bq m(-2). The Bothnian Bay is severely contaminated by (137)Cs with inventories up to 95,191 Bq m(-2). This region is moreover characterized by extremely large patchiness of (137)Cs inventories. The (137)Cs annual fluxes are highest at the two stations located at the Bothnian Bay (342 Bq m(-2) and 527 Bq m(-2)) due to large Chernobyl (137)Cs contamination of that region and high sediment accumulation rates. When these stations are excluded, the recent, annual mean value of (137)Cs load to the Baltic Sea deposits is 38 ± 22 Bq m(-2). The distribution of radio-caesium inventories over the Baltic Sea nowadays reflects the pattern of Chernobyl contamination. The radio-caesium deposited in surface sediments is not permanently buried, but may be resuspended and redeposited by currents, bioturbation or anthropogenic activities. Copyright © 2013 Elsevier Ltd. All rights reserved.

  2. Baltic Area - a specific region of climate change

    International Nuclear Information System (INIS)

    Shevkunova, Emma; Mescherskaya, Anna; Jaani, Ago

    1999-01-01

    The article points out that the Baltic Sea area has several specific characters of meteorological regime that makes it remarkably different from other regions in the Northen Hemisphere. First of all, it is caused by the geographical situation of the region - on the connecting area of two opposite atmospheric macro-systems - North-Atlantic ocean and Eurasian continental. The specialities of atmospheric circulation create weather situation that often causes a dissonance between climate changes here and general trends in Eastern and Western Europe in the same periods. On the contrary, in the periods of a general warming in Northern Hemisphere, extremely cold winters may occur in Baltic region. On the basis of the analysis of the data from mid-latitudes in the whole Northern Hemisphere, the main result is that the centre of present warming in the hemisphere is located in the eastern part of Baltic area, between Tallinn and St. Petersburg. A 8-year cycle appears in long time series of annual mean temperature. There is no connection between solar activity and the occurrence of extremely warm and extremely cold winter. The warming during the last 11 years (1988-1998) has been the greatest in this century. The reason of warming is growth of intensity of cyclonic activity in the North Atlantic, and especially, a remarkable increase in frequency of deep cyclones

  3. Factors affecting metal and radionuclide pollution in the Baltic sea

    Directory of Open Access Journals (Sweden)

    Martin Lodenius

    2016-12-01

    Full Text Available External pollution load in the Baltic Sea originates from urban, agricultural and industrial sources. Emissions of heavy metals have decreased substantially in the catchment area but the temporal trends are not always significant and differ with sample, area and pollutant. The most significant source of anthropogenic radioactivity in the Baltic Sea is fallout from the Chernobyl accident in 1986. Many factors affect the future development of pollutant concentrations including anthropogenic emissions, political decisions and changes in salinity, temperature and water currents, in eutrophication and oxygen status, in fisheries and in atmospheric deposition of pollutants. Large scale changes like eutrophication and climate change affect ecosystems in many ways, directly and indirectly, causing biological and abiotic effects. These factors are interrelated and difficult to predict. Measures aiming to enhance the ecological status of the Baltic Sea will certainly give positive results but this will take at least several decades.

  4. Inherent Optical Properties of the Baltic Sea in Comparison to Other Seas and Oceans

    Directory of Open Access Journals (Sweden)

    Susanne Kratzer

    2018-03-01

    Full Text Available In order to retrieve geophysical satellite products in coastal waters with high coloured dissolved organic matter (CDOM, models and processors require parameterization with regional specific inherent optical properties (sIOPs. The sIOPs of the Baltic Sea were evaluated and compared to a global NOMAD/COLORS Reference Data Set (RDS, covering a wide range of optical provinces. Ternary plots of relative absorption at 442 nm showed CDOM dominance over phytoplankton and non-algal particle absorption (NAP. At 670 nm, the distribution of Baltic measurements was not different from case 1 waters and the retrieval of Chl a was shown to be improved by red-ratio algorithms. For correct retrieval of CDOM from Medium Resolution Imaging Spectrometer (MERIS data, a different CDOM slope over the Baltic region is required. The CDOM absorption slope, SCDOM, was significantly higher in the northwestern Baltic Sea: 0.018 (±0.002 compared to 0.016 (±0.005 for the RDS. Chl a-specific absorption and ad [SPM]*(442 and its spectral slope did not differ significantly. The comparison to the MERIS Reference Model Document (RMD showed that the SNAP slope was generally much higher (0.011 ± 0.003 than in the RMD (0.0072 ± 0.00108, and that the SPM scattering slope was also higher (0.547 ± 0.188 vs. 0.4. The SPM-specific scattering was much higher (1.016 ± 0.326 m2 g−1 vs. 0.578 m2 g−1 in RMD. SPM retrieval could be improved by applying the local specific scattering. A novel method was implemented to derive the phase function (PF from AC9 and VSF-3 data. b ˜ was calculated fitting a Fournier–Forand PF to the normalized VSF data. b ˜ was similar to Petzold, but the PF differed in the backwards direction. Some of the sIOPs showed a bimodal distribution, indicating different water types—e.g., coastal vs. open sea. This seems to be partially caused by the distribution of inorganic particles that fall out relatively close to the coast. In order to improve remote

  5. Baltic Sea hazardous substances management: results and challenges.

    Science.gov (United States)

    Selin, Henrik; VanDeveer, Stacy D

    2004-05-01

    The introduction into the Baltic Sea of hazardous substances that are persistent, bioaccumulate, and are toxic is an important environmental and human health problem. Multilateral efforts to address this problem have primarily been taken under the Helsinki Commission (HELCOM). This article examines past HELCOM efforts on hazardous substances, and discusses future challenges regarding their management. The article finds that past actions on hazardous substances have had a positive effect on improving Baltic environmental quality and reducing human health risks, although there are remaining issues and difficulties that need to be addressed. In particular, four related future challenges for HELCOM management of hazardous substances are identified and discussed: i) the need to engender further implementation and building public and private sector capacities; ii) the need to improve data availability, quality and comparability across the region and international fora; iii) the need to strengthen existing regulations and incorporate new issues; and iv) the need to effectively coordinate HELCOM activities with efforts on hazardous substances in other international fora.

  6. International Agreements in the Multispecies Baltic Sea Fisheries

    DEFF Research Database (Denmark)

    Nieminen, Emmi; Kronbak, Lone Grønbæk; Lindroos, Marko

    2016-01-01

    This study analyses a multispecies (cod, herring and sprat) partition function game among three asymmetric countries in the Baltic Sea. Through an empirical application, the study highlights the importance of dynamic multispecies models in coalition formation. We show that the grand coalition...... between the three countries can be stabilised when the most efficient country compensates the other countries. This solution is not feasible when using a single-species model for the cod population; thus, taking into account the multispecies nature of the Baltic Sea fisheries, the scope of cooperation...

  7. The Baltic Klint beneath the central Baltic Sea and its comparison with the North Estonian Klint

    Science.gov (United States)

    Tuuling, Igor; Flodén, Tom

    2016-06-01

    Along its contact with the Baltic Shield, the margin of the East European Platform reveals a well-developed, flooded terraced relief. The most striking and consistent set of escarpments at the contact of the Lower Palaeozoic calcareous and terrigenous rocks, known as the Baltic Klint (BK), extends from northwest of Russia to the Swedish island of Öland. Marine seismic reflection profiling in 1990-2004 revealed the central Baltic Sea Klint (BSK) section in detail and enabled comparison of its geology/geomorphology with a classical klint-section onshore, namely the North Estonian Klint (NEK). The conception of the BK onshore, which is based on the land-sea separating terraced relief in northern Estonia, is not fully applicable beneath the sea. Therefore, we consider that the BSK includes the entire terraced Cambrian outcrop. We suggest the term "Baltic Klint Complex" to include the well-terraced margin of the Ordovician limestone outcrop, which is weakly developed in Estonia. Because of a steady lithological framework of the bedrock layers across the southern slope of the Fennoscandian Shield, the central BSK in the western and the NEK in the eastern part of the Baltic Homocline have largely identical morphologies. The North Estonian Ordovician limestone plateau with the calcareous crest of the BK extends across the central Baltic Sea, whereas morphological changes/variations along the Klint base occur due to the east-westerly lithostratigraphic/thickness changes in the siliciclastic Cambrian sequence. The verge of the NEK, located some 30-50 m above sea level, starts to drop in altitude as its east-westerly course turns to northeast-southwest in western Estonia. Further westwards, the BK shifts gradually into southerly deepening (0.1-0.2°) layers as its crest drops to c. 150 m below sea level (b.s.l.) near Gotska Sandön. This course change is accompanied by a considerable decrease in thickness of the platform sedimentary cover, as below the central Baltic Sea the

  8. Perspektivy razvitija atomnoj jenergetiki v vostochnoj chasti Baltijskogo morja kak faktor formirovanija sistemy mezhdunarodnyh otnoshenij v regione [The prospects of nuclear power development in the eastern part of the Baltic Sea region as a factor of the formation of international relations system in the region

    Directory of Open Access Journals (Sweden)

    Mezhevich Nikolay

    2013-01-01

    Full Text Available The current development of economic diplomacy in the world is determined by a combination of globalization and regionalization. In addition, it has an economic dimension. At the same time, the Baltic Sea region demonstrates large-scale politicisation of economic cooperation. The development of nuclear power in the eastern part of the Baltic Sea is indicative of the effectiveness of political and economic cooperation in the region. The author believes that Russia and the three Baltic States of Estonia, Latvia and Lithuania have the economic and technological opportunities for building up cooperation in the field of energy. This points to a question whether the traditional patterns of relations that developed among these countries in the past can be changed. A more pronounced international division of labour accompanied by the historically developed specialization of Russia makes nuclear power an important factor in Russia’s economic diplomacy. The promotion of Russian energy projects in the region contributes to the development of a system of mutually beneficial ties. The increasing energy deficiency in the region can serve an economic prerequisite to this process.

  9. Tolerance and potential for adaptation of a Baltic Sea rockweed under predicted climate change conditions.

    Science.gov (United States)

    Rugiu, Luca; Manninen, Iita; Rothäusler, Eva; Jormalainen, Veijo

    2018-03-01

    Climate change is threating species' persistence worldwide. To predict species responses to climate change we need information not just on their environmental tolerance but also on its adaptive potential. We tested how the foundation species of rocky littoral habitats, Fucus vesiculosus, responds to combined hyposalinity and warming projected to the Baltic Sea by 2070-2099. We quantified responses of replicated populations originating from the entrance, central, and marginal Baltic regions. Using replicated individuals, we tested for the presence of within-population tolerance variation. Future conditions hampered growth and survival of the central and marginal populations whereas the entrance populations fared well. Further, both the among- and within-population variation in responses to climate change indicated existence of genetic variation in tolerance. Such standing genetic variation provides the raw material necessary for adaptation to a changing environment, which may eventually ensure the persistence of the species in the inner Baltic Sea. Copyright © 2017 Elsevier Ltd. All rights reserved.

  10. Denitrification in the water column of the central Baltic Sea

    DEFF Research Database (Denmark)

    Dalsgaard, Tage; De Brabandere, Loreto; Hall, Per O. J.

    2013-01-01

    Removal of fixed nitrogen in the water column of the eastern Gotland Basin, central Baltic Sea, was studied during two cruises in September 2008 and August 2010. The water column was stratified with anoxic sulfidic bottom water meeting oxic nitrate containing water at the oxic–anoxic interface......3 or sulfide concentrations were converted to in situ rates using the measured water column concentrations of NO3 and sulfide and the actual measured relations between NO3 and sulfide concentrations and enitrification rates. In situ denitrification ranged from 0.24 to 15.9 nM N2 h1. Assuming...... area. Even with an active denitrification layer of 3–6 m thickness the pelagic denitrification per unit area clearly exceeded sediment denitrification rates elsewhere in the Baltic Sea. When extrapolated to the entire Baltic Proper (BP) denitrification in the water column was in the range of 132...

  11. Climate change effects on the Baltic Sea borderland between land and sea.

    Science.gov (United States)

    Strandmark, Alma; Bring, Arvid; Cousins, Sara A O; Destouni, Georgia; Kautsky, Hans; Kolb, Gundula; de la Torre-Castro, Maricela; Hambäck, Peter A

    2015-01-01

    Coastal habitats are situated on the border between land and sea, and ecosystem structure and functioning is influenced by both marine and terrestrial processes. Despite this, most scientific studies and monitoring are conducted either with a terrestrial or an aquatic focus. To address issues concerning climate change impacts in coastal areas, a cross-ecosystem approach is necessary. Since habitats along the Baltic coastlines vary in hydrology, natural geography, and ecology, climate change projections for Baltic shore ecosystems are bound to be highly speculative. Societal responses to climate change in the Baltic coastal ecosystems should have an ecosystem approach and match the biophysical realities of the Baltic Sea area. Knowledge about ecosystem processes and their responses to a changing climate should be integrated within the decision process, both locally and nationally, in order to increase the awareness of, and to prepare for climate change impacts in coastal areas of the Baltic Sea.

  12. Reconstructing Holocene temperature and salinity variations in the western Baltic Sea region: a multi-proxy comparison from the Little Belt (IODP Expedition 347, Site M0059)

    Science.gov (United States)

    Kotthoff, Ulrich; Groeneveld, Jeroen; Ash, Jeanine L.; Fanget, Anne-Sophie; Quintana Krupinski, Nadine; Peyron, Odile; Stepanova, Anna; Warnock, Jonathan; Van Helmond, Niels A. G. M.; Passey, Benjamin H.; Rønø Clausen, Ole; Bennike, Ole; Andrén, Elinor; Granoszewski, Wojciech; Andrén, Thomas; Filipsson, Helena L.; Seidenkrantz, Marit-Solveig; Slomp, Caroline P.; Bauersachs, Thorsten

    2017-12-01

    Sediment records recovered from the Baltic Sea during Integrated Ocean Drilling Program Expedition 347 provide a unique opportunity to study paleoenvironmental and climate change in central and northern Europe. Such studies contribute to a better understanding of how environmental parameters change in continental shelf seas and enclosed basins. Here we present a multi-proxy-based reconstruction of paleotemperature (both marine and terrestrial), paleosalinity, and paleoecosystem changes from the Little Belt (Site M0059) over the past ˜ 8000 years and evaluate the applicability of inorganic- and organic-based proxies in this particular setting. All salinity proxies (diatoms, aquatic palynomorphs, ostracods, diol index) show that lacustrine conditions occurred in the Little Belt until ˜ 7400 cal yr BP. A connection to the Kattegat at this time can thus be excluded, but a direct connection to the Baltic Proper may have existed. The transition to the brackish-marine conditions of the Littorina Sea stage (more saline and warmer) occurred within ˜ 200 years when the connection to the Kattegat became established after ˜ 7400 cal yr BP. The different salinity proxies used here generally show similar trends in relative changes in salinity, but often do not allow quantitative estimates of salinity. The reconstruction of water temperatures is associated with particularly large uncertainties and variations in absolute values by up to 8 °C for bottom waters and up to 16 °C for surface waters. Concerning the reconstruction of temperature using foraminiferal Mg  /  Ca ratios, contamination by authigenic coatings in the deeper intervals may have led to an overestimation of temperatures. Differences in results based on the lipid paleothermometers (long chain diol index and TEXL86) can partly be explained by the application of modern-day proxy calibrations to intervals that experienced significant changes in depositional settings: in the case of our study, the change from

  13. Structure and functioning of the acid-base system in the Baltic Sea

    Science.gov (United States)

    Kuliński, Karol; Schneider, Bernd; Szymczycha, Beata; Stokowski, Marcin

    2017-12-01

    The marine acid-base system is relatively well understood for oceanic waters. Its structure and functioning is less obvious for the coastal and shelf seas due to a number of regionally specific anomalies. In this review article we collect and integrate existing knowledge of the acid-base system in the Baltic Sea. Hydrographical and biogeochemical characteristics of the Baltic Sea, as manifested in horizontal and vertical salinity gradients, permanent stratification of the water column, eutrophication, high organic-matter concentrations and high anthropogenic pressure, make the acid-base system complex. In this study, we summarize the general knowledge of the marine acid-base system as well as describe the peculiarities identified and reported for the Baltic Sea specifically. In this context we discuss issues such as dissociation constants in brackish water, different chemical alkalinity models including contributions by organic acid-base systems, long-term changes in total alkalinity, anomalies of borate alkalinity, and the acid-base effects of biomass production and mineralization. Finally, we identify research gaps and specify limitations concerning the Baltic Sea acid-base system.

  14. Structure and functioning of the acid–base system in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    K. Kuliński

    2017-12-01

    Full Text Available The marine acid–base system is relatively well understood for oceanic waters. Its structure and functioning is less obvious for the coastal and shelf seas due to a number of regionally specific anomalies. In this review article we collect and integrate existing knowledge of the acid–base system in the Baltic Sea. Hydrographical and biogeochemical characteristics of the Baltic Sea, as manifested in horizontal and vertical salinity gradients, permanent stratification of the water column, eutrophication, high organic-matter concentrations and high anthropogenic pressure, make the acid–base system complex. In this study, we summarize the general knowledge of the marine acid–base system as well as describe the peculiarities identified and reported for the Baltic Sea specifically. In this context we discuss issues such as dissociation constants in brackish water, different chemical alkalinity models including contributions by organic acid–base systems, long-term changes in total alkalinity, anomalies of borate alkalinity, and the acid–base effects of biomass production and mineralization. Finally, we identify research gaps and specify limitations concerning the Baltic Sea acid–base system.

  15. A simple formula for the net long-wave radiation flux in the southern Baltic Sea

    Directory of Open Access Journals (Sweden)

    Tomasz Zapadka

    2001-09-01

    Full Text Available This paper discusses problems of estimating the net long-wave radiation flux at the sea surface on the basis of easily measurable meteorological quantities (air and sea surface temperatures, near-surface water vapour pressure, cloudiness. Empirical data and existing formulae are compared. Additionally, an improved formula for the southern Baltic region is introduced, with a systematic error of less than 1 W -2 and a statistical error of less than 20 W -2.

  16. Level and origin of Iodine-129 in the Baltic Sea

    Czech Academy of Sciences Publication Activity Database

    Hou, XL.; Dahlgaard, H.; Nielsen, SP.; Kučera, Jan

    2002-01-01

    Roč. 61, č. 3 (2002), s. 331-343 ISSN 0265-931X R&D Projects: GA AV ČR KSK4055109 Keywords : lodine-129 * Baltic sea * neutron activation analysis * seawater Subject RIV: DN - Health Impact of the Environment Quality Impact factor: 0.674, year: 2002

  17. The electricity markets around the Baltic Sea; Elmarknaderna runt Oestersjoen

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-12-01

    A thorough description of the electric power markets in the countries surrounding the Baltic sea is given in this book. Environmental problems and regulations and nuclear power are surveyed. Factors that may affect an expanded trade of electricity between the countries are analyzed

  18. Hypoxia sustains cyanobacteria blooms in the Baltic Sea

    NARCIS (Netherlands)

    Funkey, C.P.; Conley, D.J.; Reuss, N.S.; Humborg, C.; Jilbert, T.; Slomp, C.P.

    2014-01-01

    Nutrient over-enrichment is one of the classic triggering mechanisms for the occurrence of cyanobacteria blooms in aquatic ecosystems. In the Baltic Sea, cyanobacteria regularly occur in the late summer months and form nuisance accumulations in surface waters and their abundance has intensified

  19. Controlling benthic release of phosphorus in different Baltic Sea scales

    DEFF Research Database (Denmark)

    Pitkänen, Heikki; Bendtsen, Jørgen; Hansen, Jørgen L. S.

    The general aim of the PROPPEN project was to study whether it is possible to counteract near-bottom anoxia and excess benthic nutrient release ("internal loading") in the Baltic Sea by artificial oxygenation in cost-efficient and socio-economically beneficial ways. Two pilot sites were selected ...

  20. Anchovy Engraulis encrasicolus diet in the North and Baltic Seas

    NARCIS (Netherlands)

    Raab, K.E.; Nagelkerke, L.A.J.; Boerée, L.A.J.; Rijnsdorp, A.D.; Temming, A.; Dickey-Collas, M.

    2011-01-01

    The diet of anchovy (Engraulis encrasicolus) in the North and Baltic Seas was studied using stomach analysis from four sampling events in different areas. Zooplanktivory was confirmed; the most frequent prey items (in over 40% of stomachs) were copepods, malacostracan larvae and fish larvae. In the

  1. Essential coastal habitats for fish in the Baltic Sea

    Science.gov (United States)

    Kraufvelin, Patrik; Pekcan-Hekim, Zeynep; Bergström, Ulf; Florin, Ann-Britt; Lehikoinen, Annukka; Mattila, Johanna; Arula, Timo; Briekmane, Laura; Brown, Elliot John; Celmer, Zuzanna; Dainys, Justas; Jokinen, Henri; Kääriä, Petra; Kallasvuo, Meri; Lappalainen, Antti; Lozys, Linas; Möller, Peter; Orio, Alessandro; Rohtla, Mehis; Saks, Lauri; Snickars, Martin; Støttrup, Josianne; Sundblad, Göran; Taal, Imre; Ustups, Didzis; Verliin, Aare; Vetemaa, Markus; Winkler, Helmut; Wozniczka, Adam; Olsson, Jens

    2018-05-01

    Many coastal and offshore fish species are highly dependent on specific habitat types for population maintenance. In the Baltic Sea, shallow productive habitats in the coastal zone such as wetlands, vegetated flads/lagoons and sheltered bays as well as more exposed rocky and sandy areas are utilized by fish across many life history stages including spawning, juvenile development, feeding and migration. Although there is general consensus about the critical importance of these essential fish habitats (EFH) for fish production along the coast, direct quantitative evidence for their specific roles in population growth and maintenance is still scarce. Nevertheless, for some coastal species, indirect evidence exists, and in many cases, sufficient data are also available to carry out further quantitative analyses. As coastal EFH in the Baltic Sea are often found in areas that are highly utilized and valued by humans, they are subjected to many different pressures. While cumulative pressures, such as eutrophication, coastal construction and development, climate change, invasive species and fisheries, impact fish in coastal areas, the conservation coverage for EFH in these areas remains poor. This is mainly due to the fact that historically, fisheries management and nature conservation are not integrated neither in research nor in management in Baltic Sea countries. Setting joint objectives for fisheries management and nature conservation would hence be pivotal for improved protection of EFH in the Baltic Sea. To properly inform management, improvements in the development of monitoring strategies and mapping methodology for EFH are also needed. Stronger international cooperation between Baltic Sea states will facilitate improved management outcomes across ecologically arbitrary boundaries. This is especially important for successful implementation of international agreements and legislative directives such as the Baltic Sea Action Plan, the Marine Strategy Framework

  2. The Baltic Region in U.S. Western Civilization Textbooks.

    Science.gov (United States)

    Mork, Gordon R.

    1992-01-01

    Evaluates six U.S. western civilization textbooks' treatment of the Baltic region. Reports that the books devote little or no attention to the region, emphasize larger nations, and ignore Baltic social history. Suggests that social histories may continue to neglect small countries, whereas reaction against "Eurocentrism" may result in…

  3. Temporal variatiions of Sea ice cover in the Baltic Sea derived from operational sea ice products used in NWP.

    Science.gov (United States)

    Lange, Martin; Paul, Gerhard; Potthast, Roland

    2014-05-01

    Sea ice cover is a crucial parameter for surface fluxes of heat and moisture over water areas. The isolating effect and the much higher albedo strongly reduces the turbulent exchange of heat and moisture from the surface to the atmosphere and allows for cold and dry air mass flow with strong impact on the stability of the whole boundary layer and consequently cloud formation as well as precipitation in the downstream regions. Numerical weather centers as, ECMWF, MetoFrance or DWD use external products to initialize SST and sea ice cover in their NWP models. To the knowledge of the author there are mainly two global sea ice products well established with operational availability, one from NOAA NCEP that combines measurements with satellite data, and the other from OSI-SAF derived from SSMI/S sensors. The latter one is used in the Ostia product. DWD additionally uses a regional product for the Baltic Sea provided by the national center for shipping and hydrografie which combines observations from ships (and icebreakers) for the German part of the Baltic Sea and model analysis from the hydrodynamic HIROMB model of the Swedish meteorological service for the rest of the domain. The temporal evolution of the three different products are compared for a cold period in Februar 2012. Goods and bads will be presented and suggestions for a harmonization of strong day to day jumps over large areas are suggested.

  4. Characterization of the bacterioplankton community and its antibiotic resistance genes in the Baltic Sea.

    Science.gov (United States)

    Tiirik, Kertu; Nõlvak, Hiie; Oopkaup, Kristjan; Truu, Marika; Preem, Jens-Konrad; Heinaru, Ain; Truu, Jaak

    2014-01-01

    The residues from human environments often contain antibiotics and antibiotic resistance genes (ARGs) that can contaminate natural environments; the clearest consequence of that is the selection of antibiotic-resistant bacteria. The Baltic Sea is the second largest isolated brackish water reservoir on Earth, serving as a drainage area for people in 14 countries, which differ from one another in antibiotic use and sewage treatment policies. The aim of this study was to characterize the bacterioplankton structure and quantify ARGs (tetA, tetB, tetM, ermB, sul1, blaSHV, and ampC) within the bacterioplankton community of the Baltic Sea. Quantitative polymerase chain reaction was applied to quantify ARGs from four different sampling sites of the Baltic Sea over 2 years, and the bacterial communities were profiled sequencing the V6 region of the 16S rRNA gene on Illumina HiSeq2000. The results revealed that all the resistance genes targeted in the study were detectable from the Baltic Sea bacterioplankton. The percentage of tetA, tetB, tetM, ermB, and sul1 genes in the sea bacterial community varied between 0.0077% and 0.1089%, 0.0003% and 0.0019%, 0.0001% and 0.0105%, 0% and 0.0136%, and 0.0001% and 0.0438%, respectively. The most numerous ARG detected was the tetA gene and this gene also had the highest proportion in the whole microbial community. A strong association between bacterioplankton ARGs' abundance data and community phylogenetic composition was found, implying that the abundance of most of the studied ARGs in the Baltic Sea is determined by fluctuations in its bacterial community structure. © 2013 International Union of Biochemistry and Molecular Biology, Inc.

  5. Geological Storage od CO2 in the Southern Baltic Sea

    Science.gov (United States)

    Vernon, Richard; O'Neill, Nick; Pasquali, Riccardo; Niemi, Auli

    2014-05-01

    Geological Storage of CO2 in the Southern Baltic Sea Region The BASTOR project identifies and characterises the potential CO2 storage sites in the southern Baltic Sea. A regional theoretical storage capacity of 16Gt of CO2 in the Middle Cambrian sandstone beneath 900 metres of cap rock was estimated. 1.9Gt of this storage potential is estimated in the Dalders Monocline with some 743Mt CO2 in individual hydrocarbon and saline aquifer structures located mainly offshore Latvia and 128Mt in the Dalders Structure. Although the study has established a relatively large theoretical storage capacity, there is no effective capacity proven within these totals. Dynamic modelling undertaken in the Southern Swedish sector suggests that the relatively poor permeability and porosity characteristics would limit the injection rate to 0.5Mt per well per annum and restrict the reservoir pressure increase to 50% above the hydrostatic pressure for an injection period of 50 years. The dynamic modelling for this area suggests that an injection strategy for this sector would be limited to 5 injection wells giving a total injection capacity of 2.5 Mt per annum. Based on these results, the potential of the Southern Swedish offshore sector to sustain injection rates of CO2 required for regional industrial capture, even when using horizontal wells, brine extraction and hydraulic fracturing, would appear to be very low. Areas to the north east of the Monocline, such as offshore Latvia have been identified as having better reservoir quality despite limited data being available. These areas could sustain higher rates of injection and prove suitable areas for commercial storage. Furthermore, the regional storage capacity assessment demonstrated that there are sweet spots in the Cambrian reservoir such as onshore Latvia, where there is commercial gas storage, and both onshore and offshore Kaliningrad, where there is ongoing hydrocarbon production. The potential for seal failure was investigated as

  6. Organic carbon sequestration in coastal sediments across the Baltic Sea over the last 150 years

    Science.gov (United States)

    Ryves, David; Lewis, Jonathan; Rasmussen, Peter; Weckström, Kaarina; Andrén, Elinor; Clarke, Annemarie; Andersen, Thorbjørn; Yang, Handong; Hietanen, Susanah; Jilbert, Tom; Aigars, Juris; Anderson, N. John

    2017-04-01

    Coastal areas are extremely vulnerable to impacts from changing marine conditions, which are increasingly being driven by human activity (e.g. nutrient cycling, salinity, hydrography, sea level, climate change). Recent research into the complex and dynamic cycling of carbon in many increasingly nutrient-enriched coastal systems has suggested that they have switched from being net C sources to net C sinks over the last 150 years. This study seeks to explore carbon sequestration rates over the last 150 years from several key regions across the coastal Baltic Sea by synthesising organic carbon (OC) inventories from multiple well-dated sedimentary records from Baltic coasts. Such data will provide insight into long-term coastal change and how terrestrial human impact is influencing the ecology and biogeochemistry of the Baltic Sea. To examine past and present rates of carbon burial in key coastal areas of the Baltic Sea, a synthesis of 30-40 sediment cores from across the Baltic Sea is presented here from Baltic Denmark, Germany, Latvia, western Sweden and southern Finland, and are primarily from near-shore and shallow fjord/estuarine sites. The majority of sites span the last 100-150 years and the majority (>75%) are independently dated using 210Pb. Unsupported 210Pb inventories also allow raw sedimentation rates to be corrected for sediment focussing, permitting regionally reliable estimates of OC accumulation rates to be calculated and provide a plausible basis for upscaling OC accumulation rates within these key regions of the Baltic. Preliminary data analyses suggest a major step-change in system behaviour during the 20th century following low, stable ( 10 g OC m-2 yr-1 focussing corrected, OCFC) rates pre-1900. The initial rise in burial rates occurs early in the 1900s though is punctuated by a slight fall during the 1930s/1940s. After 1950, burial rates dramatically rise (consistently up to 45 g OCFC m-2 yr-1; 4 x pre-1900 rates), a pattern which is repeated

  7. Baltic Sea biodiversity status vs. cumulative human pressures

    DEFF Research Database (Denmark)

    Andersen, Jesper H.; Halpern, Benjamin S.; Korpinen, Samuli

    2015-01-01

    Abstract Many studies have tried to explain spatial and temporal variations in biodiversity status of marine areas from a single-issue perspective, such as fishing pressure or coastal pollution, yet most continental seas experience a wide range of human pressures. Cumulative impact assessments have...... been developed to capture the consequences of multiple stressors for biodiversity, but the ability of these assessments to accurately predict biodiversity status has never been tested or ground-truthed. This relationship has similarly been assumed for the Baltic Sea, especially in areas with impaired...... status, but has also never been documented. Here we provide a first tentative indication that cumulative human impacts relate to ecosystem condition, i.e. biodiversity status, in the Baltic Sea. Thus, cumulative impact assessments offer a promising tool for informed marine spatial planning, designation...

  8. To what extent does the salinity flux influence phytoplankton blooms? - Baltic Sea modeling study

    Science.gov (United States)

    Cieszyńska, Agata; Stramska, Małgorzata

    2016-04-01

    This work is focused on numerical modeling of biological-physical interactions and their influence on phytoplankton production and vertical distribution of biomass and its variability in the surface waters of the Baltic Sea. The area of interest is an inland sea with water salinity much smaller than observed in the global ocean (about one fifth of the open ocean value). Vertical distribution of the salinity has a significant influence on water column density stratification, and therefore influences intensity of mixing and the depth of mixed layer. This, in turn, defines environmental conditions for phytoplankton growth. Vertical distribution of water salinity in the basin is controlled by processes such as evaporation/precipitation, freezing/melting of sea ice and runoff of freshwater from land. There are a lot of different phytoplankton species in the area of the Baltic Sea. Every single one has its own characteristics and is sensitive to distinct complex environmental conditions. Biological-physical interactions controlling these microorganisms' life cycles are multiplicitous and because of their complexity difficult to quantify. The best and probably only way to study presented issue is the usage of numerical modeling tool. The results presented here are based on 1D numerical simulations carried out with Princeton Ocean Model (POM, http://www.ccpo.odu.edu/POMWEB/) merged with the Ecological Regional Ecosystem Model (ERGOM, http://ergom.net/) developed for the Baltic Sea research by German scientists from the Leibniz Institute for Baltic Sea Research in Warnemünde. In model simulations surface salinity flux was determined from the difference between the precipitation and evaporation rate at the air-sea interface. Data for parameterization of atmospheric forcing were defined based on data sets from National Centers of Environmental Prediction (NCEP). We carried out systematic calculations using different values of surface fluxes encompassing the range of

  9. Mezhdunarodnoe nauchnoe sotrudnichestvo v Baltijskom regione: naukometricheskij analiz [International research cooperation in the Baltic region: a scientometric analysis

    Directory of Open Access Journals (Sweden)

    Kuznetsova Tatyana

    2012-01-01

    Full Text Available This article examines the processes of international research cooperation in the Baltic Sea region. It focuses on research works published in the leading periodicals in 1993—2012. The empirical material is collected from the world’s largest abstract and citation database, SciVerse Scopus, which makes it possible to evaluate macroindicators at the national and global levels as well as the contribution of scholars to the global progress. The article also offers an assessment of the efficiency of research activities in the Baltic Sea region countries. It is based on a number of scientometric indicators that reflect the performance of universities in terms of research journal publications and the development of research cooperation in the field of Baltic studies. The authors consider the dynamics of research contribution and academic cooperation in the Baltic Sea countries in four leading fields — i. e. agricultural and biological sciences, Earth sciences, ecology and social sciences presented in the SciVerse Scopus scientometric database. The article provides a map of research cooperation in the Baltic Sea region.

  10. Modelling Potential Consequences of Different Geo-Engineering Treatments for the Baltic Sea Ecosystem

    Science.gov (United States)

    Schrum, C.; Daewel, U.

    2017-12-01

    From 1950 onwards, the Baltic Sea ecosystem suffered increasingly from eutrophication. The most obvious reason for the eutrophication is the huge amount of nutrients (nitrogen and phosphorus) reaching the Baltic Sea from human activities. However, although nutrient loads have been decreasing since 1980, the hypoxic areas have not decreased accordingly. Thus, geo-engineering projects were discussed and evaluated to artificially ventilate the Baltic Sea deep water and suppress nutrient release from the sediments. Here, we aim at understanding the consequences of proposed geo-engineering projects in the Baltic Sea using long-term scenario modelling. For that purpose, we utilize a 3d coupled ecosystem model ECOSMO E2E, a novel NPZD-Fish model approach that resolves hydrodynamics, biogeochemical cycling and lower and higher trophic level dynamics. We performed scenario modelling that consider proposed geo-engineering projects such as artificial ventilation of Baltic Sea deep waters and phosphorus binding in sediments with polyaluminium chlorides. The model indicates that deep-water ventilation indeed suppresses phosphorus release in the first 1-4 years of treatment. Thereafter macrobenthos repopulates the formerly anoxic bottom regions and nutrients are increasingly recycled in the food web. Consequently, overall system productivity and fish biomass increases and toxic algae blooms decrease. However, deep-water ventilation has no long-lasting effect on the ecosystem: soon after completion of the ventilation process, the system turns back into its original state. Artificial phosphorus binding in sediments in contrast decreases overall ecosystem productivity through permanent removal of phosphorus. As expected it decreases bacterial production and toxic algae blooms, but it also decreases fish production substantially. Contrastingly to deep water ventilation, artificial phosphorus binding show a long-lasting effect over decades after termination of the treatment.

  11. Ensemble modeling of the Baltic Sea ecosystem to provide scenarios for management.

    Science.gov (United States)

    Meier, H E Markus; Andersson, Helén C; Arheimer, Berit; Donnelly, Chantal; Eilola, Kari; Gustafsson, Bo G; Kotwicki, Lech; Neset, Tina-Simone; Niiranen, Susa; Piwowarczyk, Joanna; Savchuk, Oleg P; Schenk, Frederik; Węsławski, Jan Marcin; Zorita, Eduardo

    2014-02-01

    We present a multi-model ensemble study for the Baltic Sea, and investigate the combined impact of changing climate, external nutrient supply, and fisheries on the marine ecosystem. The applied regional climate system model contains state-of-the-art component models for the atmosphere, sea ice, ocean, land surface, terrestrial and marine biogeochemistry, and marine food-web. Time-dependent scenario simulations for the period 1960-2100 are performed and uncertainties of future projections are estimated. In addition, reconstructions since 1850 are carried out to evaluate the models sensitivity to external stressors on long time scales. Information from scenario simulations are used to support decision-makers and stakeholders and to raise awareness of climate change, environmental problems, and possible abatement strategies among the general public using geovisualization. It is concluded that the study results are relevant for the Baltic Sea Action Plan of the Helsinki Commission.

  12. The diet of whiting Merlangius merlangus in the western Baltic Sea.

    Science.gov (United States)

    Ross, S D; Gislason, H; Andersen, N G; Lewy, P; Nielsen, J R

    2016-05-01

    The diet of whiting Merlangius merlangus in the western Baltic Sea was investigated and compared to the diet in the southern North Sea. Clupeids were important prey in both areas, but especially in the western Baltic Sea where they constituted up to 90% of the diet of larger individuals. Gobies, brown shrimps and polychaetes were the main prey of juveniles in the western Baltic Sea, while a wider range of species were consumed in the North Sea. The shift to piscivory occurred at smaller sizes in the western Baltic Sea and the fish prey consumed was proportionately larger than in the southern North Sea. Estimates of prey abundance and food intake of M. merlangus are required to evaluate its predatory significance in the western Baltic Sea, but its diet suggests that it could be just as significant a fish predator here as in the southern North Sea. © 2016 The Fisheries Society of the British Isles.

  13. Blue carbon stocks in Baltic Sea eelgrass (Zostera marina) meadows

    DEFF Research Database (Denmark)

    Rohr, Maria Emilia; Bostrom, Christoffer; Canal-Vergés, Paula

    2016-01-01

    in Finland and 10 in Denmark to explore seagrass carbon stocks (C-org stock) and carbon accumulation rates (C-org accumulation) in the Baltic Sea area. The study sites represent a gradient from sheltered to exposed locations in both regions to reflect expected minimum and maximum stocks and accumulation....... The C-org stock integrated over the top 25 cm of the sediment averaged 627 g C m(-2) in Finland, while in Denmark the average C-org stock was over 6 times higher (4324 g Cm-2). A conservative estimate of the total organic carbon pool in the regions ranged between 6.98 and 44.9 t C ha(-1). Our results...... suggest that the Finnish eelgrass meadows are minor carbon sinks compared to the Danish meadows, and that majority of the C-org produced in the Finnish meadows is exported. Our analysis further showed that >40% of the variation in the C-org stocks was explained by sediment characteristics, i.e. dry...

  14. Blue carbon stocks in Baltic Sea eelgrass (Zostera marina) meadows

    DEFF Research Database (Denmark)

    Rohr, Maria Emilia; Bostrom, Christoffer; Canal-Vergés, Paula

    2016-01-01

    Although seagrasses cover only a minor fraction of the ocean seafloor, their carbon sink capacity accounts for nearly one-fifth of the total oceanic carbon burial and thus play a critical structural and functional role in many coastal ecosystems. We sampled 10 eelgrass (Zostera marina) meadows...... in Finland and 10 in Denmark to explore seagrass carbon stocks (C-org stock) and carbon accumulation rates (C-org accumulation) in the Baltic Sea area. The study sites represent a gradient from sheltered to exposed locations in both regions to reflect expected minimum and maximum stocks and accumulation....... The C-org stock integrated over the top 25 cm of the sediment averaged 627 g C m(-2) in Finland, while in Denmark the average C-org stock was over 6 times higher (4324 g Cm-2). A conservative estimate of the total organic carbon pool in the regions ranged between 6.98 and 44.9 t C ha(-1). Our results...

  15. Public Risk Perceptions towards Oxygenation Pumping in the Baltic Sea

    DEFF Research Database (Denmark)

    Zandersen, Marianne

    This report provides the findings of national representative risk perception surveys undertaken in Finland, Lithuania and Sweden during 2011 in rela-tion to oxygenation pumping in the Baltic Sea. The risk perception surveys find that as the scale of pumping increases from small- to large scale......, people are i) more concerned about the potential eco-logical risks and ii) less willing to accept the risks and uncertainties of pumping for the prospects of a faster recovery of the Baltic Sea through pumping. Across several dimensions, the Swedish population appears as the most risk averse...... and the Finnish population as the least risk averse towards potential risks and uncertainties associated with oxygenation pumping. We only find partial evidence that the level of risk (high vs. low risk) is a de-terminant for people’s perceived level of concern. In most cases, respondents show no statistically...

  16. On the Baltic Sea Response to Climate Change: Model Implications

    International Nuclear Information System (INIS)

    Omstedt, Anders; Leppaeranta, Matti

    1999-01-01

    The sensitivity of the Baltic Sea to climate change is reviewed on the basis of recent model studies. In general, the presently available models indicate that the Baltic Sea is a most sensitive system to climate change, particularly in air temperature, wind, fresh water inflow and the barotropic forcing in the entrance area. Available scenarios for ice conditions and climate warming around year 2100 show 2-3 months' shortening of the ice season in the Bothnian Bay and about 0.4 m decrease in the maximum annual ice thickness. Corresponding scenarios for climate cooling show 1-2 months' longer ice season in the Bothnian Bay and 0.2 - 0.5 m increase in the maximum annual ice thickness

  17. Fisheries management responses to climate change in the Baltic Sea

    DEFF Research Database (Denmark)

    Thøgersen, Thomas Talund; Hoff, Ayoe; Frost, Hans S.

    2015-01-01

    The long term management plan for cod in the eastern Baltic Sea was introduced in 2007 to ensure the full reproductive capacity of cod and an economically viable fishing industry. If these goals are to be fulfilled under changing environmental conditions, a readjustment of the current management...... plan may be needed. Therefore, this paper investigates the economic impacts of managing the cod, sprat and herring stocks in the eastern Baltic Sea, given on-going climate change, which is known to affect cod recruitment negatively. It is shown that climate change may have severe biological...... scenarios in which the economic consequences of different management objectives for the fishing fleets are assessed through a dynamic multi-species and multi-fleet bio-economic assessment model that include both species interactions and climate change....

  18. Denitrification in the water column of the central Baltic Sea

    DEFF Research Database (Denmark)

    Dalsgaard, Tage; De Brabandere, Loreto; Hall, Per

    2013-01-01

    Removal of fixed nitrogen in the water column of the eastern Gotland Basin, central Baltic Sea, was studied during two cruises in September 2008 and August 2010. The water column was stratified with anoxic sulfidic bottom water meeting oxic nitrate containing water at the oxic–anoxic interface...... was in some situations driven by organic matter alone. Nitrous oxide (N2O) became an increasingly important product of denitrification with increasing sulfide concentration and was >80% of the total N gas formation at 10 μM sulfide. The potential rates of denitrification measured in incubations at elevated......ML source and once the O2 has been depleted denitrification will follow resulting in enormous rates per unit area. Even with an active denitrification layer of 3–6 m thickness the pelagic denitrification per unit area clearly exceeded sediment denitrification rates elsewhere in the Baltic Sea. When...

  19. Fish, fishing, and pollutant reduction in the Baltic Sea

    DEFF Research Database (Denmark)

    MacKenzie, Brian; Almesjö, L.; Hansson, S.

    2004-01-01

    , and concentrations in fish and other fauna are still significant. Several models of the fluxes of these pollutants among the water, sediment, and atmosphere have been developed, but these generally omit the roles of fish and fisheries. We show that the standing stock of the most abundant fish species in the Baltic...... Sea was a sink for 260 kg of PCBs in the late 1980s to early 1990s and that the fishery removed as much or more PCB (31 kg yr(-1)) than other budget components (e.g., degradation in the water column). Accounting for fish and fisheries could increase our understanding of the fluxes of pollutants......The Baltic Sea is heavily polluted yet supports major Commercial fisheries for cod (Gadus morhua), herring (Clupea harengus), and sprat (Sprattus sprattus). Emissions of persistent organic pollutants, such as polychlorinated biphenyls (PCBs) and DDT, were high during the 1960s and 1970s...

  20. Corrosion of ammunition dumped in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Jurczak Wojciech

    2017-03-01

    Full Text Available The article presents the preliminary results of a research aimed at preparation for the extraction of chemical ammunition immersed after the Second World War(WWII in the waters of the Baltic Sea (BS. It has been 70 years since the first steps aiming at elimination of mainly German chemical weapons were taken, while the expected durability (tightness of metal barrels construction or other containers was estimated at 50-60 years. Consequently there is a serious risk of contamination of the Baltic Sea waters, not only with toxic warfare agents but also with the products of their decomposition. The evaluation of barrels’ and containers’ with TWA corrosion processes progress will determine the possibility of these munitions extraction to the surface in order to perform their classic utilization.

  1. Nutrient transports in the Baltic Sea - results from a 30-year physical-biogeochemical reanalysis

    Science.gov (United States)

    Liu, Ye; Meier, H. E. Markus; Eilola, Kari

    2017-04-01

    Long-term oxygen and nutrient transports in the Baltic Sea are reconstructed using the Swedish Coastal and Ocean Biogeochemical model (SCOBI) coupled to the Rossby Centre Ocean model (RCO). Two simulations with and without data assimilation covering the period 1970-1999 are carried out. Here, the weakly coupled scheme with the Ensemble Optimal Interpolation (EnOI) method is adopted to assimilate observed profiles in the reanalysis system. The reanalysis shows considerable improvement in the simulation of both oxygen and nutrient concentrations relative to the free run. Further, the results suggest that the assimilation of biogeochemical observations has a significant effect on the simulation of the oxygen-dependent dynamics of biogeochemical cycles. From the reanalysis, nutrient transports between sub-basins, between the coastal zone and the open sea, and across latitudinal and longitudinal cross sections are calculated. Further, the spatial distributions of regions with nutrient import or export are examined. Our results emphasize the important role of the Baltic proper for the entire Baltic Sea, with large net transport (export minus import) of nutrients from the Baltic proper into the surrounding sub-basins (except the net phosphorus import from the Gulf of Riga and the net nitrogen import from the Gulf of Riga and Danish Straits). In agreement with previous studies, we found that the Bothnian Sea imports large amounts of phosphorus from the Baltic proper that are retained in this sub-basin. For the calculation of sub-basin budgets, the location of the lateral borders of the sub-basins is crucial, because net transports may change sign with the location of the border. Although the overall transport patterns resemble the results of previous studies, our calculated estimates differ in detail considerably.

  2. Vertical distribution of 241Pu in the southern Baltic Sea sediments

    International Nuclear Information System (INIS)

    Strumińska-Parulska, Dagmara I.

    2014-01-01

    Highlights: • The unique study on 241 Pu in sediments from the southern Baltic Sea was presented. • 241 Pu was determined using alpha spectrometry by indirect method. • The biggest amount of 241 Pu existed in the surface layers of all analyzed sediments. • The highest 241 Pu amount comes from the Chernobyl accident. - Abstract: The vertical distribution of plutonium 241 Pu in marine sediments can assist in determining the deposition history and sedimentation process of analyzed regions. In addition, 241 Pu/ 239+240 Pu activity ratio could be used as a sensitive fingerprint for radioactive source identification. The present preliminary studies on vertical distribution of 241 Pu in sediments from four regions of the southern Baltic Sea are presented. The distribution of 241 Pu was not uniform and depended on sediment geomorphology and depth as well as location. The highest concentrations of plutonium were found in the surface layers of all analyzed sediments and originated from the Chernobyl accident

  3. Essential coastal habitats for fish in the Baltic Sea

    DEFF Research Database (Denmark)

    Kraufvelin, Patrik; Pekcan-Hekim, Zeynep; Bergström, Ulf

    2018-01-01

    Many coastal and offshore fish species are highly dependent on specific habitat types for population maintenance. In the Baltic Sea, shallow productive habitats in the coastal zone such as wetlands, vegetated flads/lagoons and sheltered bays as well as more exposed rocky and sandy areas are utili......Many coastal and offshore fish species are highly dependent on specific habitat types for population maintenance. In the Baltic Sea, shallow productive habitats in the coastal zone such as wetlands, vegetated flads/lagoons and sheltered bays as well as more exposed rocky and sandy areas...... are utilized by fish across many life history stages including spawning, juvenile development, feeding and migration. Although there is general consensus about the critical importance of these essential fish habitats (EFH) for fish production along the coast, direct quantitative evidence for their specific...... roles in population growth and maintenance is still scarce. Nevertheless, for some coastal species, indirect evidence exists, and in many cases, sufficient data are also available to carry out further quantitative analyses. As coastal EFH in the Baltic Sea are often found in areas that are highly...

  4. CLIMATE CHANGES AND ADAPTATION POLICIES IN THE BALTIC AND THE ADRIATIC REGIONS

    Directory of Open Access Journals (Sweden)

    Branko Bosnjakovic

    2015-06-01

    Full Text Available This paper provides an overview of differences and similarities of the current climate changes in the Baltic and Adriatic coastal regions and appropriate adaptation policies on national, regional and European level. All reparian countries are at different stages of developing and implementing national adaptation strategies. The proposal for an overall BSR wide Climate Change Adaptation Strategy and Action Plan has been launched with the aim to recommend actions for climate change adaptation in the Baltic region. No similar agreement has been concluded yet on the protection of the semi-closed Adriatic Sea, the surface of which is about 1/2 of that of the Baltic Sea, and whose coastal region is home to about 1/4 of that of the Baltic Sea. The differences in the socio-economic characteristics and indicators may be partly responsible for the differring attitudes, actions and reporting concerning the adaptation to climate change, both between individual countries, as well as between the two regions as a whole

  5. Operational SAR-based sea ice drift monitoring over the Baltic Sea

    Directory of Open Access Journals (Sweden)

    J. Karvonen

    2012-07-01

    Full Text Available An algorithm for computing ice drift from pairs of synthetic aperture radar (SAR images covering a common area has been developed at FMI. The algorithm has been developed based on the C-band SAR data over the Baltic Sea. It is based on phase correlation in two scales (coarse and fine with some additional constraints. The algorithm has been running operationally in the Baltic Sea from the beginning of 2011, using Radarsat-1 ScanSAR wide mode and Envisat ASAR wide swath mode data. The resulting ice drift fields are publicly available as part of the MyOcean EC project. The SAR-based ice drift vectors have been compared to the drift vectors from drifter buoys in the Baltic Sea during the first operational season, and also these validation results are shown in this paper. Also some navigationally useful sea ice quantities, which can be derived from ice drift vector fields, are presented.

  6. Ice and AIS: ship speed data and sea ice forecasts in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    U. Löptien

    2014-12-01

    Full Text Available The Baltic Sea is a seasonally ice-covered marginal sea located in a densely populated area in northern Europe. Severe sea ice conditions have the potential to hinder the intense ship traffic considerably. Thus, sea ice fore- and nowcasts are regularly provided by the national weather services. Typically, the forecast comprises several ice properties that are distributed as prognostic variables, but their actual usefulness is difficult to measure, and the ship captains must determine their relative importance and relevance for optimal ship speed and safety ad hoc. The present study provides a more objective approach by comparing the ship speeds, obtained by the automatic identification system (AIS, with the respective forecasted ice conditions. We find that, despite an unavoidable random component, this information is useful to constrain and rate fore- and nowcasts. More precisely, 62–67% of ship speed variations can be explained by the forecasted ice properties when fitting a mixed-effect model. This statistical fit is based on a test region in the Bothnian Sea during the severe winter 2011 and employs 15 to 25 min averages of ship speed.

  7. Divergence within and among Seaweed Siblings (Fucus vesiculosus and F. radicans in the Baltic Sea.

    Directory of Open Access Journals (Sweden)

    Angelica Ardehed

    Full Text Available Closely related taxa provide significant case studies for understanding evolution of new species but may simultaneously challenge species identification and definition. In the Baltic Sea, two dominant and perennial brown algae share a very recent ancestry. Fucus vesiculosus invaded this recently formed postglacial sea 8000 years ago and shortly thereafter Fucus radicans diverged from this lineage as an endemic species. In the Baltic Sea both species reproduce sexually but also recruit fully fertile new individuals by asexual fragmentation. Earlier studies have shown local differences in morphology and genetics between the two taxa in the northern and western Bothnian Sea, and around the island of Saaremaa in Estonia, but geographic patterns seem in conflict with a single origin of F. radicans. To investigate the relationship between northern and Estonian distributions, we analysed the genetic variation using 9 microsatellite loci in populations from eastern Bothnian Sea, Archipelago Sea and the Gulf of Finland. These populations are located in between earlier studied populations. However, instead of bridging the disparate genetic gap between N-W Bothnian Sea and Estonia, as expected from a simple isolation-by-distance model, the new populations substantially increased overall genetic diversity and showed to be strongly divergent from the two earlier analysed regions, showing signs of additional distinct populations. Contrasting earlier findings of increased asexual recruitment in low salinity in the Bothnian Sea, we found high levels of sexual reproduction in some of the Gulf of Finland populations that inhabit extremely low salinity. The new data generated in this study supports the earlier conclusion of two reproductively isolated but very closely related species. However, the new results also add considerable genetic and morphological complexity within species. This makes species separation at geographic scales more demanding and suggests a

  8. Divergence within and among Seaweed Siblings (Fucus vesiculosus and F. radicans) in the Baltic Sea.

    Science.gov (United States)

    Ardehed, Angelica; Johansson, Daniel; Sundqvist, Lisa; Schagerström, Ellen; Zagrodzka, Zuzanna; Kovaltchouk, Nikolaj A; Bergström, Lena; Kautsky, Lena; Rafajlovic, Marina; Pereyra, Ricardo T; Johannesson, Kerstin

    2016-01-01

    Closely related taxa provide significant case studies for understanding evolution of new species but may simultaneously challenge species identification and definition. In the Baltic Sea, two dominant and perennial brown algae share a very recent ancestry. Fucus vesiculosus invaded this recently formed postglacial sea 8000 years ago and shortly thereafter Fucus radicans diverged from this lineage as an endemic species. In the Baltic Sea both species reproduce sexually but also recruit fully fertile new individuals by asexual fragmentation. Earlier studies have shown local differences in morphology and genetics between the two taxa in the northern and western Bothnian Sea, and around the island of Saaremaa in Estonia, but geographic patterns seem in conflict with a single origin of F. radicans. To investigate the relationship between northern and Estonian distributions, we analysed the genetic variation using 9 microsatellite loci in populations from eastern Bothnian Sea, Archipelago Sea and the Gulf of Finland. These populations are located in between earlier studied populations. However, instead of bridging the disparate genetic gap between N-W Bothnian Sea and Estonia, as expected from a simple isolation-by-distance model, the new populations substantially increased overall genetic diversity and showed to be strongly divergent from the two earlier analysed regions, showing signs of additional distinct populations. Contrasting earlier findings of increased asexual recruitment in low salinity in the Bothnian Sea, we found high levels of sexual reproduction in some of the Gulf of Finland populations that inhabit extremely low salinity. The new data generated in this study supports the earlier conclusion of two reproductively isolated but very closely related species. However, the new results also add considerable genetic and morphological complexity within species. This makes species separation at geographic scales more demanding and suggests a need for more

  9. The diet of whiting Merlangius merlangus in the western Baltic Sea

    DEFF Research Database (Denmark)

    Ross, Stine Dalmann; Gislason, Henrik; Andersen, Niels Gerner

    2016-01-01

    The diet of whiting Merlangius merlangus in the western Baltic Sea was investigated and compared to the diet in the southern North Sea. Clupeids were important prey in both areas, but especially in the western Baltic Sea where they constituted up to 90% of the diet of larger individuals. Gobies...... North Sea. Estimates of prey abundance and food intake of M. merlangus are required to evaluate its predatory significance in the western Baltic Sea, but its diet suggests that it could be just as significant a fish predator here as in the southern North Sea...

  10. Chemical and Genetic Diversity of Nodularia spumigena from the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Hanna Mazur-Marzec

    2016-11-01

    Full Text Available Nodularia spumigena is a toxic, filamentous cyanobacterium occurring in brackish waters worldwide, yet forms extensive recurrent blooms in the Baltic Sea. N. spumigena produces several classes of non-ribosomal peptides (NRPs that are active against several key metabolic enzymes. Previously, strains from geographically distant regions showed distinct NRP metabolic profiles. In this work, conspecific diversity in N. spumigena was studied using chemical and genetic approaches. NRP profiles were determined in 25 N. spumigena strains isolated in different years and from different locations in the Baltic Sea using liquid chromatography-tandem mass spectrometry (LC-MS/MS. Genetic diversity was assessed by targeting the phycocyanin intergenic spacer and flanking regions (cpcBA-IGS. Overall, 14 spumigins, 5 aeruginosins, 2 pseudaeruginosins, 2 nodularins, 36 anabaenopeptins, and one new cyanopeptolin-like peptide were identified among the strains. Seven anabaenopeptins were new structures; one cyanopeptolin-like peptide was discovered in N. spumigena for the first time. Based on NRP profiles and cpcBA-IGS sequences, the strains were grouped into two main clusters without apparent influence of year and location, indicating persistent presence of these two subpopulations in the Baltic Sea. This study is a major step in using chemical profiling to explore conspecific diversity with a higher resolution than with a sole genetic approach.

  11. Shelf-to-basin iron shuttling enhances vivianite formation in deep Baltic Sea sediments

    Science.gov (United States)

    Reed, Daniel C.; Gustafsson, Bo G.; Slomp, Caroline P.

    2016-01-01

    Coastal hypoxia is a growing and persistent problem largely attributable to enhanced terrestrial nutrient (i.e., nitrogen and phosphorus) loading. Recent studies suggest phosphorus removal through burial of iron (II) phosphates, putatively vivianite, plays an important role in nutrient cycling in the Baltic Sea - the world's largest anthropogenic dead zone - yet the dynamics of iron (II) phosphate formation are poorly constrained. To address this, a reactive-transport model was used to reconstruct the diagenetic and depositional history of sediments in the Fårö basin, a deep anoxic and sulphidic region of the Baltic Sea where iron (II) phosphates have been observed. Simulations demonstrate that transport of iron from shelf sediments to deep basins enhances vivianite formation while sulphide concentrations are low, but that pyrite forms preferentially over vivianite when sulphate reduction intensifies due to elevated organic loading. Episodic reoxygenation events, associated with major inflows of oxic waters, encourage the retention of iron oxyhydroxides and iron-bound phosphorus in sediments, increasing vivianite precipitation as a result. Results suggest that artificial reoxygenation of the Baltic Sea bottom waters could sequester up to 3% of the annual external phosphorus loads as iron (II) phosphates, but this is negligible when compared to potential internal phosphorus loads due to dissolution of iron oxyhydroxides when low oxygen conditions prevail. Thus, enhancing vivianite formation through artificial reoxygenation of deep waters is not a viable engineering solution to eutrophication in the Baltic Sea. Finally, simulations suggest that regions with limited sulphate reduction and hypoxic intervals, such as eutrophic estuaries, could act as important phosphorus sinks by sequestering vivianite. This could potentially alleviate eutrophication in shelf and slope environments.

  12. Development of tools for integrated monitoring and assessment of hazardous substances and their biological effects in the Baltic Sea.

    Science.gov (United States)

    Lehtonen, Kari K; Sundelin, Brita; Lang, Thomas; Strand, Jakob

    2014-02-01

    The need to develop biological effects monitoring to facilitate a reliable assessment of hazardous substances has been emphasized in the Baltic Sea Action Plan of the Helsinki Commission. An integrated chemical-biological approach is vitally important for the understanding and proper assessment of anthropogenic pressures and their effects on the Baltic Sea. Such an approach is also necessary for prudent management aiming at safeguarding the sustainable use of ecosystem goods and Services. The BEAST project (Biological Effects of Anthropogenic Chemical Stress: Tools for the Assessment of Ecosystem Health) set out to address this topic within the BONUS Programme. BEAST generated a large amount of quality-assured data on several biological effects parameters (biomarkers) in various marine species in different sub-regions of the Baltic Sea. New indicators (biological response measurement methods) and management tools (integrated indices) with regard to the integrated monitoring approach were suggested.

  13. Acid-base properties of Baltic Sea dissolved organic matter

    Science.gov (United States)

    Hammer, Karoline; Schneider, Bernd; Kuliński, Karol; Schulz-Bull, Detlef E.

    2017-09-01

    Calculations related to the marine CO2 system that are based on alkalinity data may be strongly biased if the contributions of organic compounds are ignored. In coastal seas, concentrations of dissolved organic matter (DOM) are frequently high and alkalinity from inorganic compounds is low. In this study, based on measurements of total alkalinity, total CO2, and pH, we determined the organic alkalinity, Aorg, in water from the central Baltic Sea. The maximum Aorg measured in the surface mixed layer during the spring bloom was > 50 μmol/kg-SW but the Aorg decreased with depth and approached zero below the permanent halocline. This behavior could be attributed to the decreased pH of deeper water layers. The data were used to calculate the bulk dissociation constant, KDOM, for marine DOM and the fraction f of dissolved organic carbon (DOC) that acts as a carrier for acid-base functional groups. The p KDOM (7.27) agreed well with the value (7.34) previously estimated in a preliminary study of organic alkalinity in the Baltic Sea. The fraction of carbon atoms carrying acid-base groups was 17% and was somewhat higher than previously reported (12%). Spike experiments performed using artificial seawater and three different humic/fulvic substances tested whether the acid-base properties of these substances explain the results of our field study. Specifically, Aorg was determined at different concentrations (DOC) of the added humic/fulvic substances. The relationship between Aorg and the DOC concentrations indicated that humic/fulvic substances are more acidic (p KDOM < 6.5) than the bulk DOC natural occurring in the Baltic Sea.

  14. Microplastics in the Baltic Sea water: fibers everywhere.

    Science.gov (United States)

    Khatmullina, Lilia; Bagaev, Andrey; Chubarenko, Irina

    2017-04-01

    Presence of thin synthetic fibres (microfibres, tens of micrometres in diameter) in the surface waters and sediments is documented in different studies; however, the data on their exact abundances in the marine environment are commonly not presented owing to the shortcomings of the sampling procedure and general absence of well-established methodology for microplastics data collection. Nevertheless, we made an attempt to qualitatively analyse the amounts of microplastic fibres in the water column of the Baltic Sea. Water samples acquired during 6 cruises over the Baltic Sea Proper in 2015-2016 were filtered using 174 μm filters, which were subsequently analysed by microscope. From the total of 95 examined filters, 63% contained fibres. They were identified by colour and the reaction to the mechanical action of a thin needle: justification of anthropogenic origin was considered to be enough; any questionable objects were discarded. Fibres comprise more than 90% of the whole microplastic particles found in the near-bottom layers in the coastal zone and around 24% of microplastics in the surface and intermediate waters, with mean concentrations of 0.71 and 0.07 fibres per litre, respectively. Although the methodology still requires a lot of enhancement, even the preliminary results indicate ubiquitous distribution of the microfibres in the water column of the Baltic Sea with surface and bottom layers revealing higher abundances of microfibres in comparison with intermediate layers, and open-sea waters being less contaminated than the coastal ones. Apart from enhancing the sampling technics, we consider that it is crucial to understand principal physical features of fibers behavior in the marine environment (e.g., settling, entrainment by currents), as it would provide an opportunity to parameterize their transport and further on to model distribution of fibers in the water column. The research is supported by the Russian Science Foundation grant number 15-17-10020.

  15. Virulence Profiles of Vibrio vulnificus in German Coastal Waters, a Comparison of North Sea and Baltic Sea Isolates.

    Science.gov (United States)

    Bier, Nadja; Jäckel, Claudia; Dieckmann, Ralf; Brennholt, Nicole; Böer, Simone I; Strauch, Eckhard

    2015-12-15

    Vibrio vulnificus is a halophilic bacterium of coastal environments known for sporadically causing severe foodborne or wound infections. Global warming is expected to lead to a rising occurrence of V. vulnificus and an increasing incidence of human infections in Northern Europe. So far, infections in Germany were exclusively documented for the Baltic Sea coast, while no cases from the North Sea region have been reported. Regional variations in the prevalence of infections may be influenced by differences in the pathogenicity of V. vulnificus populations in both areas. This study aimed to compare the distribution of virulence-associated traits and genotypes among 101 V. vulnificus isolates from the Baltic Sea and North Sea in order to assess their pathogenicity potential. Furthermore, genetic relationships were examined by multilocus sequence typing (MLST). A high diversity of MLST sequences (74 sequence types) and differences regarding the presence of six potential pathogenicity markers were observed in the V. vulnificus populations of both areas. Strains with genotypes and markers associated with pathogenicity are not restricted to a particular geographic region. This indicates that lack of reported cases in the North Sea region is not caused by the absence of potentially pathogenic strains.

  16. Virulence Profiles of Vibrio vulnificus in German Coastal Waters, a Comparison of North Sea and Baltic Sea Isolates

    Directory of Open Access Journals (Sweden)

    Nadja Bier

    2015-12-01

    Full Text Available Vibrio vulnificus is a halophilic bacterium of coastal environments known for sporadically causing severe foodborne or wound infections. Global warming is expected to lead to a rising occurrence of V. vulnificus and an increasing incidence of human infections in Northern Europe. So far, infections in Germany were exclusively documented for the Baltic Sea coast, while no cases from the North Sea region have been reported. Regional variations in the prevalence of infections may be influenced by differences in the pathogenicity of V. vulnificus populations in both areas. This study aimed to compare the distribution of virulence-associated traits and genotypes among 101 V. vulnificus isolates from the Baltic Sea and North Sea in order to assess their pathogenicity potential. Furthermore, genetic relationships were examined by multilocus sequence typing (MLST. A high diversity of MLST sequences (74 sequence types and differences regarding the presence of six potential pathogenicity markers were observed in the V. vulnificus populations of both areas. Strains with genotypes and markers associated with pathogenicity are not restricted to a particular geographic region. This indicates that lack of reported cases in the North Sea region is not caused by the absence of potentially pathogenic strains.

  17. Sedimentary alkenone distributions reflect salinity changes in the Baltic Sea over the Holocene

    NARCIS (Netherlands)

    Warden, L.A.; van der Meer, M.T.J.; Moros, Matthias; Sinninghe Damsté, J.S.

    2016-01-01

    The Baltic Sea has had a complex salinity history since the last deglaciation. Here we show how distributions of alkenones and their δD values varied with past fluctuations in salinity in the Baltic Sea over the Holocene by examining a Holocene record (11.2–0.1 cal kyr BP) from the Arkona Basin.

  18. The history of cyanobacterial blooms in the Baltic Sea.

    Science.gov (United States)

    Finni, T; Kononen, K; Olsonen, R; Wallström, K

    2001-08-01

    Long-term information on possible changes in cyanobacterial blooms in the Baltic Sea, formed mainly by Nodularia spumigena and Aphanizomenon sp., was sought in published records in historical (years 1887-1938) and modern (years 1974-1998) phytoplankton data sets. Old and new sampling methods and fixatives were tested to improve the comparison of data that had been collected and analyzed in different ways. A hundred years ago, plankton was mainly of interest as a source of fish food; eutrophication problems were only locally reported from the coast, mainly in southern haffs and the receiving waters of larger cities. There were few recordings of open-sea blooms before World War II. Abundances of Nodularia spumigena and Aphanizomenon sp. were low in the old material, and 137 summer samples from 1887-1938 showed no peak abundance. High abundances are common in the new material, and the range of the numbers of both taxa has increased markedly relative to the old material. Since the 1960s, cyanobacterial blooms have been common in the open sea in both the Baltic proper and the Gulf of Finland, indicating high availability of nutrients.

  19. Fish production and climate: Sprat in the Baltic Sea

    DEFF Research Database (Denmark)

    MacKenzie, Brian; Köster, Fritz

    2004-01-01

    Processes controlling the production of new fish (recruitment) are poorly understood and therefore challenge population ecologists and resource managers. Sprat in the Baltic Sea is no exception: recruitment varies widely between years and is virtually independent of the biomass of mature sprat...... of data that recruitment depends on temperature conditions during the months when sprat gonads, eggs, and larvae are developing. We also show that recruitment can be predicted before adults spawn (and fully 15 months earlier than using present technology) by using linkages between recruitment, large-scale...

  20. Fish, fishing, and pollutant reduction in the Baltic Sea

    DEFF Research Database (Denmark)

    MacKenzie, Brian; Almesjö, L.; Hansson, S.

    2004-01-01

    , and concentrations in fish and other fauna are still significant. Several models of the fluxes of these pollutants among the water, sediment, and atmosphere have been developed, but these generally omit the roles of fish and fisheries. We show that the standing stock of the most abundant fish species in the Baltic...... Sea was a sink for 260 kg of PCBs in the late 1980s to early 1990s and that the fishery removed as much or more PCB (31 kg yr(-1)) than other budget components (e.g., degradation in the water column). Accounting for fish and fisheries could increase our understanding of the fluxes of pollutants...

  1. Fish production and climate: Sprat in the Baltic Sea

    DEFF Research Database (Denmark)

    MacKenzie, Brian; Köster, Fritz

    2004-01-01

    Processes controlling the production of new fish (recruitment) are poorly understood and therefore challenge population ecologists and resource managers. Sprat in the Baltic Sea is no exception: recruitment varies widely between years and is virtually independent of the biomass of mature sprat...... of data that recruitment depends on temperature conditions during the months when sprat gonads, eggs, and larvae are developing. We also show that recruitment can be predicted before adults spawn (and fully 15 months earlier than using present technology) by using linkages between recruitment, large...

  2. Variational data assimilation problem for the Baltic Sea thermodynamics

    Science.gov (United States)

    Zakharova, Natalia; Agoshkov, Valery; Parmuzin, Eugene

    2015-04-01

    The most versatile and promising technology for solving problems of monitoring and analysis of the natural environment is a four-dimensional variational data assimilation of observation data. In such problems not only the development and justification of algorithms for numerical solution of variational data assimilation problems but the properties of the optimal solution play an important role. In this work the variational data assimilation problems in the Baltic Sea water area were formulated and studied. Numerical experiments on restoring the ocean heat flux and obtaining solution of the system (temperature, salinity, velocity, and sea surface height) in the Baltic Sea primitive equation hydrodynamics model with assimilation procedure were carried out. In the calculations we used daily sea surface temperature observation from Danish meteorological Institute, prepared on the basis of measurements of the radiometer (AVHRR, AATSR and AMSRE) and spectroradiometer (SEVIRI and MODIS). The spatial resolution of the model grid with respect to the horizontal variables amounted to 0.0625x0.03125 degree. The results of the numerical experiments are presented. This study was supported by the Russian Foundation for Basic Research (project 13-01-00753, project 14-01-31195) and project 14-11-00609 by the Russian Science Foundation. References: 1 E.I. Parmuzin, V.I. Agoshkov, Numerical solution of the variational assimilation problem for sea surface temperature in the model of the Black Sea dynamics. Russ. J. Numer. Anal. Math. Modelling (2012) 27, No.1, 69-94 2 Zakharova N.B., Agoshkov V.I., Parmuzin E.I., The new method of ARGO buoys system observation data interpolation. Russian Journal of Numerical Analysis and Mathematical Modelling. Vol. 28, Issue 1, 2013. 3 Zalesny V.B., Gusev A.V., Chernobay S.Yu., Aps R., Tamsalu R., Kujala P., Rytkönen J. The Bal-tic Sea circulation modelling and assessment of marine pollution, Russ. J. Numer. Analysis and Math. Modelling, 2014, V 29

  3. The potential of using remote sensing data to estimate air-sea CO2 exchange in the Baltic Sea

    Science.gov (United States)

    Parard, Gaëlle; Rutgersson, Anna; Parampil, Sindu Raj; Alexandre Charantonis, Anastase

    2017-12-01

    In this article, we present the first climatological map of air-sea CO2 flux over the Baltic Sea based on remote sensing data: estimates of pCO2 derived from satellite imaging using self-organizing map classifications along with class-specific linear regressions (SOMLO methodology) and remotely sensed wind estimates. The estimates have a spatial resolution of 4 km both in latitude and longitude and a monthly temporal resolution from 1998 to 2011. The CO2 fluxes are estimated using two types of wind products, i.e. reanalysis winds and satellite wind products, the higher-resolution wind product generally leading to higher-amplitude flux estimations. Furthermore, the CO2 fluxes were also estimated using two methods: the method of Wanninkhof et al. (2013) and the method of Rutgersson and Smedman (2009). The seasonal variation in fluxes reflects the seasonal variation in pCO2 unvaryingly over the whole Baltic Sea, with high winter CO2 emissions and high pCO2 uptakes. All basins act as a source for the atmosphere, with a higher degree of emission in the southern regions (mean source of 1.6 mmol m-2 d-1 for the South Basin and 0.9 for the Central Basin) than in the northern regions (mean source of 0.1 mmol m-2 d-1) and the coastal areas act as a larger sink (annual uptake of -4.2 mmol m-2 d-1) than does the open sea (-4 mmol m-2 d-1). In its entirety, the Baltic Sea acts as a small source of 1.2 mmol m-2 d-1 on average and this annual uptake has increased from 1998 to 2012.

  4. Rock encrusting assemblages: Structure and distribution along the Baltic Sea

    Science.gov (United States)

    Grabowska, Monika; Grzelak, Katarzyna; Kukliński, Piotr

    2015-09-01

    Aquatic community structure and dynamics are generally controlled by a variety of biological and physical factors. Among these factors in marine ecosystems, salinity is known to have a significant effect on species occurrence and composition. In this study, we investigated the large-scale distribution and abundance of encrusting fauna along a salinity gradient on the shallow Baltic Sea rocky coast. Rock samples collected from 14 locations distributed between the Gulf of Bothnia (salinity 0.6) and Skagerrak (salinity 28) supported a total number of 24 encrusting species. The faunas were composed mostly of marine species with opportunistic life histories; however, some brackish water specialists were also present. The number of species and abundance counts is strongly positively correlated with increases in salinity. No encrusting faunas were recorded below salinity level 4. Multivariate analysis (nMDS) revealed three major groups based on species composition that differed in terms of abundance and number of species. Each group was associated with specific salinity conditions. The first assemblage type occurred within salinity 4-7, the second within salinity between 22 and 27, and the third type was a mixture between the two observed at a salinity of approximately 17. This study indicates that to determine the assemblage structure of the Baltic Sea encrusting fauna, analyses at the family level were found to be a reliable surrogate for species composition.

  5. Fish, fishing, and pollutant reduction in the Baltic Sea.

    Science.gov (United States)

    Mackenzie, Brian R; Almesjö, Lisa; Hansson, Sture

    2004-04-01

    The Baltic Sea is heavily polluted yet supports major commercial fisheries for cod (Gadus morhua), herring (Clupea harengus), and sprat (Sprattus sprattus). Emissions of persistent organic pollutants, such as polychlorinated biphenyls (PCBs) and DDT, were high during the 1960s and 1970s, and concentrations in fish and other fauna are still significant. Several models of the fluxes of these pollutants among the water, sediment, and atmosphere have been developed, but these generally omit the roles of fish and fisheries. We show that the standing stock of the most abundant fish species in the Baltic Sea was a sink for 260 kg of PCBs in the late 1980s to early 1990s and that the fishery removed as much or more PCB (31 kg yr(-1))than other budget components (e.g., degradation in the water column). Accounting for fish and fisheries could increase our understanding of the fluxes of pollutants, and banning the discard of highly contaminated organs such as cod liver could be part of the pollution management.

  6. Distribution and activity of petroleum hydrocarbon degrading bacteria in the North Sea and Baltic Sea

    International Nuclear Information System (INIS)

    Bruns, K.; Dahlmann, G.; Gunkel, W.

    1993-01-01

    Data were collected in 1988 and 1989 on the distribution and activity of petroleum hydrocarbon degrading bacteria in the North Sea and Baltic Sea. Crude oil degrading bacteria and the number of bacteria which in particular degrade naphthalene were quantified using a modified dilution method (MPN). Crude oil degrading bacteria were present in all of about 100 water samples, with as many as 10 3 ml -1 in some samples. Numbers of naphthalene degrading bacteria were at least tenfold lower. There is obviously a greater connection between this bacteria group and petroleum hydrocarbon (PHC) contamination than between the more nonspecific group of crude oil degrading bacteria and PHC contamination. Data from the North Sea show an extremely high abundance of hydrocarbon degrading bacteria, even in winter, while in the southern Baltic Sea low numbers of bacteria were found and slower crude oil degradation was observed. (orig.)

  7. The geological history of the Baltic Sea. A review of the literature and investigation tools

    International Nuclear Information System (INIS)

    Beckholmen, Monica; Tiren, Sven A.

    2009-09-01

    in the Neoproterozoic-Palaeozoic. A recent change in the stress regime and Pleistocene subsidence together with erosion has given us the present Baltic Basin. The history of the Baltic Sea region is described with reference to illustrations in the reviewed literature and investigation methods with examples are given in an Appendix

  8. The geological history of the Baltic Sea. A review of the literature and investigation tools

    Energy Technology Data Exchange (ETDEWEB)

    Beckholmen, Monica; Tiren, Sven A. (Geosigma AB, Uppsala (Sweden))

    2009-09-15

    in the Neoproterozoic-Palaeozoic. A recent change in the stress regime and Pleistocene subsidence together with erosion has given us the present Baltic Basin. The history of the Baltic Sea region is described with reference to illustrations in the reviewed literature and investigation methods with examples are given in an Appendix

  9. Finnish studies on radioactivity in the Baltic Sea in 1987

    International Nuclear Information System (INIS)

    Ikaeheimonen, T.K.; Ilus, E.; Saxen, R.

    1988-05-01

    Monitoring of radioactive substances in the Baltic Sea was continued within the framework of the Finnish national monitoring programme. The only regularly detected gamma nuclides in sea water were 40 K, 134 Cs and 137 Cs. The ratio 134 Cs/ 137 Cs in surface water samples was 0.36+-0.01. The activity concentrations of 137 Cs have became more evenly distributed during the last year, so that in the surface water of the Baltic Proper the values were 100-200 Bq m -3 , in the Gulf of Finland 200-300 Bq m -3 , in the Bothnian Sea 300-400 Bq m -3 and in the Bothnian Bay about 100 Bq m -3 in 1987. The sedimentation of the Chernobyl fallout into the bottom sediments of the open sea basins only began to increase in 1987. The addition of 137 Cs and other fallout nuclides was strongest at the XV 1 station in the eastern part of the Gulf of Finland, where the total deposition of 137 Cs was about 18 kBq m -3 during the last year. No areal differences were found in the fish samples caught from the coastal waters of Finland in 1987. In pike and cod the 137 Cs values have slightly increased since 1986, being now about five times (15-30 Bq kg -1 fresh weight) the values before the Chernobyl accident. The activity concentrations of 90 Sr (0.030-0.11 Bq kg -1 fresh weight) were at the same level as in 1985 and the preceding years

  10. Regional differences in semen qualities in the Baltic region.

    Science.gov (United States)

    Punab, Margus; Zilaitiene, Birute; Jørgensen, Niels; Horte, Antero; Matulevicius, Valentinas; Peetsalu, Ants; Skakkebaek, Niels E

    2002-08-01

    Recent prospective studies of male reproductive health have shown differences between several European countries. Our objective was to evaluate the current situation in the two Baltic States Estonia and Lithuania. In 1997-99 we investigated semen parameters, levels of reproductive hormones and general health factors of 196 men from the general population in Lithuania; from Estonia, 79 men from the general population and 118 soldiers were investigated. Adjusted for interlaboratory differences and abstinence period, sperm concentration of Lithuanian and Estonian men from the general populations were shown to be 55 and 67 million/mL, respectively. The Estonian soldiers had the highest sperm concentration, 82 million/mL. The frequencies of morphologically normal spermatozoa were 6.2, 7.7 and 9.6%, respectively. In contrast to the semen qualities, highest Inhibin B levels were detected in the Lithuanians (233 pg/mL) followed by Estonian men from the general population (220 pg/mL) and Estonian soldiers (185 pg/mL). The soldiers had also the lowest level of testosterone and oestradiol. The sperm counts of the Estonian and Lithuanian men investigated here are higher than recently shown for Norwegian, Danish, Estonian and Finnish men. Comparisons should be cautiously drawn as the groups are not completely comparable. Still, even within the Baltic region, geographically close and sharing common recent social history, differences in semen quality and levels of reproductive hormones are apparent.

  11. Marine environment protection for the North and Baltic Seas. Special Report - February 2004

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    The marine environment of the North Sea and Baltic Sea is still heavily polluted. The marine ecosystems are under severe stress from overfishing, water pollution, raw materials production and tourism. Environmental protection in this region necessitates decisive political initiatives and strict corrections especially in fishery policy, agricultural policy and chemical substances control. This is the balance of the special expert opinion of the Council of Environmental Experts. The publication specifies the main problem areas, the current pollution situation, the fields where action is most urgently required - especially in fishery, chemical substances, agricultural and sea travel policies - and presents suggestions for an integrated European and national marine protection policy including a regional development concept for the marine environment. (orig.)

  12. Multi-Layered Stratification in the Baltic Sea: Insight from a Modeling Study with Reference to Environmental Conditions

    Directory of Open Access Journals (Sweden)

    Bijan Dargahi

    2017-01-01

    Full Text Available The hydrodynamic and transport characteristics of the Baltic Sea in the period 2000–2009 were studied using a fully calibrated and validated 3D hydrodynamic model with a horizontal resolution of 4.8 km. This study provided new insight into the type and dynamics of vertical structure in the Baltic Sea, not considered in previous studies. Thermal and salinity stratification are both addressed, with a focus on the structural properties of the layers. The detection of cooler regions (dicothermal within the layer structure is an important finding. The detailed investigation of thermal stratification for a 10-year period (i.e., 2000–2009 revealed some new features. A multilayered structure that contains several thermocline and dicothermal layers was identified from this study. Statistical analysis of the simulation results made it possible to derive the mean thermal stratification properties, expressed as mean temperatures and the normalized layer thicknesses. The three-layered model proposed by previous investigators appears to be valid only during the winter periods; for other periods, a multi-layered structure with more than five layers has been identified during this investigation. This study provides detailed insight into thermal and salinity stratification in the Baltic Sea during a recent decade that can be used as a basis for diverse environmental assessments. It extends previous studies on stratification in the Baltic Sea regarding both the extent and the nature of stratification.

  13. Contribution of atmospheric circulation to recent off-shore sea-level variations in the Baltic Sea and the North Sea

    Science.gov (United States)

    Karabil, Sitar; Zorita, Eduardo; Hünicke, Birgit

    2018-01-01

    The main purpose of this study is to quantify the contribution of atmospheric factors to recent off-shore sea-level variability in the Baltic Sea and the North Sea on interannual timescales. For this purpose, we statistically analysed sea-level records from tide gauges and satellite altimetry and several climatic data sets covering the last century. Previous studies had concluded that the North Atlantic Oscillation (NAO) is the main pattern of atmospheric variability affecting sea level in the Baltic Sea and the North Sea in wintertime. However, we identify a different atmospheric circulation pattern that is more closely connected to sea-level variability than the NAO. This circulation pattern displays a link to sea level that remains stable through the 20th century, in contrast to the much more variable link between sea level and the NAO. We denote this atmospheric variability mode as the Baltic Sea and North Sea Oscillation (BANOS) index. The sea-level pressure (SLP) BANOS pattern displays an SLP dipole with centres of action located over (5° W, 45° N) and (20° E, 70° N) and this is distinct from the standard NAO SLP pattern in wintertime. In summertime, the discrepancy between the SLP BANOS and NAO patterns becomes clearer, with centres of action of the former located over (30° E, 45° N) and (20° E, 60° N). This index has a stronger connection to off-shore sea-level variability in the study area than the NAO in wintertime for the period 1993-2013, explaining locally up to 90 % of the interannual sea-level variance in winter and up to 79 % in summer. The eastern part of the Gulf of Finland is the area where the BANOS index is most sensitive to sea level in wintertime, whereas the Gulf of Riga is the most sensitive region in summertime. In the North Sea region, the maximum sea-level sensitivity to the BANOS pattern is located in the German Bight for both winter and summer seasons. We investigated, and when possible quantified, the contribution of several

  14. Spatio-temporal distribution and production of calanoid copepods in the central Baltic Sea

    DEFF Research Database (Denmark)

    Hansen, F.C.; Möllmann, Christian; Schutz, U.

    2006-01-01

    The aim of our study was the exploration of species-specific distribution and production patterns of dominant copepods in the Central Baltic Sea (Bornholm Basin). Spatio-temporal distribution, egg and secondary production were studied by means of net-sampling and egg production experiments from....... In contrast, the C4-5 and C6 of Pseudocalanus spp. preferentially inhabited the halocline region (50-70 m) and the deep central part of the area. Observed differences in horizontal distribution among these three copepods appear to result from different depth preferences and depth-dependent water circulation...

  15. Temporal development of coastal ecosystems in the Baltic Sea over the past two decades

    DEFF Research Database (Denmark)

    Olsson, Jens; Tomczak, Maciej; Ojaveer, Henn

    2015-01-01

    of the development over time in 13 coastal ecosystems in the Baltic Sea region during the past two decades. The study covers between two to six trophic levels per system and time-series dating back to the early 1990s. We applied multivariate analyses to assess the temporal development of biological ecosystem...... components and relate these to potential driving variables associated with changes in climate, hydrology, nutrient status, and fishing pressure. Our results show that structural change often occurred with similar timing in the assessed coastal systems. Moreover, in 10 of the 13 systems, a directional...

  16. Temporal development of coastal ecosystems in the Baltic Sea - an assessment of patterns and trends

    DEFF Research Database (Denmark)

    Olsson, Jens; Bergström, Lena; Tomczak, Maciej

    2014-01-01

    in the north, covers between two to five trophic levels per area, and include time series dating back to the early 1990s. Using multivariate analyses, we assess the temporal development of species abundance or biomass at different trophic levels in relation to the development of variables related to local...... and regional climate, hydrology, nutrient loading and fishing pressure. Our results highlight the relative timing of change in ecosystem structure and the development of key biological elements across areas. Besides describing the temporal development of coastal ecosystems in the Baltic Sea during the past two...

  17. Hydrodynamic modelling in the Polish Zone of the Baltic Sea - an overview of Polish achievements

    Directory of Open Access Journals (Sweden)

    Ewa Jasińska

    2003-03-01

    Full Text Available This paper gives a general overview of Polish experience and achievements with regard to hydrodynamic modelling in the Polish zone of the Baltic Sea. The first work started already at the end of the sixties when the first 1D and 2D hydrodynamic models were set up. With the development of numerical methods and increasing computational power a number of 1D, 2D and 3D models were set up and tested. Global, regional and local models cover the most important water bodies,i.e. the Pomeranian Bay - Szczecin Lagoon and Gulf of Gdansk - Vistula Lagoon systems.

  18. Evaluation and selection of test methods for assessment of contaminated sediments in the Baltic Sea

    DEFF Research Database (Denmark)

    Lehtonen, Kari; Ahvo, Aino; Berezina, Nadya

    a set of pilot experiments, which were performed by the participating laboratories. Chemical analysis of the contaminated harbour sediment chosen as the test matrix confirmed the presence of high concentrations of polycyclic aromatic hydrocarbons, organotins and trace metals, and the sediment......The purpose of the CONTEST project (2014-15) is to test, develop, evaluate and select suitable biological methods to be applied in the quantitative and qualitative assessment of toxicity of anthropogenically contaminated sediments in the Baltic Sea marine region. Here is presented results from...

  19. Has eutrophication promoted forage fish production in the Baltic Sea?

    DEFF Research Database (Denmark)

    Eero, Margit; Andersson, Helén C; Almroth-Rosell, Elin

    2016-01-01

    and concurrent fish production can provide useful insights to this question. In this paper, we investigate to what extent a multi-fold increase in nutrient loads from the 1950s to 1980s enhanced forage fish production in the Baltic Sea. We use monitoring data on fish stock dynamics covering the period......Reducing anthropogenic nutrient inputs is a major policy goal for restoring good environmental status of coastal marine ecosystems. However, it is unclear to what extent reducing nutrients would also lower fish production and fisheries yields. Empirical examples of changes in nutrient loads...... of the nutrient increase, combined with nutrient concentrations from a 3-dimensional coupled physical-biogeochemical ocean model. The results suggest that nutrient enrichment enhanced the biomass level of forage fish by up to 50 % in some years and areas due to increased body weight of fish. However, the trends...

  20. Could seals prevent cod recovery in the Baltic Sea?

    DEFF Research Database (Denmark)

    MacKenzie, Brian; Eero, Margit; Ojaveer, Henn

    2011-01-01

    Fish populations are increasingly affected by multiple human and natural impacts including exploitation, eutrophication, habitat alteration and climate change. As a result many collapsed populations may have to recover in ecosystems whose structure and functioning differ from those in which...... they were formerly productive and supported sustainable fisheries. Here we investigate how a cod (Gadus morhua) population in the Baltic Sea whose biomass was reduced due to a combination of high exploitation and deteriorating environmental conditions might recover and develop in the 21st century...... in an ecosystem that likely will change due to both the already started recovery of a cod predator, the grey seal Halichoerus grypus, and projected climate impacts. Simulation modelling, assuming increased seal predation, fishing levels consistent with management plan targets and stable salinity, shows...

  1. Clustering in Engineering Education in the Baltic Region

    Science.gov (United States)

    Ahrens, Andreas; Zascerinska, Jelena

    2011-01-01

    The contemporary situation in the Baltic region, namely, the lack of working places due to the structural problems, a high unemployment rate, the migration of highly qualified people and the low rate of self-employees, demands on innovation as an engine of the economic development with a strong impact on sustainable development in the European…

  2. Baltic Sea Experiment (BALTEX) Ground-Based Radar Polar Volume Data, Version 1

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set includes non-Doppler polar volume reflectivity data from the Baltic Sea Experiment (BALTEX). Data were collected on Sweden's Gotland Island, using an...

  3. Long-term temporal and spatial trends in eutrophication status of the Baltic Sea

    DEFF Research Database (Denmark)

    Andersen, Jesper; Carstensen, Jacob; Conley, Daniel J.

    2017-01-01

    Much of the Baltic Sea is currently classified as ‘affected by eutrophication’. The causes for this are twofold. First, current levels of nutrient inputs (nitrogen and phosphorus) from human activities exceed the natural processing capacity with an accumulation of nutrients in the Baltic Sea over...... report on the temporal and spatial trends of eutrophication status for the open Baltic Sea over a 112-year period using the HELCOM Eutrophication Assessment Tool (HEAT 3.0). Further, we analyse variation in the confidence of the eutrophication status assessment based on a systematic quantitative approach...... using coefficients of variation in the observations. The classifications in our assessment indicate that the first signs of eutrophication emerged in the mid-1950s and the central parts of the Baltic Sea changed from being unaffected by eutrophication to being affected.We document improvements...

  4. Baltic Sea Experiment (BALTEX) Ground-Based Radar Polar Volume Data

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set includes non-Doppler polar volume reflectivity data from the Baltic Sea Experiment (BALTEX). Data were collected on Sweden's Gotland Island, using an...

  5. [Perceptions of Loss, Decline and Doom in the Baltic Sea - Untergangsvorstellungen im Ostseeraum] / David Feest

    Index Scriptorium Estoniae

    Feest, David, 1969-

    2011-01-01

    Arvustus : Perceptions of Loss, Decline and Doom in the Baltic Sea - Untergangsvorstellungen im Ostseeraum. Berlin : Berliner Wissenschafts-Verlag, 2004. (Die Ostseeregione: Nördliche Dimensionen - Europäische Perspektiven. 1)

  6. Seasonal contribution of terrestrial organic matter and biological oxygen demand to the Baltic Sea from three contrasting river catchments

    Science.gov (United States)

    Reader, H. E.; Stedmon, C. A.; Kritzberg, E. S.

    2014-06-01

    To examine the potential influence of terrestrially derived DOM on the Baltic Sea, a year-long study of dissolved organic matter (DOM) was performed in three river catchments in Sweden. One catchment drains into the Bothnian Sea, while two southern catchments drain into the Baltic proper. Dissolved organic carbon (DOC) concentrations were positively correlated with discharge from forested catchments over the year. While the overall concentrations of DOC were several times higher in the southern two catchments, higher discharge in the northern catchment resulted in the annual loadings of DOC being on the same order of magnitude for all three catchments. Biological oxygen demand (BOD) was used as a proxy for the lability of carbon in the system. The range of BOD values was similar for all three catchments, however, the ratio of BOD to DOC (an indication of the labile fraction) in Ume river was four times higher than in the southern two catchments. Total annual BOD loading to the Baltic Sea was twice as high in the northern catchment than in the two southern catchments. Lower winter temperatures and preservation of organic matter in the northern catchment combined with an intense spring flood help to explain the higher concentrations of labile carbon in the northern catchment. Lower lability of DOM as well as higher colour in the southern catchments suggest that wetlands (i.e. peat bogs) may be the dominant source of DOM in these catchments, particularly in periods of low flow. With climate change expected to increase precipitation events and temperatures across the region, the supply and quality of DOM delivered to the Baltic Sea can also be expected to change. Our results indicate that DOM supply to the Baltic Sea from boreal rivers will be more stable throughout the year, and potentially have a lower bioavailability.

  7. The main environmental problems of the Baltic Sea and the ways to solve them

    Directory of Open Access Journals (Sweden)

    Mosin Oleg

    2011-03-01

    Full Text Available The Baltic Sea is a unique ecological system, an integral part of the global ecological system, which is in urgent need of protection from destructive anthropogenic impact stemming from the production and consumption of nuclear energy and artificial radionuclides, agriculture, oil and oil product transportation, and sewage and solid waste treatment. The article outlines the main environmental problems of the Baltic Seas and the ways to solve them.

  8. The main environmental problems of the Baltic Sea and the ways to solve them

    OpenAIRE

    Mosin Oleg

    2011-01-01

    The Baltic Sea is a unique ecological system, an integral part of the global ecological system, which is in urgent need of protection from destructive anthropogenic impact stemming from the production and consumption of nuclear energy and artificial radionuclides, agriculture, oil and oil product transportation, and sewage and solid waste treatment. The article outlines the main environmental problems of the Baltic Seas and the ways to solve them.

  9. Distribution patterns of epilithic diatoms along climatic, spatial and physicochemical variables in the Baltic Sea

    OpenAIRE

    Virta, Leena; Soininen, Janne

    2017-01-01

    Abstract The species richness and community composition of the diatom communities were studied in the Baltic Sea, Northern Europe, to enhance knowledge about the diversity of these organisms in a brackish water ecosystem. Many organisms in the Baltic Sea have been studied extensively, but studies investigating littoral diatoms are scarce. The goal of this study was to examine the importance of climatic, spatial and water physicochemical variables as drivers of epilithic diato...

  10. Contracaecum osculatum and other anisakid nematodes in grey seals and cod in the Baltic Sea

    DEFF Research Database (Denmark)

    Zuo, S; Kania, P W; Mehrdana, F

    2018-01-01

    anisakid nematodes Pseudoterranova decipiens and Anisakis simplex are also found in both seals and cod in the Baltic Sea, but at much lower rates. The Baltic grey seal population was left at a critically low level (comprising a few hundred individuals) during the latter part of the 20th century, but since......Populations of grey seals (Halichoerus grypus), sprats (Sprattus sprattus) and cod (Gadus morhua) in the Baltic Sea are relatively stationary. The present work, applying classical and molecular helminthological techniques, documents that seals and cod also share a common parasite, the anisakid...

  11. Large-scale environmental effects and ecological processes in the Baltic Sea

    International Nuclear Information System (INIS)

    Wulff, F.

    1990-11-01

    A Swedish research programme concerning the Baltic Sea is initiated by the SNV to produce budgets and models of eutrophying substances (nitrogen, phosphorus, silicate, some organic substances) and toxic substances (PCB, lindane and PAH). A description of the distribution and turnover of these substances including their transformation will be necessary in the evaluation of critical processes controlling concentrations in relation to external load. A geographical information system will be made available as a database and analytical tool for all participants (BED, Baltic Ecosystem Data). This project is designed around cooperation between the Baltic Sea countries. (au)

  12. Impact of accelerated future global mean sea level rise on hypoxia in the Baltic Sea

    Science.gov (United States)

    Meier, H. E. M.; Höglund, A.; Eilola, K.; Almroth-Rosell, E.

    2017-07-01

    Expanding hypoxia is today a major threat for many coastal seas around the world and disentangling its drivers is a large challenge for interdisciplinary research. Using a coupled physical-biogeochemical model we estimate the impact of past and accelerated future global mean sea level rise (GSLR) upon water exchange and oxygen conditions in a semi-enclosed, shallow sea. As a study site, the Baltic Sea was chosen that suffers today from eutrophication and from dead bottom zones due to (1) excessive nutrient loads from land, (2) limited water exchange with the world ocean and (3) perhaps other drivers like global warming. We show from model simulations for the period 1850-2008 that the impacts of past GSLR on the marine ecosystem were relatively small. If we assume for the end of the twenty-first century a GSLR of +0.5 m relative to today's mean sea level, the impact on the marine ecosystem may still be small. Such a GSLR corresponds approximately to the projected ensemble-mean value reported by the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. However, we conclude that GSLR should be considered in future high-end projections (>+1 m) for the Baltic Sea and other coastal seas with similar hydrographical conditions as in the Baltic because GSLR may lead to reinforced saltwater inflows causing higher salinity and increased vertical stratification compared to present-day conditions. Contrary to intuition, reinforced ventilation of the deep water does not lead to overall improved oxygen conditions but causes instead expanded dead bottom areas accompanied with increased internal phosphorus loads from the sediments and increased risk for cyanobacteria blooms.

  13. Phosphorus recycling and burial in Baltic Sea sediments with contrasting redox conditions

    DEFF Research Database (Denmark)

    Mort, Haydon P; Slomp, Caroline P; Gustafson, Bo G

    2010-01-01

    . Most burial of P takes place as organic P. We find no evidence for significant authigenic Ca–P formation or biogenic Ca–P burial. The lack of major inorganic P burial sinks makes the Baltic Sea very sensitive to the feedback loop between increased hypoxia, enhanced regeneration of P and increased......In this study, redox-dependent phosphorus (P) recycling and burial at 6 sites in the Baltic Sea is investigated using a combination of porewater and sediment analyses and sediment age dating (210Pb and 137Cs). We focus on sites in the Kattegat, Danish Straits and Baltic Proper where present...... be accounted for in budgets and models for the Baltic Sea....

  14. A more accurate formula for calculating the net longwave radiation flux in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Tomasz Zapadka

    2007-12-01

    Full Text Available A new, more accurate formula for calculating the net longwave radiation fluxLW ↑↓ has been devised for the Baltic Sea region. To this end,the following sets of simultaneously measured data regarding the longwave radiation of the sea andthe atmosphere were used: the temperatures of the sea surface and its contiguous air layer,the water vapour pressure in the air above the water, and the cloud cover.These data were gathered during numerous research cruises in the Baltic in 2000-03 and were supplemented by satellitedata from Karlsson (2001 characterising the cloud cover over the whole Baltic. The formulaestablished for LW ↑↓ can be written in the form of three alternative equations,differing with respect to their cloud cover functions:LW ↑↓ =0.985σT4s - σT4a (0.685+0.00452e{(1 + d n2 average for all cloud types (Z1(1 + din2 separately for low-, mid- and high-level clouds (Z2(1 + dinϒi separately for low-, mid- and high-level clouds (Z3where σ - Stefan-Boltzmann constant; Ts - sea surface temperature [K]; Ta - air temperature [K]; e - water vapour pressure [mbar]; n - total cloud amount [0 - 1]; d - mean empirical dimensionless coefficient, determined for all cloud types or for particular months (see Tables 3 and 4; da - empirical coefficient determined for the quadratic function: d1 = 0.39 for low-level clouds, d2 = 0.305 for mid-level clouds, d3 = 0.22 for high-level clouds; di - empirical coefficient determined as follows: d1 = 0.39 for low-level clouds when γ1 = 1.3, d2 = 0.29 for mid-level clouds when γ2 = 1.1; d3 = 0.17 for high-level clouds when γ3 = 0.96. The improved accuracy of this formula (RMSE ≅ 10 W m-2 is due chiefly to the establishment of functions and coefficients characterising the cloud cover over the Baltic in particular months of the year and their incorporation into it.

  15. Survey of transportation of liquid bulk chemicals in the Baltic Sea

    Energy Technology Data Exchange (ETDEWEB)

    Posti, A.; Hakkinen, J.

    2012-07-01

    This study is made as a part of the Chembaltic (Risks of Maritime Transportation of Chemicals in Baltic Sea) project which gathers information on the chemicals transported in the Baltic Sea. The purpose of this study is to provide an overview of handling volumes of liquid bulk chemicals (including liquefied gases) in the Baltic Sea ports and to find out what the most transported liquid bulk chemicals in the Baltic Sea are. Oil and oil products are also viewed in this study but only in a general level. Oils and oil products may also include chemical-related substances (e.g. certain bio-fuels which belong to MARPOL annex II category) in some cargo statistics. Chemicals in packaged form are excluded from the study. Most of the facts about the transport volumes of chemicals presented in this study are based on secondary written sources of Scandinavian, Russian, Baltic and international origin. Furthermore, statistical sources, academic journals, periodicals, newspapers and in later years also different homepages on the Internet have been used as sources of information. Chemical handling volumes in Finnish ports were examined in more detail by using a nationwide vessel traffic system called PortNet. Many previous studies have shown that the Baltic Sea ports are annually handling more than 11 million tonnes of liquid chemicals transported in bulk. Based on this study, it appears that the number may be even higher. The liquid bulk chemicals account for approximately 4 % of the total amount of liquid bulk cargoes handled in the Baltic Sea ports. Most of the liquid bulk chemicals are handled in Finnish and Swedish ports and their proportion of all liquid chemicals handled in the Baltic Sea is altogether over 50 %. The most handled chemicals in the Baltic Sea ports are methanol, sodium hydroxide solution, ammonia, sulphuric and phosphoric acid, pentanes, aromatic free solvents, xylenes, methyl tert-butyl ether (MTBE) and ethanol and ethanol solutions. All of these chemicals

  16. Iron cycling microbial communities in sediments of the Baltic Sea

    Science.gov (United States)

    Reyes, Carolina; Delwig, Olaf; Noriega-Ortega, Beatriz; Dähnke, Kirstin; Böttcher, Michael E.; Friedrich, Michael W.

    2014-05-01

    The biogeochemical cycling of iron is a key early diagenetic process. However, limited information exists about the diversity and metabolic pathways of microorganisms linked to iron cycling in marine sediments. The goal of this study was to determine the bacterial community diversity in sediments showing ongoing dissimilatory iron reduction using 454-pyrosequencing as a first step in characterizing microorganisms potentially involved in iron reduction. For this purpose, two 35 cm cores were sampled from ferruginous sediments in the Skagerrak (SK) and the Bothnian Bay (BB) from the North-Sea Baltic Sea and the northern Baltic Sea respectively. Pore water profiles showed Fe2+ and Mn2+ levels of ~140-150 µM throughout the core below a 6 cm thick oxidized surface layer in SK sediments and ~300 µM below a 2 cm thick surface layer in BB sediments. Dissolved sulphide levels were below detection in both sediments. No significant depletion of SO42- occurred at both sites, further supported by stable S and O isotope analyses of dissolved sulfate at SK site. Only very minor net sulfate reduction is suggested here from the trend in sulphur isotope signatures, in agreement with previously reported gross microbial sulphate rate measurements (Canfield et al., 1993;GCA). Based on these biogeochemical constraints, Fe reduction in the studied sediments is therefore dominated by microbial dissimilatory iron reduction, while cryptic Fe-S-cycling can be largely excluded. 16S rRNA gene sequences indicate Proteobacteria as the dominating microbial group in these sediments. Potential iron and manganese reducing bacteria included Geobacteraceae, Pelobacteraceae, Shewanellaceae, and Oceanospirillales. Additionally, Actinobacteria and Bacteroidetes were present. Also, Fe-oxidizers were present and their occurrence correlated in depth with a Fe-oxide-rich layer, most likely a former buried Fe-oxidation front. Gene sequences point to the presence of Mariprofundus in SK sediments and

  17. What we know about the Baltic Sea: a summary of BSSC 2005

    Directory of Open Access Journals (Sweden)

    Szymon Uścinowicz

    2006-06-01

    Full Text Available Introduction    The Baltic Sea, an internal sea of the European Community, isone of the largest brackish water bodies in the world. It isquite unique in many respects, particularly in its natural featuresand in the cultural, political and socio-economic patterns ofthe countries bordering it.    After nearly 40 years, during which Baltic marine physicists,chemists, biologists and geologists had been holding separatescientific meetings, it was decided the time was ripe to arrangejoint scientific conferences with the purpose of getting togetherto discuss general and specific aspects of the Baltic Sea, toexchange information, to integrate efforts, and to get to knowand understand each other better. The Sopot 2005 Congress, precededby the Baltic Sea Science Congresses in Rønne (1997, Warnemünde(1999, Stockholm (2001 and Helsinki (2003, was the fifth jointmeeting of the Conference of Baltic Oceanographers (CBO, BalticMarine Biologists (BMB and Baltic Sea Geologists (BSG. Likeall the previous congresses, the one held in Sopot bore witnessto the idea that we all, members of CBO, BMB and BSG, shouldcontinue to work together even more closely.    The meeting in Sopot instigated discussion on a broad spectrumof problems, from large-scale climate change-related processesto local, small-scale specific Baltic Sea features. Further subjectsfor deliberation included modelling as a research tool and asa way of providing services and forecasting certain phenomena,operational oceanography, and man's impact on the Baltic Seaenvironment and its resources.    We are indebted to our Scientific Committee for their work duringthe past months to sort out and select interesting contributionsto all the oral and poster sessions, and thus for making theCongress an attractive and quality event. We also thank the PolishAcademy of Sciences and the City of Sopot for their financialsupport.    We hope that the joint Congress and fruitful scientific

  18. Denitrification in sediments as a major nitrogen sink in the Baltic Sea: an extrapolation using sediment characteristics

    Directory of Open Access Journals (Sweden)

    B. Deutsch

    2010-10-01

    Full Text Available Rates of denitrification in sediments were measured with the isotope pairing technique at different sites in the southern and central Baltic Sea. The rates varied between 0.5 μmol N m−2 h−1 in sands and 28.7 μmol N m−2 h−1 in muddy sediments and showed a good correlation to the organic carbon contents of the surface sediments. N-removal rates via sedimentary denitrification were estimated for the entire Baltic Sea calculating sediment specific denitrification rates and interpolating them to the whole Baltic Sea area. Another approach was carried out by using the relationship between the organic carbon content and the rate of denitrification. The N-removal by denitrification in sediments varied between 426–652 kt N a−1, which is around 48–73% of the external N inputs delivered via rivers, coastal point sources, and atmospheric deposition. Moreover, an expansion of the anoxic bottom areas was considered under the assumption of a rising oxycline from 100 to 80 m water depth. This leads to an increase of the area with anoxic conditions and an overall decrease in sedimentary denitrification by 14%. Overall, we show here that this type of data extrapolation is a powerful tool to estimate the nitrogen losses for a whole coastal sea and may be applicable to other coastal regions and enclosed seas.

  19. [Baltic connections : archival guide to the maritime relations of the countries around the Baltic Sea (including the Netherlands) 1450-1800)] / Enn Küng

    Index Scriptorium Estoniae

    Küng, Enn

    2009-01-01

    Arvustus: Baltic connections : archival guide to the maritime relations of the countries around the Baltic Sea (including the Netherlands) 1450-1800). Leiden, Boston : Brill, 2007. Lisaks raamatule on arhiivijuht kättesaadav ka elektrooniliselt http://www.balticconnections.net/

  20. Risk and environmental impact assessments for the decommissioning of radioisotope thermoelectric generators (RTGs) around the Baltic Sea area

    International Nuclear Information System (INIS)

    2009-01-01

    The removal and safe disposal of RTGs and their replacement with solar panel technology in the Baltic Sea is a priority area under the Norwegian Nuclear Action Plan. 26 of the 87 RTGs around the Baltic Sea have been removed as of 7th October 2009. The removal of RTGs around the Baltic Sea was initiated in 2009 as part of the Norwegian-Russian cooperation with funding from Norway, which requires that risk and environmental impact assessments are carried out during the planning phase. Finland and France will also be contributing to the work of removal and safe disposal of the RTGs around the Baltic Sea. (Author)

  1. Public preferences regarding use and condition of the Baltic Sea – an international comparison informing marine policy

    DEFF Research Database (Denmark)

    Ahtiainen, Heini; Artell, Jane; Czajkowski, Mikolaj

    2013-01-01

    set obtained from a coordinated survey across all nine littoral countries, we examine the recreational use and perceptions towards the Baltic Sea. Our findings suggest that the Baltic Sea is an important recreation area for residents of the littoral states, as the majority of people spend leisure time...... to improving the state of the Baltic Sea. For future research, we propose a similar large-scale, coordinated study across all nine littoral countries using state-of-the art valuation methods to assess the monetary benefits of improving the state of the Baltic Sea....

  2. Oceanographic influences on the distribution of Baltic cod, Gadus morhua , during spawning in the Bornholm Basin of the Baltic Sea

    DEFF Research Database (Denmark)

    Tomkiewicz, Jonna; Lehmann, K.M.; St. John, Michael

    1998-01-01

    the vertical and horizontal distribution of adult cod. Abundance of immature cod was also positively related to decreasing bottom depths. The effect of temperature was minor. The observed size- and sex-dependent spawning aggregation patterns, in association with habitat volume and stock size, may influence cod......The Baltic Sea is a stratified, semi-enclosed sea typified by a low-salinity surface layer and a deep saline layer of varying volume, salinity, temperature and oxygen concentration. The relationships between these oceanographic factors and the distribution of Baltic cod are presented, utilizing...... results from a survey carried out during the 1995 spawning period in the Bornholm Basin, at present the main spawning area of this stock. Cod distribution, abundance and population structure were estimated from hydroacoustic and trawl data and related to hydrographic parameters as well as to bottom depth...

  3. Radiological investigations in the western Baltic Sea including Kattegat during the years 1975 to 1980

    International Nuclear Information System (INIS)

    Kautsky, H.

    1981-01-01

    During the years 1975 to 1980 measurements of the actitivity concentrations of 137 Cs and 90 Sr in the water of the Kattegat and the western Baltic were carried out by the Deutsches Hydrographisches Institut. From these observations it can be clearly seen that the main activity concentration of 137 Cs occurs in the deeper water layers in particular those of the eastern Kattegat and north of the Sound. This water of higher salinity originates from the North Sea and flows through the Kattegat into the Baltic. Higher activity concentration values up to 1.1 pCi/l were found in 1980 only in the region north of the Kiel Bight. These values can be explained by an inflow of water through the Great Belt, where values of up to 2.2 pCi/l were found in the deep water. In March 1980 a value of 3.10 pCi/l was found in the deep water of the Sound. Nevertheless, the activity concentrations in the deep water layers in the Baltic region south of the Sound are not higher than those of the surface water. In this region surface water und deep water have comparable salinity values. In 1980 up to 0.86 pCi 137 Cs were measured in the deep water east of Bornholm, compared with 0.45 pCi/l in the surface water at the same place. In the region west of Bornholm, between Bornholm and the Sound, the activity concentrations are on the same level in both surface water and deep water, namely in the range between 0.44 pCi/l and 0.50 pCi/l. (orig.) [de

  4. Kinetics of marine surfactant adsorption at an air water interface. Baltic Sea studies

    Directory of Open Access Journals (Sweden)

    Stanis³aw J. Pogorzelski

    2001-12-01

    Full Text Available The paper contains the results of studies of natural surface film adsorption kinetics carried out in inland waters and in shallow offshore regions of the Baltic Sea during 2000-01 under calm sea conditions. The novel approach presented here for the adsorption dynamics is based on the mixed kinetic-diffusion model and analyses of the surface pressure-time plots at short (t ->0 and long( t -> ∞ adsorption time intervals. Values of the effective relative diffusion coefficient Deff / D (= 0.008-0.607 and energy barrier for adsorption Ea / RT (= 0.49-7.10 agree well with the data reported for model non-ionic surfactant solutions of pre-cmc concentrations. Wind speed is one of the factors affecting the adsorption barrier via the increased surface pressure of the natural film exposed to wind shear stress (~ U102, and enters the relation Ea / RT = 1.70 U101/3.

  5. Numerical modelling of thermodynamics and dynamics of sea ice in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    A. Herman

    2011-04-01

    Full Text Available In this paper, a numerical dynamic-thermo-dynamic sea-ice model for the Baltic Sea is used to analyze the variability of ice conditions in three winter seasons. The modelling results are validated with station (water temperature and satellite data (ice concentration as well as by qualitative comparisons with the Swedish Meteorological and Hydrological Institute ice charts. Analysis of the results addresses two major questions. One concerns effects of meteorological forcing on the spatio-temporal distribution of ice concentration in the Baltic. Patterns of correlations between air temperature, wind speed, and ice-covered area are demonstrated to be different in larger, more open sub-basins (e.g., the Bothnian Sea than in the smaller ones (e.g., the Bothnian Bay. Whereas the correlations with the air temperature are positive in both cases, the influence of wind is pronounced only in large basins, leading to increase/decrease of areas with small/large ice concentrations, respectively. The other question concerns the role of ice dynamics in the evolution of the ice cover. By means of simulations with the dynamic model turned on and off, the ice dynamics is shown to play a crucial role in interactions between the ice and the upper layers of the water column, especially during periods with highly varying wind speeds and directions. In particular, due to the fragmentation of the ice cover and the modified surface fluxes, the ice dynamics influences the rate of change of the total ice volume, in some cases by as much as 1 km3 per day. As opposed to most other numerical studies on the sea-ice in the Baltic Sea, this work concentrates on the short-term variability of the ice cover and its response to the synoptic-scale forcing.

  6. Broad-scale climate influences on spring-spawning herring (Clupea harengus, L. recruitment in the Western Baltic Sea.

    Directory of Open Access Journals (Sweden)

    Joachim P Gröger

    Full Text Available Climate forcing in complex ecosystems can have profound implications for ecosystem sustainability and may thus challenge a precautionary ecosystem management. Climatic influences documented to affect various ecological functions on a global scale, may themselves be observed on quantitative or qualitative scales including regime shifts in complex marine ecosystems. This study investigates the potential climatic impact on the reproduction success of spring-spawning herring (Clupea harengus in the Western Baltic Sea (WBSS herring. To test for climate effects on reproduction success, the regionally determined and scientifically well-documented spawning grounds of WBSS herring represent an ideal model system. Climate effects on herring reproduction were investigated using two global indices of atmospheric variability and sea surface temperature, represented by the North Atlantic Oscillation (NAO and the Atlantic Multi-decadal Oscillation (AMO, respectively, and the Baltic Sea Index (BSI which is a regional-scale atmospheric index for the Baltic Sea. Moreover, we combined a traditional approach with modern time series analysis based on a recruitment model connecting parental population components with reproduction success. Generalized transfer functions (ARIMAX models allowed evaluating the dynamic nature of exogenous climate processes interacting with the endogenous recruitment process. Using different model selection criteria our results reveal that in contrast to NAO and AMO, the BSI shows a significant positive but delayed signal on the annual dynamics of herring recruitment. The westward influence of the Siberian high is considered strongly suppressing the influence of the NAO in this area leading to a higher explanatory power of the BSI reflecting the atmospheric pressure regime on a North-South transect between Oslo, Norway and Szczecin, Poland. We suggest incorporating climate-induced effects into stock and risk assessments and management

  7. The Baltic Sea - from environmental monitoring data to paleoenvironmental reconstructions in a marine/brackish system

    Science.gov (United States)

    Arz, Helge W.; Dellwig, Olaf; Häusler, Katharina; Kaiser, Jérôme; Leipe, Thomas; Moros, Matthias; Pollehne, Falk

    2017-04-01

    Instrumental observations in the Baltic Sea are reaching back into the 19th century, but a comprehensive ecosystem monitoring by means of coastal stations, research vessels, moorings, permanent stations, and satellites was developed stepwise after WWII and significantly intensified after founding of the HELCOM (Helsinki Commission) in 1975 for protecting the Baltic marine environment against anthropogenic influences. Such influences are well recorded in surface sediments of the different Baltic Sea sub-basins, where i.a. heavy metal and organic pollutants accumulated in the course of the last century with characteristic rates. However, despite of the vast amount of instrumental data, calibration of paleoenvironmental proxies is often complicated due to weakly constraint chronologies of these young sediments. In many cases sedimentation is not continuous and sediments are subject to erosion, re-suspension, lateral transport, and focusing due to intense wind driven waves and current activity. Therefore, a direct link of sedimentary proxies with instrumental water column observations is not always straightforward and generally not well established. Recently developed event stratigraphic and radionuclide based chronologies in some restricted Baltic Sea areas like the central Baltic deeps form now a solid base for the in depth proxy development and validation with instrumental time series. Promising results come from e.g. the solid-phase Mn and trace element signatures and organic biomarkers in recent/sub-recent sediments from the central Baltic Sea enhancing the potential of reconstructing the Littorina-Stage environmental development.

  8. Satellite Monitoring Systems for Shipping and Offshore Oil and Gas Industry in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Kostianoy A.G.

    2015-06-01

    Full Text Available Shipping activities, oil production and transport in the sea, oil handled in harbors, construction and exploitation of offshore oil and gas pipelines have a number of negative impacts on the marine environment and coastal zone of the seas. In 2004-2014 we elaborated several operational satellite monitoring systems for oil and gas companies in Russia and performed integrated satellite monitoring of the ecological state of coastal waters in the Baltic, Black, Caspian, and Kara seas, which included observation of oil pollution, suspended matter, and algae bloom at a fully operational mode. These monitoring systems differ from the existing ones by the analysis of a wide spectrum of satellite, meteorological and oceanographic data, as well as by a numerical modeling of oil spill transformation and transport in real weather conditions. Our experience in the Baltic Sea includes: (1 integrated satellite monitoring of oil production at the LUKOIL-KMN Ltd. D-6 oil rig in the Southeastern Baltic Sea (Kravtsovskoe oil field in 2004-2014; (2 integrated satellite monitoring of the “Nord Stream” underwater gas pipeline construction and exploitation in the Gulf of Finland (2010-2013; (3 numerical modeling of risks of oil pollution caused by shipping along the main maritime shipping routes in the Gulf of Finland, the Baltic Proper, and in the Southeastern Baltic Sea; (4 numerical modeling of risks of oil pollution caused by oil production at D-6 oil rig and oil transportation on shore via the connecting underwater oil pipeline.

  9. Comparison of several climate indices as inputs in modelling of the Baltic Sea runoff

    Energy Technology Data Exchange (ETDEWEB)

    Hanninen, J.; Vuorinen, I. [Turku Univ. (Finland). Archipelaco Research Inst.], e-mail: jari.hanninen@utu.fi

    2012-11-01

    Using Transfer function (TF) models, we have earlier presented a chain of events between changes in the North Atlantic Oscillation (NAO) and their oceanographical and ecological consequences in the Baltic Sea. Here we tested whether other climate indices as inputs would improve TF models, and our understanding of the Baltic Sea ecosystem. Besides NAO, the predictors were the Arctic Oscillation (AO), sea-level air pressures at Iceland (SLP), and wind speeds at Hoburg (Gotland). All indices produced good TF models when the total riverine runoff to the Baltic Sea was used as a modelling basis. AO was not applicable in all study areas, showing a delay of about half a year between climate and runoff events, connected with freezing and melting time of ice and snow in the northern catchment area of the Baltic Sea. NAO appeared to be most useful modelling tool as its area of applicability was the widest of the tested indices, and the time lag between climate and runoff events was the shortest. SLP and Hoburg wind speeds showed largely same results as NAO, but with smaller areal applicability. Thus AO and NAO were both mostly contributing to the general understanding of climate control of runoff events in the Baltic Sea ecosystem. (orig.)

  10. Specific Chemical and Genetic Markers Revealed a Thousands-Year Presence of Toxic Nodularia spumigena in the Baltic Sea.

    Science.gov (United States)

    Cegłowska, Marta; Toruńska-Sitarz, Anna; Kowalewska, Grażyna; Mazur-Marzec, Hanna

    2018-04-04

    In the Baltic Sea, diazotrophic cyanobacteria have been present for thousands of years, over the whole brackish water phase of the ecosystem. However, our knowledge about the species composition of the cyanobacterial community is limited to the last several decades. In the current study, the presence of species-specific chemical and genetic markers in deep sediments were analyzed to increase the existing knowledge on the history of toxic Nodularia spumigena blooms in the Baltic Sea. As chemical markers, three cyclic nonribosomal peptides were applied: the hepatotoxic nodularin, which in the sea was detected solely in N. spumigena , and two anabaenopeptins (AP827 and AP883a) characteristic of two different chemotypes of this species. From the same sediment samples, DNA was isolated and the gene involved in biosynthesis of nodularin, as well as the phycocyanin intergenic spacer region (PC-IGS), were amplified. The results of chemical and genetic analyses proved for the first time the thousands-year presence of toxic N. spumigena in the Baltic Sea. They also indicated that through all this time, the same two sub-populations of the species co-existed.

  11. Towards uncertainty estimation for operational forecast products - a multi-model-ensemble approach for the North Sea and the Baltic Sea

    Science.gov (United States)

    Golbeck, Inga; Li, Xin; Janssen, Frank

    2014-05-01

    Several independent operational ocean models provide forecasts of the ocean state (e.g. sea level, temperature, salinity and ice cover) in the North Sea and the Baltic Sea on a daily basis. These forecasts are the primary source of information for a variety of information and emergency response systems used e.g. to issue sea level warnings or carry out oil drift forecast. The forecasts are of course highly valuable as such, but often suffer from a lack of information on their uncertainty. With the aim of augmenting the existing operational ocean forecasts in the North Sea and the Baltic Sea by a measure of uncertainty a multi-model-ensemble (MME) system for sea surface temperature (SST), sea surface salinity (SSS) and water transports has been set up in the framework of the MyOcean-2 project. Members of MyOcean-2, the NOOS² and HIROMB/BOOS³ communities provide 48h-forecasts serving as inputs. Different variables are processed separately due to their different physical characteristics. Based on the so far collected daily MME products of SST and SSS, a statistical method, Empirical Orthogonal Function (EOF) analysis is applied to assess their spatial and temporal variability. For sea surface currents, progressive vector diagrams at specific points are consulted to estimate the performance of the circulation models especially in hydrodynamic important areas, e.g. inflow/outflow of the Baltic Sea, Norwegian trench and English Channel. For further versions of the MME system, it is planned to extend the MME to other variables like e.g. sea level, ocean currents or ice cover based on the needs of the model providers and their customers. It is also planned to include in-situ data to augment the uncertainty information and for validation purposes. Additionally, weighting methods will be implemented into the MME system to develop more complex uncertainty measures. The methodology used to create the MME will be outlined and different ensemble products will be presented. In

  12. The Baltic-Pontic region in the Europe-Eurasia dual system

    Directory of Open Access Journals (Sweden)

    Ilyin Mikhail

    2012-03-01

    Full Text Available This article considers the Baltic-Pontic Sea region not only as a geographical space of Intermarium (Międzymorze, Tarpjūris etc. but also as Intermundium or the interface of European and Russian (Eurasian civilization. The study sets out to clarify the logic of changing patterns shaping this geopolitical area. To this end, the concept of the Baltic-Pontic conflict system proposed by Vadim Tsymbursky is applied and further developed. In contrast to his agent-focused vehicle of analysis disclosing the power interactions in Intermarium, the authors advance an alternative structure-focused model of the Baltic-Pontic system (BPS as a multidimensional evolving space of heterogeneous interactions, which include cooperation. The authors suggest applying the BPS models in interpreting and clarifying historical developments in the area from the late 14th century until the present. The article analyses the spatial, geopolitical and geochronopolitical characteristics of the region, as well as the models of intercivilisational interaction between Europe and Eurasia. The author addresses the issue of the political identity of the region and its ability to play an independent role in the world politics.

  13. Tradeoffs between environmental goals and urban development: the case of nitrogen load from the Stockholm County to the Baltic Sea.

    Science.gov (United States)

    Jansson, Asa; Colding, Johan

    2007-12-01

    Urban dwellers depend on the generation of ecosystem services for their welfare. The city of Stockholm is growing, and a 25% increase in population is projected by 2030. The effects of urban development were estimated through the quantification of nitrogen (N) leakage to the Baltic Sea under two urban development scenarios. We found that total net N load will increase by 6% or 8%, depending on which growth scenario is applied, and population increase by itself will contribute at least 15% of the point source N leakage. Technical improvements in sewage treatment could, according to our results, decrease total N load to the Baltic Sea by 4%. Based on our results, we conclude that proactive measures such as spatial urban planning can provide a constructive tool for sustainable urban development on regional as well as national and international scales, depending on geographical context as well as the ecosystem services' scale of operation.

  14. Intercomparison of sediment sampling devices using artificial radionuclides in Baltic Sea sediments. The MOSSIE Report

    International Nuclear Information System (INIS)

    2000-01-01

    During the last four decades Baltic Sea sediments have been an excellent object for research by radioecologists and other scientists studying sedimentation and other processes in sediments using artificial radionuclides deposited in sediment laminae of the seabed in chronological order. This is due to two major events which have caused significant radioactive fallout in the Baltic Sea region, leaving distinct markers in the corresponding layers of the sediments. One was the global fallout from atmospheric nuclear weapon tests in the late 1950s and early '60s, resulting in clear peaks of longlived radionuclides such as Cs -13 7, Sr -90 and certain transuranic elements (especially Pu -239,240 ) in the sediments. Another was the fallout from the accident at Chernobyl NPP, in the former USSR, in April 1986. Since the first radioactive clouds from Chernobyl travelled north and caused high deposition in the Baltic Sea region, the Baltic was the sea most affected by the accident. The main long-lived constituents in this fallout were Cs -137 and Cs -134 . These radioactive markers have since been utilised, e.g. in dating sediments and determining the sedimentation rate. The sedimentation rate (mm a -1 ) and sediment accumulation rate (g cm -2 a -1 ) vary widely in the Baltic Sea, depending on the area and local environmental factors there. The rates may even be different at sampling points situated very near to each other. A study carried out in 1995-1996 showed that the sedimentation rates varied between 0.2 and 29 mm a -1 at different soft-bottom sampling sites in the Baltic Sea, depending on the sedimentation itself and the method used for calculation. The corresponding accumulation rates of dry matter ranged from 0.006 to 0.90 g cm -2 a -1 . The importance of undisturbed, high-quality samples is especially pronounced in sedimentation rate studies. The loss of soft surface sediments during sampling can significantly affect the results, at least if the calculations are

  15. Assessment of Marine Mammal Impact Zones for Use of Military Sonar in the Baltic Sea.

    Science.gov (United States)

    Andersson, Mathias H; Johansson, Torbjörn

    2016-01-01

    Military sonars are known to have caused cetaceans to strand. Navies in shallow seas use different frequencies and sonar pulses, commonly frequencies between 25 and 100 kHz, compared with most studied NATO sonar systems that have been evaluated for their environmental impact. These frequencies match the frequencies of best hearing in the harbor porpoises and seals resident in the Baltic Sea. This study uses published temporary and permanent threshold shifts, measured behavioral response thresholds, technical specifications of a sonar system, and environmental parameters affecting sound propagation common for the Baltic Sea to estimate the impact zones for harbor porpoises and seals.

  16. 18O/16O ratios of the pore water of Baltic Sea sediments

    International Nuclear Information System (INIS)

    Foerstel, H.

    1983-01-01

    Two cores of Baltic Sea sediment were collected in 1975. The 18 O/ 16 O ratio of the water enclosed in the sediment (pore water) was measured after the separation of the liquid from the solid phase. The results may support the discussion about the history of the Baltic Sea. At the top of the core the 18 O/ 16 O ratio of the water represents the oxygen isotope composition of the sea water above. Towards the deeper parts of the sediment, independently of the salt content, the 18 O/ 16 O ratio decreases towards values observed in the precipitation of the surrounding land areas. (author)

  17. Predominant hydro-climatic driver-effect relationships identified for the Baltic Sea

    Science.gov (United States)

    Chen, Y.; Destouni, G.; Vigouroux, G.; Bring, A.; Cvetkovic, V.

    2017-12-01

    Climate model outputs include numerous variables of possible interest for modelling climate change impacts on the hydrodynamics and water quality of coastal-marine systems. In addition, various climate models perform differently well and their results exhibit various degrees of uncertainty. To constructively focus and increase robustness and reliability in projection simulations and assessments of future climate-change effects on coastal-marine environments, there is a need to investigate if any climate change variables may be particularly important to consider. As a way forward to determine this for the Baltic Sea, this study identifies and considers three representative years with different hydro-climatic driver-effect settings. These include, e.g., different conditions for heat flux, wind, water levels, and freshwater and saltwater influxes to the Baltic Sea. The three representative years and their different driver-effect characteristics are further used for forcing and validation of three-dimensional hydrodynamic Baltic Sea modeling, using the FVCOM open-source code model. The simulation results show that the heat flux input is the predominant driver of water temperature conditions in the Baltic Sea. Furthermore, they show that the river runoff is significantly correlated with the saltwater influx at the open Baltic Sea boundary, with these two variables working together to predominantly determine the salinity conditions in the sea. Moreover, flow structure is studied in terms of flow directions and rates among the main marine basins of the Baltic Sea. The results show that the directions of flows are quite stable, but the flow magnitudes fluctuate considerably and are mainly influenced by the prevailing wind conditions. For the Baltic Sea, this study has thus identified as predominant driver-effect combinations: heat flux-sea temperature, runoff (and correlated open-boundary influx)-sea salinity, and wind-sea flow structure. These results facilitate and will

  18. NORSEWIND – Mesoscale model derived Wind Atlases for the Irish Sea, the North Sea and the Baltic Sea

    OpenAIRE

    Berge, Erik; Hasager, Charlotte Bay; Bredesen, Rolv Erlend; Hahmann, Andrea N.; Byrkjedal, Oyvind; Pena Diaz, Alfredo; Kravik, Reiar; Harstveit, Knut; Costa, Paolo; Oldroyd, Andy

    2013-01-01

    As a part of the EU Framework 7 R&D Program NORSEWInD, Wind Atlases for the Irish Sea, the North Sea and the Baltic Sea have been developed and made public available. In the present study the development of the offshore Wind Atlases is focused on the use of mesoscale model data since the access to measurements and satellite data have been limited. Mesoscale model runs were carried out for focus areas with high spatial model resolution (2 km) and the entire Wind Atlas domain with coarser r...

  19. Saint Petersburg as a Global Coastal City: Positioning in the Baltic Region

    Directory of Open Access Journals (Sweden)

    Lachininskii Stanislav

    2015-09-01

    Full Text Available The Baltic region consists of coastal areas of nine countries — Russia, Estonia, Latvia, Lithuania, Poland, Germany, Denmark, Sweden, and Finland. The region’s hubs are the port cities located along the Baltic Sea coast. However, Peter Taylor and Saskia Sassen’s classification identifies higher status cities and ‘global cities’, which are to be considered in the global context. Seven coastal regions are distinguished within this region, whose organising centers are the global coastal cities of Stockholm, Copenhagen, Helsinki, Riga, Tallinn, St. Petersburg, and Malmö. The concept of a “global city-region” (Sassen can be used as a methodological framework for analyzing this connection. Within this hierarchy, the dominant alpha group global city is Stockholm. The authors argue that, as a global coastal city, St. Petersburg forms the St. Petersburg coastal region, which can be defined as a typical "global city region". The index method shows that the position of St. Petersburg in the system of global coastal cities of the Baltic region is relatively favorable in view of its transport, logistics, and demographic potential and the advantageous geo-economic situation. St. Petersburg has certain competitive advantages in the region brought about by its demographic potential, port freight capacity, and the favorable geo-economic position of the "sea gate" of Russia. However, the level of high-tech services and ‘new economy’ development is not sufficient for the port to become a match for the top three cities (Stockholm, Helsinki, and Copenhagen. This is increasingly important because transboundary global city networks demonstrate that global cities are functions of global networks. Saint Petersburg is just starting to integrate into these networks through the Pulkovo airline hub and seaports of Ust-Luga, Primorsk, and Saint Petersburg.

  20. Saint Petersburg as a Global Coastal City: Positioning in the Baltic Region

    Directory of Open Access Journals (Sweden)

    Lachninsky S.

    2015-08-01

    Full Text Available The Baltic region consists of coastal areas of nine countries — Russia, Estonia, Latvia, Lithuania, Poland, Germany, Denmark, Sweden, and Finland. The region’s hubs are the port cities located along the Baltic Sea coast. However, Peter Taylor and Saskia Sassen’s classification identifies higher status cities and ‘global cities’, which are to be considered in the global context. Seven coastal regions are distinguished within this region, whose organising centers are the global coastal cities of Stockholm, Copenhagen, Helsinki, Riga, Tallinn, St. Petersburg, and Malmö. The concept of a “global city-region” (Sassen can be used as a methodological framework for analyzing this connection. Within this hierarchy, the dominant alpha group global city is Stockholm. The authors argue that, as a global coastal city, St. Petersburg forms the St. Petersburg coastal region, which can be defined as a typical "global city region". The index method shows that the position of St. Petersburg in the system of global coastal cities of the Baltic region is relatively favorable in view of its transport, logistics, and demographic potential and the advantageous geo-economic situation. St. Petersburg has certain competitive advantages in the region brought about by its demographic potential, port freight capacity, and the favorable geo-economic position of the "sea gate" of Russia. However, the level of high-tech services and ‘new economy’ development is not sufficient for the port to become a match for the top three cities (Stockholm, Helsinki, and Copenhagen. This is increasingly important because transboundary global city networks demonstrate that global cities are functions of global networks. Saint Petersburg is just starting to integrate into these networks through the Pulkovo airline hub and seaports of Ust-Luga, Primorsk, and Saint Petersburg.

  1. Recovery of atypical Aeromonas salmonicida from ulcerated fish from the Baltic Sea

    DEFF Research Database (Denmark)

    Wiklund, T.; Tabolina, I; Bezgachina, T.V.

    1999-01-01

    Ulcerated fish of six different species were collected during the BMB/ICES Sea-going Workshop "Fish Diseases and Parasites in the Baltic Sea", 25 November to 8 December 1994, and examined for bacteriological infections. Atypical Aeromonas salmonicida strains were isolated from the majority...

  2. Stickleback increase in the Baltic Sea : A thorny issue for coastal predatory fish

    NARCIS (Netherlands)

    Bergstrom, Ulf; Olsson, Jens; Casini, Michele; Eriksson, Britas Klemens; Fredriksson, Ronny; Wennhage, Hakan; Appelberg, Magnus

    2015-01-01

    In the Baltic Sea, the mesopredator three-spined stickleback (Gasterosteus aculeatus) spends a large part of its life cycle in the open sea, but reproduces in shallow coastal habitats. In coastal waters, it may occur in high abundances, is a potent predator on eggs and larvae of fish, and has been

  3. Marine boundary layer and turbulent fluxes over the Baltic Sea: Measurements and modelling

    DEFF Research Database (Denmark)

    Gryning, Sven-Erik; Batchvarova, E.

    2002-01-01

    Two weeks of measurements of the boundary-layer height over a small island (Christianso) in the Baltic Sea are discussed. The meteorological conditions are characterised by positive heat flux over the sea. The boundary-layer height was simulated with two models, a simple applied high-resolution (...

  4. The Baltic Sea - an example of how to protect marine coastal ecosystems

    Directory of Open Access Journals (Sweden)

    Dietwart Nehring

    2001-03-01

    Full Text Available The Baltic Sea covers an area of 415 000 km2. A typical brackish sea, it is very sensitive to anthropogenic activities. Inorganic nutrients, trace metals, chlorinated hydrocarbons and crude oil products are contaminants studied in the Baltic Monitoring Programme of HELCOM. The data collected by the riparian countries forms the basis for the periodic assessments of the state of the marine environment of the Baltic Sea Area produced by HELCOM every five years. Since 1992 marine nature conservation has been part of the HELCOM convention. According to the third status report issued in 1996, it was the first time that HELCOM could strike a positive balance with regard to the decreasing environmental load. This is also reflected in lower concentrations of harmful substances in fish, marine mammals and seabirds in the Baltic Sea Area. The reasons for this progress are the protective actions initiated by HELCOM and the economic collapse in some of the former East Bloc countries, the latter resulting in an abrupt fall in industrial and agricultural production. Although the restoration of the Baltic ecosystem has only just begun, the protective measures introduced to achieve this aim can serve as an example of how to solve similar problems in other semi-enclosed basins and shelf seas.

  5. Occurrence of perfluorinated organic acids in the North and Baltic seas. Part 1: distribution in sea water.

    Science.gov (United States)

    Theobald, Norbert; Caliebe, Christina; Gerwinski, Wolfgang; Hühnerfuss, Heinrich; Lepom, Peter

    2011-08-01

    Due to their high water solubilities and mobilities, persistent, polar perfluorinated compounds (PFCs) such as perfluorinated carboxylates and sulfonates are likely to end up in the oceans. In part 1 of this study, their distribution in North and Baltic Sea water is reported, being of special interest because these seas are surrounded by highly industrialized countries with high population densities. A combination of solid-phase extraction and liquid chromatography coupled with tandem mass spectrometry was used after optimisation to determine nine PFCs with chain lengths of C(4) to C(10) in water samples at ultra-trace levels. The observed concentration distribution and gradients were explained by oceanographic mixing processes and currents. The big rivers were identified as major input sources. At the mouth of the river Elbe, concentrations of 9 ng/L were observed for perfluorooctanoate (PFOA), and 8 ng/L for perfluorooctylsulfonate (PFOS); all other PFC concentrations ranged from 0.6 to 1.7 ng/L. At coastal stations, concentrations decreased to 3.8 ng/L (PFOA) and 1.8 ng/L (PFOS), dropping to 0.13 and 0.09 ng/L, respectively, towards the open sea. Along the Dutch coast, high perfluorobutylsulfonate concentrations (3.9 ng/L) were observed as regional characteristics. In the Baltic Sea, fairly even PFC distributions with low gradients were observed. Again, PFOA and PFOS were the major compounds (up to 1.1 and 0.9 ng/L). The results underline the necessity to include PFCs in marine monitoring programs. Water was found to be a good matrix for monitoring environmental levels, sources, and transport pathways of PFCs.

  6. Vertical distribution of (241)Pu in the southern Baltic Sea sediments.

    Science.gov (United States)

    Strumińska-Parulska, Dagmara I

    2014-12-15

    The vertical distribution of plutonium (241)Pu in marine sediments can assist in determining the deposition history and sedimentation process of analyzed regions. In addition, (241)Pu/(239+240)Pu activity ratio could be used as a sensitive fingerprint for radioactive source identification. The present preliminary studies on vertical distribution of (241)Pu in sediments from four regions of the southern Baltic Sea are presented. The distribution of (241)Pu was not uniform and depended on sediment geomorphology and depth as well as location. The highest concentrations of plutonium were found in the surface layers of all analyzed sediments and originated from the Chernobyl accident. Copyright © 2014 Elsevier Ltd. All rights reserved.

  7. Numerical modelling of the buoyant marine microplastics in the South-Eastern Baltic Sea

    Science.gov (United States)

    Bagaev, Andrei; Mizyuk, Artem; Chubarenko, Irina; Khatmullilna, Liliya

    2017-04-01

    Microplastics is a burning issue in the marine pollution science. Its sources, ways of propagation and final destiny pose a lot of questions to the modern oceanographers. Hence, a numerical model is an optimal tool for reconstruction of microplastics pathways and fate. Within the MARBLE project (lamp.ocean.ru), a model of Lagrangian particles transport was developed. It was tested coupled with oceanographic transport fields from the operational oceanography product of Copernicus Marine Monitoring Environment Service. Our model deals with two major types of microplastics such as microfibres and buoyant spheroidal particles. We are currently working to increase the grid resolution by means of the NEMO regional configuration for the south-eastern Baltic Sea. Several expeditions were organised to the three regions of the Baltic Sea (the Gotland, the Bornholm, and the Gdansk basins). Water samples from the surface and different water layers were collected, processed, and analysed by our team. A set of laboratory experiments was specifically designed to establish the settling velocity of particles of various shapes and densities. The analysis in question provided us with the understanding necessary for the model to reproduce the large-scale dynamics of microfibres. In the simulation, particles were spreading from the shore to the deep sea, slowly sinking to the bottom, while decreasing in quantity due to conditional sedimentation. Our model is expected to map out the microplastics life cycle and to account for its distribution patterns under the impact of wind and currents. For this purpose, we have already included the parameterization for the wind drag force applied to a particle. Initial results of numerical experiments seem to indicate the importance of proper implicit parameterization of the particle dynamics at the vertical solid boundary. Our suggested solutions to that problem will be presented at the EGU-2017. The MARBLE project is supported by Russian Science

  8. The Baltic Sea Experiment (BALTEX): A European contribution to the investigation of the energy and water cycle over a large drainage basin

    DEFF Research Database (Denmark)

    Raschke, E.; Meywerk, J.; Warrach, K.

    2001-01-01

    The Baltic Sea Experiment (BALTEX) is one of the five continental-scale experiments of the Global Energy and Water Cycle Experiment (GEWEX). More than 50 research groups from 14 European countries are participating in this project to measure and model the energy and water cycle over the large...... drainage basin of the Baltic Sea in northern Europe. BALTEX aims to provide a better understanding of the processes of the climate system and to improve and to validate the water cycle in regional numerical models for weather forecasting and climate studies. A major effort is undertaken to couple...

  9. Transport and hydraulically-induced recycling of phosphorous in the North Sea-Baltic Sea transition zone

    DEFF Research Database (Denmark)

    Kepp, Rikke; Struve, Anke; Christiansen, Christian

    2006-01-01

    Bottom-mounted acoustic Doppler current profiler measurements indicate that the net transport of water (844 m3 s-1) in the Little Belt makes up only 6% of the total transport between the Baltic Sea and the North Sea. This is a smaller percentage than the 9% commonly found in the literature. Owing...

  10. The BMB/ICES sea-going workshop "Fish diseases and parasites in the Baltic sea" - introduction and conclusions

    DEFF Research Database (Denmark)

    Lang, T.; Mellergaard, Stig

    1999-01-01

    General information on the rationale and objectives of the BMB/ICES Sea-going Workshop "Fish Diseases and Parasites in the Baltic Sea" (25 November to 8 December 1994), as well as cruise and methodological information, is presented as an introduction to a set of right contributions that describe...

  11. The US ballistic missile defence policy in the Baltic and Nordic regions

    Directory of Open Access Journals (Sweden)

    Konyshev Valery

    2016-03-01

    Full Text Available This article examines the implications of the deployment of the US ballistic missile defense (BMD system in the Baltic and Nordic regions. These implications are to be considered to ensure Russia’s military security. Using the structural-functional method, the authors analyse the internal structure of the US BMD in Europe, stages of its implementation, and its influence on the military equilibrium in the region. Being similar to other regional missile defence systems of the Pentagon, BMD in Europe increases the offensive capabilities of the US armed forces and its allies and in doing so, it stops performing a purely defensive mission declared by Washington. It is stressed that the deployment of mobile sea- and land-based BMD elements in the Baltic Sea region and Nordic countries will inevitably destabilize the strategic situation and may lead to a new round of arms race in the region. The efficacy of BMD in Europe is evaluated from the perspective of military technology. The system’s potential threats to Russia’s military security and its armed forces are assessed. The article considers measures to enhance national security that could be taken by Russia provided the US plans to deploy BMD in Europe are fully implemented.

  12. Monitoring of radionuclides in the Baltic Sea in 1989-1990

    International Nuclear Information System (INIS)

    Ilus, E.; Sjoeblom, K.L.; Ikaeheimonen, T.; Saxen, R.; Klemola, S.

    1993-02-01

    Monitoring of radioactive substances in the Baltic Sea continued within the framework of the Finnish national monitoring programme. Samples of sea water, bottom sediment and fish were collected for radionuclide analyses. All samples were analysed for gamma-emitting radionuclides and some also for 90 Sr and transuranic elements. The general levelling of Chernobyl derived 137 Cs and 134 Cs in the water mass of the Baltic Sea, which had started soon after the fallout situation, continued in 1989. The activity concentration of 137 Cs was about the same level (120-160 Bq/m 3 ) in surface water throughout the Baltic Sea area except in some coastal areas. The cesium concentrations had levelled vertically as well as horizontally. In 1990, the cesium concentrations of surface water decreased further in other sea areas, but not in the Bothnian Sea, where somewhat higher values were detected once more. In bottom sediments the total amounts of 137 Cs had clearly increased between 1988 and 1990 which indicates that fresh fallout was still settling on the bottom. No increase was found in the total amounts of 239 , 240 Pu. Small amounts of 60 Co were detected in the surface sediment of our sampling station in the Northern Baltic proper. 137 Cs concentrations in Baltic herring ranged from 17 to 32 Bq/kg fresh weight and pike from 22 to 290 Bq/kg fresh weight, the maximum values being in the samples supplied from the Vaasa archipelago. The internal radiation dose received by Finns from eating Baltic Sea fish was 0.01mSv both in 1989 and in 1990. (orig.)

  13. Primary production calculations for sea ice from bio-optical observations in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Susann Müller

    2016-09-01

    Full Text Available Abstract Bio-optics is a powerful approach for estimating photosynthesis rates, but has seldom been applied to sea ice, where measuring photosynthesis is a challenge. We measured absorption coefficients of chromophoric dissolved organic matter (CDOM, algae, and non-algal particles along with solar radiation, albedo and transmittance at four sea-ice stations in the Gulf of Finland, Baltic Sea. This unique compilation of optical and biological data for Baltic Sea ice was used to build a radiative transfer model describing the light field and the light absorption by algae in 1-cm increments. The maximum quantum yields and photoadaptation of photosynthesis were determined from 14C-incorporation in photosynthetic-irradiance experiments using melted ice. The quantum yields were applied to the radiative transfer model estimating the rate of photosynthesis based on incident solar irradiance measured at 1-min intervals. The calculated depth-integrated mean primary production was 5 mg C m–2 d–1 for the surface layer (0–20 cm ice depth at Station 3 (fast ice and 0.5 mg C m–2 d–1 for the bottom layer (20–57 cm ice depth. Additional calculations were performed for typical sea ice in the area in March using all ice types and a typical light spectrum, resulting in depth-integrated mean primary production rates of 34 and 5.6 mg C m–2 d–1 in surface ice and bottom ice, respectively. These calculated rates were compared to rates determined from 14C incorporation experiments with melted ice incubated in situ. The rate of the calculated photosynthesis and the rates measured in situ at Station 3 were lower than those calculated by the bio-optical algorithm for typical conditions in March in the Gulf of Finland by the bio-optical algorithm. Nevertheless, our study shows the applicability of bio-optics for estimating the photosynthesis of sea-ice algae.

  14. Environmental niche separation between native and non-native benthic invertebrate species: Case study of the northern Baltic Sea.

    Science.gov (United States)

    Jänes, Holger; Herkül, Kristjan; Kotta, Jonne

    2017-10-01

    Knowledge and understanding of geographic distributions of species is crucial for many aspects in ecology, conservation, policy making and management. In order to reach such an understanding, it is important to know abiotic variables that impact and drive distributions of native and non-native species. We used an existing long-term macrobenthos database for species presence-absence information and biomass estimates at different environmental gradients in the northern Baltic Sea. Region specific abiotic variables (e.g. salinity, depth) were derived from previously constructed bathymetric and hydrodynamic models. Multidimensional ordination techniques were then applied to investigate potential niche space separation between all native and non-native invertebrates in the northern Baltic Sea. Such an approach allowed to obtain data rich and robust estimates of the current native and non-native species distributions and outline important abiotic parameters influencing the observed pattern. The results showed clear niche space separation between native and non-native species. Non-native species were situated in an environmental space characterized by reduced salinity, high temperatures, high proportion of soft seabed and decreased depth and wave exposure whereas native species displayed an opposite pattern. Different placement of native and non-native species along the studied environmental niche space is likely to be explained by the differences in their evolutionary history, human mediated activities and geological youth of the Baltic Sea. The results of this study can provide early warnings and effectively outline coastal areas in the northern Baltic Sea that are prone to further range expansion of non-native species as climate change is expected to significantly reduce salinity and increase temperature in wide coastal areas, both supporting the disappearance of native and appearance of non-native species. Copyright © 2017 Elsevier Ltd. All rights reserved.

  15. Transport interests and environmental regimes. The Baltic Sea transit of Russian oil exports

    International Nuclear Information System (INIS)

    Knudsen, Olav F.

    2010-01-01

    In the environmentally exposed Baltic Sea, a prolonged confrontation has set the transport interests of Russian crude oil against environmental interests, promoted by Russia's neighbours. During the 1990s all the Baltic littoral states - including Russia - collaborated well on marine environmental issues. When Russian oil exports accelerated after 1999, this environmental understanding broke down. Russian interests shifted as its oil income suddenly rose drastically. The confrontation peaked over a proposal to make the entire Baltic Sea into a particularly sensitive sea area (PSSA) under the International Maritime Organization (IMO). The proposal was adopted by the IMO in spite of Russian objections. The article shows how environmental interests trump transport interests in a manner that may not be sustainable. The case illustrates the need for environmental collaboration to be flexible in the face of shifting constellations of competing interests. (author)

  16. Time changes in fishing power in the Danish cod fisheries of the Baltic Sea

    DEFF Research Database (Denmark)

    Marchal, P.; Nielsen, J. Rasmus; Hovgård, Holger

    2001-01-01

    Using nominal fishing effort to control fishing mortality and using cpue data from commercial fisheries as abundance indices require ability to correct fishing power for temporal development. It is often assumed in ICES stock assessments that fishing power Is constant over time. However, experience...... has suggested that this assumption may be false. This study investigates the time dynamics of an Index of Fishing Power (IFP). This index is based on the fleets cpue. relative to the cpue of a subset of vessels from the same fleet. The primary characteristic of the reference vessels...... is that their fishing power has not varied much over time. IFP is calculated for some of the Danish cod fisheries in the Baltic Sea. IFP appeared to be independent of the vessel composition of the reference sub- fleet and for the fleets fishing in the Eastern Baltic Sea. but less so for the Western Baltic Sea fleets...

  17. The nutrient load from food waste generated onboard ships in the Baltic Sea.

    Science.gov (United States)

    Wilewska-Bien, Magda; Granhag, Lena; Andersson, Karin

    2016-04-15

    The combination of the sensitive characteristics of the Baltic Sea and the intense maritime traffic makes the marine environment vulnerable to anthropogenic influences. The theoretical scenario calculated in this study shows that the annually generated food waste onboard ships in traffic in the Baltic Sea contains about 182tonnes of nitrogen and 34tonnes of phosphorus. Today, all food waste generated onboard can be legally discharged into the marine environment at a distance of 12NM from the nearest land. The annual load of nitrogen contained in the food waste corresponds to 52% of load of nitrogen from the ship-generated sewage. Future regulations for sewage discharge in the Baltic Sea will require significant reduction of total nitrogen and phosphorus released. The contribution of nutrients from food waste compared to sewage will therefore be relatively larger in the future, if food waste still can be legally discharged. Copyright © 2015 Elsevier Ltd. All rights reserved.

  18. Hierarchy of factors exerting an impact on nutrient load of the Baltic Sea and sustainable management of its drainage basin.

    Science.gov (United States)

    Kiedrzyńska, Edyta; Jóźwik, Adam; Kiedrzyński, Marcin; Zalewski, Maciej

    2014-11-15

    The aim of the paper was to evaluate 23 catchment factors that determine total phosphorus and total nitrogen load to the Baltic Sea. Standard correlation analysis and clustering were used. Both phosphorus and nitrogen loads were found to be positively related to the number of pigs and the human population associated with wastewater treatment plants (WWTPs) per km(2), while the number of cattle and agricultural area were found to influence nitrogen rather than phosphorus load, and the area of forests is negatively related to loads of both nutrients. Clustering indicates an overall north-south pattern in the spatial co-occurrence of socio-ecological factors, with some exceptions discussed in the paper. Positive steps in the Baltic Sea region have already been taken, but much remains to be done. The development of coherent response policies to reduce eutrophication in the Baltic Sea should be based on a comprehensive knowledge base, an appropriate information strategy and learning alliance platform in each drainage river catchments. Copyright © 2014 Elsevier Ltd. All rights reserved.

  19. Comparative Genomics of the Baltic Sea Toxic Cyanobacteria Nodularia spumigena UHCC 0039 and Its Response to Varying Salinity.

    Science.gov (United States)

    Teikari, Jonna E; Hou, Shengwei; Wahlsten, Matti; Hess, Wolfgang R; Sivonen, Kaarina

    2018-01-01

    Salinity is an important abiotic factor controlling the distribution and abundance of Nodularia spumigena , the dominating diazotrophic and toxic phototroph, in the brackish water cyanobacterial blooms of the Baltic Sea. To expand the available genomic information for brackish water cyanobacteria, we sequenced the isolate Nodularia spumigena UHCC 0039 using an Illumina-SMRT hybrid sequencing approach, revealing a chromosome of 5,294,286 base pairs (bp) and a single plasmid of 92,326 bp. Comparative genomics in Nostocales showed pronounced genetic similarity among Nodularia spumigena strains evidencing their short evolutionary history. The studied Baltic Sea strains share similar sets of CRISPR-Cas cassettes and a higher number of insertion sequence (IS) elements compared to Nodularia spumigena CENA596 isolated from a shrimp production pond in Brazil. Nodularia spumigena UHCC 0039 proliferated similarly at three tested salinities, whereas the lack of salt inhibited its growth and triggered transcriptome remodeling, including the up-regulation of five sigma factors and the down-regulation of two other sigma factors, one of which is specific for strain UHCC 0039. Down-regulated genes additionally included a large genetic region for the synthesis of two yet unidentified natural products. Our results indicate a remarkable plasticity of the Nodularia salinity acclimation, and thus salinity strongly impacts the intensity and distribution of cyanobacterial blooms in the Baltic Sea.

  20. Comparative Genomics of the Baltic Sea Toxic Cyanobacteria Nodularia spumigena UHCC 0039 and Its Response to Varying Salinity

    Directory of Open Access Journals (Sweden)

    Jonna E. Teikari

    2018-03-01

    Full Text Available Salinity is an important abiotic factor controlling the distribution and abundance of Nodularia spumigena, the dominating diazotrophic and toxic phototroph, in the brackish water cyanobacterial blooms of the Baltic Sea. To expand the available genomic information for brackish water cyanobacteria, we sequenced the isolate Nodularia spumigena UHCC 0039 using an Illumina-SMRT hybrid sequencing approach, revealing a chromosome of 5,294,286 base pairs (bp and a single plasmid of 92,326 bp. Comparative genomics in Nostocales showed pronounced genetic similarity among Nodularia spumigena strains evidencing their short evolutionary history. The studied Baltic Sea strains share similar sets of CRISPR-Cas cassettes and a higher number of insertion sequence (IS elements compared to Nodularia spumigena CENA596 isolated from a shrimp production pond in Brazil. Nodularia spumigena UHCC 0039 proliferated similarly at three tested salinities, whereas the lack of salt inhibited its growth and triggered transcriptome remodeling, including the up-regulation of five sigma factors and the down-regulation of two other sigma factors, one of which is specific for strain UHCC 0039. Down-regulated genes additionally included a large genetic region for the synthesis of two yet unidentified natural products. Our results indicate a remarkable plasticity of the Nodularia salinity acclimation, and thus salinity strongly impacts the intensity and distribution of cyanobacterial blooms in the Baltic Sea.

  1. Transport and hydraulically-induced recycling of phosphorus in the North Sea-Baltic Sea transition zone

    Directory of Open Access Journals (Sweden)

    Christian Christiansen

    2006-06-01

    Full Text Available Bottom-mounted acoustic Doppler current profiler measurementsindicate that the net transport of water (844 m3 s-1 in theLittle Belt makes up only 6% of the total transport betweenthe Baltic Sea and the North Sea. This is a smaller percentagethan the 9% commonly found in the literature. Owing to barotropicand tidal currents the gross transport is 5 times larger. Thenet transport is directed towards the North Sea mainly in thetop 32 m of the water column but towards the Baltic Sea it occursin the lower 5 m of the water column. The resulting transportof phosphorus is strongly affected by vertical mixing in an areaof hydraulic control in the narrow part of the Little Belt. Comparisonsof phosphorus profiles in stratified waters and in the mixingarea indicate a yearly entrainment of 15 tonnes P from the bottomwater to the surface layer. This vertical transport of P formspart of an internal loop in the general transport between theBaltic Sea and the North Sea. Compared to the transport observed15-16 years ago, the present net phosphorus transport of 163tonnes yr-1 from the Baltic Sea through the Little Belt is substantiallylower.

  2. Composition and Transformation of Dissolved Organic Matter in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Michael Seidel

    2017-05-01

    Full Text Available The processing of terrestrial dissolved organic matter (DOM in coastal shelf seas is an important part of the global carbon cycle, yet, it is still not well understood. One of the largest brackish shelf seas, the Baltic Sea in northern Europe, is characterized by high freshwater input from sub-arctic rivers and limited water exchange with the Atlantic Ocean via the North Sea. We studied the molecular and isotopic composition and turnover of solid-phase extractable (SPE DOM and its transformation along the salinity and redox continuum of the Baltic Sea during spring and autumn. We applied ultrahigh-resolution mass spectrometry and other geochemical and biological approaches. Our data demonstrate a large influx of terrestrial riverine DOM, especially into the northern part of the Baltic Sea. The DOM composition in the central Baltic Sea changed seasonally and was mainly related to autochthonous production by phytoplankton in spring. Especially in the northern, river-dominated basins, a major fraction of riverine DOM was removed, likely by bio- and photo-degradation. We estimate that the removal rate of terrestrial DOM in the Baltic Sea (Bothnian Bay to the Danish Straits/Kattegat area is 1.6–1.9 Tg C per year which is 43–51% of the total riverine input. The export of terrestrial DOM from the Danish Straits/Kattegat area toward the North Sea is 1.8–2.1 Tg C per year. Due to the long residence time of terrestrial DOM in the Baltic Sea (total of ca. 12 years, seasonal variations caused by bio- and photo-transformations and riverine discharge are dampened, resulting in a relatively invariant DOM molecular and isotopic signature exported to the North Sea. In the deep stagnant basins of the Baltic Sea, the DOM composition and dissolved organic nitrogen concentrations changed seasonally, likely because of vertical particle transport and subsequent degradation releasing DOM. DOM in the deep anoxic basins was also enriched in sulfur

  3. Composition and transformation of dissolved organic matter in the Baltic Sea

    Science.gov (United States)

    Seidel, Michael; Manecki, Marcus; Herlemann, Daniel P. R.; Deutsch, Barbara; Schulz-Bull, Detlef; Jürgens, Klaus; Dittmar, Thorsten

    2017-05-01

    The processing of terrestrial dissolved organic matter (DOM) in coastal shelf seas is an important part of the global carbon cycle, yet, it is still not well understood. One of the largest brackish shelf seas, the Baltic Sea in northern Europe, is characterized by high freshwater input from sub-arctic rivers and limited water exchange with the Atlantic Ocean via the North Sea. We studied the molecular and isotopic composition and turnover of solid-phase extractable (SPE) DOM and its transformation along the salinity and redox continuum of the Baltic Sea during spring and autumn. We applied ultrahigh-resolution mass spectrometry and other geochemical and biological approaches. Our data demonstrate a large influx of terrestrial riverine DOM, especially into the northern part of the Baltic Sea. The DOM composition in the central Baltic Sea changed seasonally and was mainly related to autochthonous production by phytoplankton in spring. Especially in the northern, river-dominated basins, a major fraction of riverine DOM was removed, likely by bio- and photo-degradation. We estimate that the removal rate of terrestrial DOM in the Baltic Sea (Bothnian Bay to the Danish Straits/Kattegat area) is 1.6 - 1.9 Tg C per year which is 43 to 51% of the total riverine input. The export of terrestrial DOM from the Danish Straits/Kattegat area towards the North Sea is 1.8 - 2.1 Tg C per year. Due to the long residence time of terrestrial DOM in the Baltic Sea (total of ca. 12 years), seasonal variations caused by bio- and photo-transformations and riverine discharge are dampened, resulting in a relatively invariant DOM molecular and isotopic signature exported to the North Sea. In the deep stagnant basins of the Baltic Sea, the DOM composition and dissolved organic nitrogen concentrations changed seasonally, likely because of vertical particle transport and subsequent degradation releasing DOM. DOM in the deep anoxic basins was also enriched in sulfur-containing organic molecules

  4. Seabird guano fertilizes Baltic Sea littoral food webs.

    Directory of Open Access Journals (Sweden)

    Karine Gagnon

    Full Text Available Nutrient enrichment in coastal marine systems can have profound impacts on trophic networks. In the Baltic Sea, the population of Great Cormorant (Phalacrocorax carbo sinensis has increased nearly exponentially since the mid-1990 s, and colonies of these seabirds can be important sources of nitrogen enrichment for nearby benthic communities due to guano runoff. In this study we used stable isotope analyses and diet mixing models to determine the extent of nitrogen enrichment from cormorant colonies, as well as to examine any possible changes in herbivore diet preferences due to enrichment. We found significantly higher levels of δ(15N in samples from colony islands than control islands for producers (the dominant macroalga Fucus vesiculosus, filamentous algae, and periphyton and herbivores, as well as a positive correlation between enrichment and nest density in colony sites. We also found that enrichment increased over the breeding season of the cormorants, with higher enrichment in late summer than early summer. While the amount of total nitrogen did not differ between colony and control sites, the amount of guano-based nitrogen in algae was >50% in most sites, indicating high nitrogen enrichment from colonies. Herbivores (the isopod Idotea balthica and the gastropod Theodoxus fluviatilis preferred feeding upon the dominant macroalga Fucus vesiculosus rather than on filamentous algae or periphyton in both control and colony, and there was a significant increase in periphyton consumption near colony sites. Overall, guano from cormorant colonies seems to have effects on both producers and herbivores, as well as the potential to modify algae-herbivore interactions.

  5. Mapping Baltic Sea shallow water environments with airborne remote sensing

    Science.gov (United States)

    Vahtmäe, Ele; Kutser, Tiit; Kotta, Jonne; Pärnoja, Merli; Möller, Tiia; Lennuk, Lennart

    2012-11-01

    It is known that the structure of benthic macrophyte and invertebrate habitats indicate the quality of coastal water. Thus, a large-scale analysis of the spatial patterns of coastal marine habitats makes it possible to adequately estimate the status of valuable coastal marine habitats, provide better evidence for environmental changes, and describe the processes behind the changes. Knowing the spatial distribution of benthic habitats is also important from the coastal management point of view. Our previous results clearly demonstrated that remote sensing methods can be used to map water depth and distribution of taxonomic groups of benthic algae (e.g., red, green, and brown algae) in the optically complex coastal waters of the Baltic Sea. We have as well shown that benthic habitat mapping should be done at high spatial resolution owing to the small-scale heterogeneity of such habitats in Estonian coastal waters. Here we tested the capability of high spatial resolution hyperspectral airborne image in its application for mapping benthic habitats. A big challenge is to define appropriate mapping classes that are also meaningful from the ecological point of view. In this study two benthic habitat classification schemes—broader level and finer level—were defined for the study area. The broader level classes were relatively well classified, but discrimination among the units of the finer classification scheme posed a considerable challenge and required a careful approach. Benthic habitat classification provided the highest accuracy in the case of the Spectral Angle Mapper classification method applied to a radiometrically corrected image. Further processing levels, such as spatial filtering and glint correction, decreased the classification accuracy.

  6. Enrichment of omnivorous cercozoan nanoflagellates from coastal Baltic Sea waters.

    Directory of Open Access Journals (Sweden)

    Kasia Piwosz

    Full Text Available Free-living nano-sized flagellates are important bacterivores in aquatic habitats. However, some slightly larger forms can also be omnivorous, i.e., forage upon both bacterial and eukaryotic resources. This hitherto largely ignored feeding mode may have pronounced implications for the interpretation of experiments about protistan bacterivory. We followed the response of an uncultured group of omnivorous cercozoan nanoflagellates from the Novel Clade 2 (Cerc_BAL02 to experimental food web manipulation in samples from the Gulf of Gdańsk (Southern Baltic Sea. Seawater was either prefiltered through 5 µm filters to exclude larger predators of nanoflagellates (F-treatment, or prefiltered and subsequently 1∶10 diluted with sterile seawater (F+D-treatment to stimulate the growth of both, flagellates and bacteria. Initially, Cerc_BAL02 were rapidly enriched under both conditions. They foraged on both, eukaryotic prey and bacteria, and were highly competitive at low concentrations of food. However, these omnivores were later only successful in the F+D treatment, where they eventually represented almost one fifth of all aplastidic nanoflagellates. By contrast, their numbers stagnated in the F-treatment, possibly due to top-down control by a concomitant bloom of other, unidentified flagellates. In analogy with observations about the enrichment of opportunistically growing bacteria in comparable experimental setups we suggest that the low numbers of omnivorous Cerc_Bal02 flagellates in waters of the Gulf of Gdańsk might also be related to their vulnerability to grazing pressure.

  7. Screening of prospective sites for geological storage of CO{sub 2} in the Southern Baltic Sea

    Energy Technology Data Exchange (ETDEWEB)

    Vernon, R.; O' Neil, N.; Pasquali, R. [SLR Consulting, Dublin (Ireland); Nieminen, M.

    2013-05-15

    The BASTOR project focuses on identifying and characterising potential sites for CO{sub 2} storage in the southern Baltic Sea region. A compilation of available digital data from well logs, seismic line data interpretations, mapped structure outlines and published material from existing hydrocarbon fields and identified and mapped structures from Sweden, Poland, Latvia, Lithuania and Kaliningrad have been incorporated into a regional GIS for the Baltic Sea region. A detailed screening of regional sedimentary basins identified the Slupsk Border Zone as having suitable structures for storage of CO{sub 2} in depleted oil and gas fields or saline aquifers. Cambrian sandstone saline aquifers below 900 m have been identified as the principal regional potential storage target with the Dalders Monocline as the most promising area. Eight individual structures were identified as having greatest potential. Detailed 3D geological static models were developed for three of these structures located in offshore Latvia (E6 and E7) and one cross-border structure (Dalders Structure). A theoretical regional CO{sub 2} storage capacity calculation based on the GeoCapacity methodology was undertaken. A regional storage capacity for Cambrian sandstones below 900 m was estimated at a total of 16 Gt, with 2 Gt for the Dalders Monocline. Theoretical storage estimates for individual structures for the Baltic Sea regions includes 760 Mt for the Latvian structures and the Dalders Structure, 9.1 Mt for the structures located in Poland, 31 Mt in Lithuania and 170 Mt in Kaliningrad. These estimates are based on the best available data at the time of writing. However these estimates will be improved upon as new data becomes available from other sources. (orig.)

  8. Long-term trends in abundance of cladocerans in the Central Baltic Sea

    DEFF Research Database (Denmark)

    Möllmann, C.; Köster, Fritz; Kornilovs, G.

    2002-01-01

    Long-term dynamics (1960-1997) of the cladoceran species Bosmina coregoni maritima, Evadne nordmanni and Podon spp. are described for the Gdansk Deep and the Gotland Basin (Central Baltic Sea). By using correlation analyses on seasonal time- series, the influence of temperature and salinity...... on the abundance of cladoceran species was investigated. A clear affinity to higher temperature was found for B. coregoni maritima in summer as well as for E. nordmanni and Podon spp. in spring. In addition to temperature, association tests with salinity revealed besides species-specific preferences, regional...... and temporal differences. Contrary to B. coregoni maritima, both other species were positively associated to salinity in summer and autumn in the Gdansk Deep. In the Gotland Basin only E. nordmanni was positively correlated to salinity in autumn. Differences in the response to hydrographic variables...

  9. Salt tolerance of estuarine benthic macroalgae in the Kattegat-Baltic Sea area

    DEFF Research Database (Denmark)

    Larsen, A.; Sand-Jensen, K.

    2006-01-01

    Tolerance of benthic marine macroalgae to low salinities is believed to be a main determinant of their vertical distribution across the marine coastline and their horizontal distribution from oceanic regions into low-saline bays, fjords and estuaries. Salt tolerance should also be important...... for the distribution of the nearly 400 macroalgal species across the large salinity gradient in the Kattegat-Baltic Sea area ranging from 30 psu at the entrance to 3 psu in the inner parts 1500 km away. Previous evaluations of interspecific differences in salt tolerance in relation to horizontal distribution patterns......, Denmark (salinity: 16 psu, tide 10 cm) to maintain photosynthesis after 4 days exposure to declining salinities (16 to 0 psu). Overall, the algal community had a high short-term tolerance to low salinities because 35 of 44 species maintained more than half the photosynthetic capacity at salinities lower...

  10. Geochemical records of salt-water inflows into the deep basins of the Baltic Sea

    DEFF Research Database (Denmark)

    Neumann, T.; Christiansen, C.; Clasen, S.

    1997-01-01

    The estuarine circulation system of the Baltic Sea promotes stable stratification and bottom water anoxia in sedimentary basins of the Baltic proper. Ingressions of saline, oxygen-rich waters from the North Sea replace the oxygen depleted deep water. Timing and extent of the ingressions vary...... on time-scales of years to decades, and are largely determined by wind-strength and storm frequency over the North Atlantic Ocean and Europe. Mn/Fe-ratios in sediments from a dated sediment core of the Gotland Deep (250 m water depth) record variations in redox conditions that can be linked to historical...

  11. Spatial and temporal habitat partitioning by zooplankton in the Bornholm Basin (central Baltic Sea)

    DEFF Research Database (Denmark)

    Schultz, J.; Peck, M.A.; Barz, K.

    2012-01-01

    The deep basins in the Baltic Sea such as the Bornholm Basin (BB) are subject to seasonal changes in the strength of physico-chemical stratification. These depth-related changes in key abiotic factors are strong drivers of habitat partitioning by the autochthonous zooplankton community. Species...... on a multivariate approach and the evaluation of vertical distribution patterns, five major habitat utilisation modes were identified that were based, to a large extent, on the dynamics of thermal and haline stratification of the Baltic Sea. Our statistical analysis of one of the most thorough datasets collected...

  12. Radiocaesium from Chernobyl in benthic algae along the Swedish Baltic Sea coast

    International Nuclear Information System (INIS)

    Snoeijs, P.

    1993-01-01

    The concentrations of 137 Cs, 134 Cs and 40 K were measured in samples taken from the upper littoral along the Swedish Baltic Sea coast in 1990 and 1991. The results were compared with earlier measurements carried out 1984-1989, and some unpublished data from these years are presented as well. The levels of radiocesium in algae that belong to different algal groups were compared, and the value of different algal species as monitoring organisms for radionuclides in the Baltic Sea was discussed. Suggestions for future monitoring and future research are given. 10 refs, 5 figs, 10 tabs

  13. Climate, zooplankton, and pelagic fish growth in the central Baltic Sea

    DEFF Research Database (Denmark)

    Möllmann, C.; Kornilovs, G.; Fetter, M.

    2005-01-01

    Oceanographic conditions in the brackish central Baltic Sea are strongly linked to atmospheric forcing and the unusual period of persistently strong westerlies that, since the late 1980s, have resulted in an increase in average water temperatures and decreasing salinity. These changes in temperat......Oceanographic conditions in the brackish central Baltic Sea are strongly linked to atmospheric forcing and the unusual period of persistently strong westerlies that, since the late 1980s, have resulted in an increase in average water temperatures and decreasing salinity. These changes...

  14. Reconstructing Holocene temperature and salinity variations in the western Baltic Sea region: a multi-proxy comparison from the Little Belt (IODP Expedition 347, Site M0059

    Directory of Open Access Journals (Sweden)

    U. Kotthoff

    2017-12-01

    Full Text Available Sediment records recovered from the Baltic Sea during Integrated Ocean Drilling Program Expedition 347 provide a unique opportunity to study paleoenvironmental and climate change in central and northern Europe. Such studies contribute to a better understanding of how environmental parameters change in continental shelf seas and enclosed basins. Here we present a multi-proxy-based reconstruction of paleotemperature (both marine and terrestrial, paleosalinity, and paleoecosystem changes from the Little Belt (Site M0059 over the past  ∼  8000 years and evaluate the applicability of inorganic- and organic-based proxies in this particular setting. All salinity proxies (diatoms, aquatic palynomorphs, ostracods, diol index show that lacustrine conditions occurred in the Little Belt until  ∼  7400 cal yr BP. A connection to the Kattegat at this time can thus be excluded, but a direct connection to the Baltic Proper may have existed. The transition to the brackish–marine conditions of the Littorina Sea stage (more saline and warmer occurred within  ∼  200 years when the connection to the Kattegat became established after  ∼  7400 cal yr BP. The different salinity proxies used here generally show similar trends in relative changes in salinity, but often do not allow quantitative estimates of salinity. The reconstruction of water temperatures is associated with particularly large uncertainties and variations in absolute values by up to 8 °C for bottom waters and up to 16 °C for surface waters. Concerning the reconstruction of temperature using foraminiferal Mg  /  Ca ratios, contamination by authigenic coatings in the deeper intervals may have led to an overestimation of temperatures. Differences in results based on the lipid paleothermometers (long chain diol index and TEXL86 can partly be explained by the application of modern-day proxy calibrations to intervals that experienced significant

  15. Impact of the emissions of international sea traffic on airborne deposition to the Baltic Sea and concentrations at the coastline

    Directory of Open Access Journals (Sweden)

    Marke Hongisto

    2014-03-01

    Full Text Available The impact of ship traffic emissions in the Baltic Sea on deposition and airborne concentrations of nitrogen and sulphur compounds in the period 2008--2011 was studied using the Hilatar chemistry transport model with a 0.068° latitude-longitude resolution. An accurate ship emission inventory based on AIS (automatic identification system security signals was used. The uncertainty of the European emission inventories are discussed, as is an inter-comparison of the Baltic Sea airborne load and concentrations with other model-based estimates and with air quality measurements and the effect of the EU sulphur directive for ship emissions on sulphate concentrations.

  16. An integrated fit-for-the-use assessment of marine data adequacy in the Baltic Sea

    Science.gov (United States)

    She, Jun; Novellino, Antonio

    2017-04-01

    The value of data can only be realized when they are used. Therefore one major factor to determine the extent of the value of data is their level of "fitness-for-the-use". The purpose of the Baltic Sea Check Point project is to assess adequacy of the Baltic Sea data in areas of air, water, biota, seabed and human activities for their usages in social-economic benefit areas and marine knowledge generation, which are presented by eleven challenge areas. The data assessed focused mainly on in situ observations but also include satellite observations, model data, human activity data and integrated data by combining models and observations. The eleven challenge areas are wind farm siting, marine protected areas, oil platform leak, climate change, coastal protection, fishery management, fishery impact, eutrophication, riverine inputs, bathymetry and alien species. The assessment is mainly qualitative with focus on the availability and accessibility, e.g. completeness, coverage, resolution and precision when using the data for pre-defined tasks in each challenge areas, e.g., wind farm site suitability design, generate 100 year time series of sea level for the Baltic coastal stretches etc. The procedure of the assessment is taken in four steps: i) to describe the pre-defined data use cases and objectives; ii) to specify data requirements in performing the data use cases; iii) to investigate the data availability and iv) to assess the data adequacy in terms of the "fitness-for-the-use" of data in the selected challenge areas by comparing the data availability with the data requirements. Due to the complexity involved in the assessment, in-situ observations, especially those from EMODnet, are given more focus than other datasets although all the potential data sources from national, regional and European levels are taken into account. For each challenge area, data adequacy for key variables is assessed and outcomes will be reported. Recommendations for major data gaps

  17. Microbial decomposition of terrigenic organic matter discharged into the Baltic Sea

    Science.gov (United States)

    Manecki, M.; Herlemann, D.; Pollehne, F.; Labrenz, M.; Zimmermann, R.; Dittmar, T.; Schulz-Bull, D.; Jürgens, K.

    2012-04-01

    The permafrost soils in arctic regions contain a large amount of the worldwide organic carbon and global warming is expected to increase drainage of dissolved organic matter (DOM) into the adjacent oceans. It is yet unclear how this terrigenic organic matter will influence the global carbon cycle and the feedback effects to the climate. We used the Baltic Sea as a model system to investigate the role of abiotic factors on the degradation of terrigenic dissolved organic matter (tDOM) upon discharge into a brackish system as well as the response of the microbial community. Water from the Kalix River in Northern Sweden, which drains also permafrost soils, was used as the tDOM source in incubation experiments with Baltic Sea water. Different qualities of tDOM were compared by applying concentration procedures: tDOM was added to fresh Baltic Sea water as untreated Kalix River water or concentrated by commonly use DOC concentration procedures (lyophilization, ultrafiltration, solid phase extraction). We investigated the TDOC degradation by parallel measurements of dissolved organic carbon (DOC) consumption, DOM composition (using a 15 Tesla Fourier Transformation Ion Cyclotron Resonance Mass Spectrometer (FT-ICR-MS)), microbial activities and microbial community structure. FT-ICR-MS measurements showed qualitative differences in the DOM compositions for the different treatments and a drastic change in DOM composition between the third and fourth week of the incubation experiment. Despite the qualitative differences in DOM composition, the results obtained so far revealed that the added tDOC had, independent of the previous enrichment procedure, only little influence on bacterial activities, bacterial community structure and DOC decomposition dynamics. This indicates that the major portion of the added tDOC is of refractory nature. Instead, bacterial predation by heterotrophic protists had a strong impact on both bacterial community structure and DOC decomposition

  18. Stickleback increase in the Baltic Sea - A thorny issue for coastal predatory fish

    Science.gov (United States)

    Bergström, Ulf; Olsson, Jens; Casini, Michele; Eriksson, Britas Klemens; Fredriksson, Ronny; Wennhage, Håkan; Appelberg, Magnus

    2015-09-01

    In the Baltic Sea, the mesopredator three-spined stickleback (Gasterosteus aculeatus) spends a large part of its life cycle in the open sea, but reproduces in shallow coastal habitats. In coastal waters, it may occur in high abundances, is a potent predator on eggs and larvae of fish, and has been shown to induce trophic cascades with resulting eutrophication symptoms through regulation of invertebrate grazers. Despite its potential significance for the coastal food web, little is known about its life history and population ecology. This paper provides a description of life history traits, migration patterns and spatiotemporal development of the species in the Baltic Sea during the past decades, and tests the hypothesis that stickleback may have a negative impact on populations of coastal predatory fish. Offshore and coastal data during the last 30 years show that stickleback has increased fourfold in the Bothnian Sea, 45-fold in the Central Baltic Sea and sevenfold in the Southern Baltic Sea. The abundances are similar in the two northern basins, and two orders of magnitude lower in the Southern Baltic Sea. The coastward spawning migration of sticklebacks from offshore areas peaks in early May, with most spawners being two years of age at a mean length of 65 mm. The early juvenile stage is spent at the coast, whereafter sticklebacks perform a seaward feeding migration in early autumn at a size of around 35 mm. A negative spatial relation between the abundance of stickleback and early life stages of perch and pike at coastal spawning areas was observed in spatial survey data, indicating strong interactions between the species. A negative temporal relationship was observed also between adult perch and stickleback in coastal fish monitoring programmes supporting the hypothesis that stickleback may have negative population level effects on coastal fish predators. The recent increase in stickleback populations in different basins of the Baltic Sea in combination with

  19. SST diurnal variability in the North Sea and the Baltic Sea

    DEFF Research Database (Denmark)

    Karagali, Ioanna; Høyer, Jacob; Hasager, Charlotte Bay

    2012-01-01

    Five years of sea surface temperature (SST) retrievals from a geostationary platform are utilised to identify and characterise diurnal warming in the North and Baltic Seas. Observations from the Spinning Enhanced Visible Infrared Imager (SEVIRI) on board the Meteosat Second Generation satellite...... temperature anomalies. The best night-time reference field candidate is demonstrated to be an average of 3days of satellite observations from local midnight to 0300. When compared against night-time in situ measurements from various locations, mean biases are found in the order of ±0.1K and standard deviation...... (σ) between 0.4K and 0.9K. The 5year record with daytime temperature anomalies is used to derive robust statistical description of duration, spatial extent, proximity to coast and water depth of the diurnal warming events. Seasonal and inter-annual variations in the diurnal warming are also...

  20. Long-term changes in the seasonality of Baltic sea level

    Directory of Open Access Journals (Sweden)

    Susana M. Barbosa

    2016-06-01

    Full Text Available The seasonal cycle accounts for about 40% of the total sea level variability in the Baltic Sea. In a climate change context, changes are expected to occur, not only in mean levels but also in the seasonal characteristics of sea level. The present study addresses the quantification of changes in the seasonal cycle of sea level from a set of century-long tide gauge records in the Baltic Sea. In order to obtain robust estimates of the changes in amplitude and phase of the seasonal cycle, we apply different methods, including continuous wavelet filtering, multi-resolution decomposition based on the maximal overlap discrete wavelet transform, auto-regressive-based decomposition, singular spectrum analysis and empirical mode decomposition. The results show that all methods generally trace a similar long-term variability of the annual cycle amplitudes, and we focus on discrete wavelet analysis as the natural counterpart of classical moving Fourier analysis. In contrast to previous studies suggesting the existence of long-term changes in the seasonal cycle, in particular an increase of the annual amplitude, we find alternating periods of high and low amplitudes without any clear indication of systematic long-term trends. The derived seasonal patterns are spatially coherent, discriminating the stations in the Baltic entrance from the remaining stations in the Baltic basin, for which zonal wind accounts for typically more than 40% of the variations in amplitude.

  1. Sources, transport, reservoirs and fate of dioxins, PCBs and HCB in the Baltic Sea environment

    Energy Technology Data Exchange (ETDEWEB)

    Wiberg, Karin (Dept. of Chemistry, Umeaa Univ., Umeaa (Sweden)); McLachlan, Michael; Jonsson, Per (Dept. of Applied Environmental Science, Stockholm Univ., Stockholm (Sweden)); Johansson, Niklas (Swedish Environmental Protection Agency, Stockholm (Sweden)) (and others)

    2009-01-15

    A better knowledge of sources, transport, reservoirs and fate of persistent organic pollutants (POPs) in the Baltic Sea environment is crucial for the identification of effective actions against these compounds. In this report the present situation regarding sources and current fluxes of persistent pollutants in the Baltic Sea ecosystem is presented. The compounds selected for the study were: polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB), polychlorinated dibenzofurans (PCDFs) and polychlorinated dibenzo-p-dioxins (PCDDs). These classes of compounds represent a broad range of physical-chemical properties, and hence their environmental behaviour encompasses the spectrum of most chemicals listed in the Stockholm Convention. Based on current knowledge and some new field measurements in air, sea water and sediments, mass balances for the selected POPs were calculated. These mass balances indicate that the atmosphere is the major source of PCDD/Fs to the Bothnian Sea and the Baltic Proper and also the dominant external source of HCB and PCBs to the Baltic Sea. These findings emphasise the need for further international agreements to prevent long-range transboundary transport of these POPs

  2. Emergence of the Zoonotic Biliary Trematode Pseudamphistomum truncatum in Grey Seals (Halichoerus grypus in the Baltic Sea.

    Directory of Open Access Journals (Sweden)

    Aleksija S Neimanis

    Full Text Available The biliary trematode Pseudamphistomum truncatum parasitizes a wide range of fish-eating mammals, including humans. Here we report the emergence of this parasite in grey seals (Halichoerus grypus in the Baltic Sea. One hundred eighty-three of 1 554 grey seals (11.9% examined from 2002-2013 had detectable hepatobiliary trematode infection. Parasite identification was confirmed as P. truncatum by sequencing the ITS2 region of a pool of five to 10 trematodes from each of ten seals collected off the coast of seven different Swedish counties. The proportion of seals parasitized by P. truncatum increased significantly over time and with increasing age of seals. Males were 3.1 times more likely to be parasitized than females and animals killed in fishery interactions were less likely to be parasitized than animals found dead or hunted. There was no significant difference in parasitism of seals examined from the Gulf of Bothnia versus those examined from the Baltic Proper. Although the majority of infections were mild, P. truncatum can cause severe hepatobiliary disease and resulted in liver failure in at least one seal. Because cyprinid fish are the second intermediate host for opisthorchiid trematodes, diets of grey seals from the Baltic Sea were analysed regarding presence of cyprinids. The proportion of gastrointestinal tracts containing cyprinid remains was ten times higher in seals examined from 2008 to 2013 (12.2% than those examined from 2002 to 2007 (1.2% and coincided with a general increase of trematode parasitism in the host population. The emergence and relatively common occurrence of P. truncatum in grey seals signals the presence of this parasite in the Baltic Sea ecosystem and demonstrates how aquatic mammals can serve as excellent sentinels of marine ecosystem change. Investigation of drivers behind P. truncatum emergence and infection risk for other mammals, including humans, is highly warranted.

  3. Emergence of the Zoonotic Biliary Trematode Pseudamphistomum truncatum in Grey Seals (Halichoerus grypus) in the Baltic Sea

    Science.gov (United States)

    Bergman, Anders; Bignert, Anders; Höglund, Johan; Lundström, Karl; Strömberg, Annika; Bäcklin, Britt-Marie

    2016-01-01

    The biliary trematode Pseudamphistomum truncatum parasitizes a wide range of fish-eating mammals, including humans. Here we report the emergence of this parasite in grey seals (Halichoerus grypus) in the Baltic Sea. One hundred eighty-three of 1 554 grey seals (11.9%) examined from 2002–2013 had detectable hepatobiliary trematode infection. Parasite identification was confirmed as P. truncatum by sequencing the ITS2 region of a pool of five to 10 trematodes from each of ten seals collected off the coast of seven different Swedish counties. The proportion of seals parasitized by P. truncatum increased significantly over time and with increasing age of seals. Males were 3.1 times more likely to be parasitized than females and animals killed in fishery interactions were less likely to be parasitized than animals found dead or hunted. There was no significant difference in parasitism of seals examined from the Gulf of Bothnia versus those examined from the Baltic Proper. Although the majority of infections were mild, P. truncatum can cause severe hepatobiliary disease and resulted in liver failure in at least one seal. Because cyprinid fish are the second intermediate host for opisthorchiid trematodes, diets of grey seals from the Baltic Sea were analysed regarding presence of cyprinids. The proportion of gastrointestinal tracts containing cyprinid remains was ten times higher in seals examined from 2008 to 2013 (12.2%) than those examined from 2002 to 2007 (1.2%) and coincided with a general increase of trematode parasitism in the host population. The emergence and relatively common occurrence of P. truncatum in grey seals signals the presence of this parasite in the Baltic Sea ecosystem and demonstrates how aquatic mammals can serve as excellent sentinels of marine ecosystem change. Investigation of drivers behind P. truncatum emergence and infection risk for other mammals, including humans, is highly warranted. PMID:27755567

  4. Emergence of the Zoonotic Biliary Trematode Pseudamphistomum truncatum in Grey Seals (Halichoerus grypus) in the Baltic Sea.

    Science.gov (United States)

    Neimanis, Aleksija S; Moraeus, Charlotta; Bergman, Anders; Bignert, Anders; Höglund, Johan; Lundström, Karl; Strömberg, Annika; Bäcklin, Britt-Marie

    2016-01-01

    The biliary trematode Pseudamphistomum truncatum parasitizes a wide range of fish-eating mammals, including humans. Here we report the emergence of this parasite in grey seals (Halichoerus grypus) in the Baltic Sea. One hundred eighty-three of 1 554 grey seals (11.9%) examined from 2002-2013 had detectable hepatobiliary trematode infection. Parasite identification was confirmed as P. truncatum by sequencing the ITS2 region of a pool of five to 10 trematodes from each of ten seals collected off the coast of seven different Swedish counties. The proportion of seals parasitized by P. truncatum increased significantly over time and with increasing age of seals. Males were 3.1 times more likely to be parasitized than females and animals killed in fishery interactions were less likely to be parasitized than animals found dead or hunted. There was no significant difference in parasitism of seals examined from the Gulf of Bothnia versus those examined from the Baltic Proper. Although the majority of infections were mild, P. truncatum can cause severe hepatobiliary disease and resulted in liver failure in at least one seal. Because cyprinid fish are the second intermediate host for opisthorchiid trematodes, diets of grey seals from the Baltic Sea were analysed regarding presence of cyprinids. The proportion of gastrointestinal tracts containing cyprinid remains was ten times higher in seals examined from 2008 to 2013 (12.2%) than those examined from 2002 to 2007 (1.2%) and coincided with a general increase of trematode parasitism in the host population. The emergence and relatively common occurrence of P. truncatum in grey seals signals the presence of this parasite in the Baltic Sea ecosystem and demonstrates how aquatic mammals can serve as excellent sentinels of marine ecosystem change. Investigation of drivers behind P. truncatum emergence and infection risk for other mammals, including humans, is highly warranted.

  5. Characteristics of cyclones causing extreme sea levels in the northern Baltic Sea** The study was supported by the Estonian Ministry of Education and Research (IUT20-11 and Grant ETF9134 and by the EU Regional Development Foundation, Environmental Conservation and Environmental Technology R&D Programme Project No. 3.2.0801.12-0044.

    Directory of Open Access Journals (Sweden)

    Piia Post

    2014-01-01

    Full Text Available The basic parameters of extra-tropical cyclones in the northern Baltic are examined in relation to extreme sea level events at Estonian coastal stations between 1948 and 2010. The hypothesis that extreme sea level events might be caused not by one intense extra-tropical cyclone, as suggested by earlier researchers, but by the temporal clustering of cyclones in a certain trajectory corridor, is tested. More detailed analysis of atmospheric conditions at the time of the two most extreme cases support this concept: the sequence of 5 cyclones building up the extreme sea level within about 10 days was very similar in structure and periodicity.

  6. Comparison of primary productivity estimates in the Baltic Sea based on the DESAMBEM algorithm with estimates based on other similar algorithms

    Directory of Open Access Journals (Sweden)

    Małgorzata Stramska

    2013-02-01

    Full Text Available The quasi-synoptic view available from satellites has been broadly used in recent years to observe in near-real time the large-scale dynamics of marine ecosystems and to estimate primary productivity in the world ocean. However, the standard global NASA ocean colour algorithms generally do not produce good results in the Baltic Sea. In this paper, we compare the ability of seven algorithms to estimate depth-integrated daily primary production (PP, mg C m-2 in the Baltic Sea. All the algorithms use surface chlorophyll concentration, sea surface temperature, photosynthetic available radiation, latitude, longitude and day of the year as input data. Algorithm-derived PP is then compared with PP estimates obtained from 14C uptake measurements. The results indicate that the best agreement between the modelled and measured PP in the Baltic Sea is obtained with the DESAMBEM algorithm. This result supports the notion that a regional approach should be used in the interpretation of ocean colour satellite data in the Baltic Sea.

  7. Dissolved organic phosphorus and its bioavailable fraction in the Baltic Sea

    Science.gov (United States)

    Nausch, M.; Nausch, G.; Setzkorn, D.; Welz, Ä.

    2009-04-01

    shortage. DOP concentrations of 0.54 µM exceeding this range has been detected in a spring bloom. BAP concentrations ranged between 0.02 and 0.34 µM comprising a proportion between 9 and 61% of the DOP. The amount of BAP was strongly correlated with the ambient DOP concentrations at the beginning of the experiments and can be described by the equation: BAP= (0.92* DOP)-0.14. The regression slope of 0.92 indicated that all DOP above the intercept with the abscissa is bioavailable and those variations in DOP were caused by fluctuations in BAP. The remaining refractory DOP varied between 0.13 and 0.20µM and did not vary seasonally. Parallel experiments in 2005 without carbon and nitrogen additions reveal the BAP utilization by heterotrophic bacteria under natural conditions. The bacterial uptake of BAP ranged between 18 and 78% and reached 100% during the summer bloom of diazotrophic cyanobacteria. BAP utilization despite the availability of DIP indicates that phosphorus uptake may be often carbon and/or nitrogen limited and the BAP could satisfy bacterial carbon or nitrogen demand. The limitation was repressed during the summer bloom of diazotrophioc cyanobacteria. Here the BAP fulfils the phosphorus demand. The spatial variability of DOP concentrations in summer 2008 shows a gradient in DOP concentrations from south to north. In the southern and central Baltic Sea, DOP values in the surface ranged between 0.25 and 0.39 µM. In the Gulf of Finland, concentrations of around 0.25 µM were found. In the Gulf of Bothnia, characterized by a phosphate limitation especially in the northern part, DOP concentrations decreased from 0.20 µM in the southernmost part down to 0.12 µM in the northernmost region. BAP amounted between 8% and 57% of DOP. High BAP proportions were detected in the Bornholm Basin (57%) and the Gulf of Finland (45%). The lowest percentage (8 %) was found in the northernmost part in the Gulf of Bothnia. Differing from the results in the central Baltic Sea in

  8. 36 year trends in dissolved organic carbon export from Finnish rivers to the Baltic Sea.

    Science.gov (United States)

    Räike, Antti; Kortelainen, Pirkko; Mattsson, Tuija; Thomas, David N

    2012-10-01

    Increasing dissolved organic carbon (DOC) concentrations in lakes, rivers and streams in northern mid latitudes have been widely reported during the last two decades, but relatively few studies have dealt with trends in DOC export. We studied the export of DOC from Finnish rivers to the Baltic Sea between 1975 and 2010, and estimated trends in DOC fluxes (both flow normalised and non-normalised). The study encompassed the whole Finnish Baltic Sea catchment area (301,000 km(2)) covering major land use patterns in the boreal zone. Finnish rivers exported annually over 900,000 t DOC to the Baltic Sea, and the mean area specific export was 3.5 t km(-2). The highest export (7.3t km(-2)) was measured in peat dominated catchments, whereas catchments rich in lakes had the lowest export (2.2 t km(-2)). Inter-annual variation in DOC export was high and controlled mainly by hydrology. There was no overall trend in the annual water flow, although winter flow increased in northern Finland over 36 years. Despite the numerous studies showing increases in DOC concentrations in streams and rivers in the northern hemisphere, we could not find any evidence of increases in DOC export to the northern Baltic Sea from Finnish catchments since 1975. Copyright © 2012 Elsevier B.V. All rights reserved.

  9. Heavy metals in the Baltic Sea - a problem for toxicologists or for chemists?

    International Nuclear Information System (INIS)

    Kremling, K.

    1993-01-01

    Ignorance and failure to see natural processes for what they are is a growing problem in environmental debates. The Baltic is a typical example of discussions about marine pollution. In awareness of this problem, the author gives a detailed description of the hydrographical and hydrochemical conditions in the Baltic Sea before dealing exhaustively with the chemical behaviour of selected heavy metals (cadmium, copper, nickel, uranium, molybdenum, cobalt, iron, and manganese). Neither phytoplankton nor zooplankton nor higher organisms show signs of acute toxicity. A comparison between Baltic Sea water and drinking water in Kiel with regard to concentrations in both cases yields values well below the limit values of the Ordinance on Drinking Water. Heavy metal accumulation in fish is about equal to that in the North Sea. Sediment analyses confirm that heavy metal concentrations in the Baltic Sea have steadily rise over the past 100 years. At present it is not possible to answer questions on the environmental impact, that is, the chronic toxicity of these elements. (orig./UHE) [de

  10. Impact of climate change on fish population dynamics in the baltic sea: a dynamical downscaling investigation

    DEFF Research Database (Denmark)

    Mackenzie, Brian R; Meier, H E Markus; Lindegren, Martin

    2012-01-01

    and the temperature have influenced recruitment for at least 50 years. The three Baltic Sea models estimate relatively similar developments (increases) in biomass and fishery yield during twenty-first century climate change (ca. 28 % range among models). However, this uncertainty is exceeded by the one associated...

  11. Water circulation and recharge pathways of coastal lakes along the southern Baltic Sea in northern Poland

    Directory of Open Access Journals (Sweden)

    Cieśliński Roman

    2016-12-01

    Full Text Available The purpose of this paper is to describe water circulation patterns for selected lakes found along the Baltic coast in northern Poland and to determine primary recharge mechanisms or pathways that produce an influx or loss of lake water. A secondary purpose of the paper is to determine the magnitude of recharge for each studied source of water – river water influx, surface runoff from direct catchments, forced influx from polders surrounding lakes, and periodic marine water intrusions from the nearby Baltic Sea. It is also important to determine the magnitude of water outflow from lakes to the sea via existing linkages as well as to compare horizontal influx and outflow data. The study area consisted of five lakes located along the Baltic Sea in northern Poland: Łebsko, Gardno, Bukowo, Kopań, Resko Przymorskie. The main driving force of the studied lakes are large rivers that drain lake catchment areas and periodic brackish water intrusions by the Baltic Sea.

  12. Even low to medium nitrogen deposition impacts vegetation of dry, coastal dunes around the Baltic Sea

    NARCIS (Netherlands)

    Remke, E.; Brouwer, E.; Kooijman, A.; Blindow, I.; Esselink, H.; Roelofs, J.G.M.

    2009-01-01

    Coastal dunes around the Baltic Sea have received small amounts of atmospheric nitrogen and are rather pristine ecosystems in this respect. In 19 investigated dune sites the atmospheric wet nitrogen deposition is 3-8 kg N ha−1 yr−1. The nitrogen content of Cladonia portentosa appeared to be a

  13. Valuing the commons: An international study on the recreational benefits of the Baltic Sea.

    Science.gov (United States)

    Czajkowski, Mikołaj; Ahtiainen, Heini; Artell, Janne; Budziński, Wiktor; Hasler, Berit; Hasselström, Linus; Meyerhoff, Jürgen; Nõmmann, Tea; Semeniene, Daiva; Söderqvist, Tore; Tuhkanen, Heidi; Lankia, Tuija; Vanags, Alf; Zandersen, Marianne; Żylicz, Tomasz; Hanley, Nick

    2015-06-01

    The Baltic Sea provides benefits to all of the nine nations along its coastline, with some 85 million people living within the catchment area. Achieving improvements in water quality requires international cooperation. The likelihood of effective cooperation is known to depend on the distribution across countries of the benefits and costs of actions needed to improve water quality. In this paper, we estimate the benefits associated with recreational use of the Baltic Sea in current environmental conditions using a travel cost approach, based on data from a large, standardized survey of households in each of the 9 Baltic Sea states. Both the probability of engaging in recreation (participation) and the number of visits people make are modeled. A large variation in the number of trips and the extent of participation is found, along with large differences in current annual economic benefits from Baltic Sea recreation. The total annual recreation benefits are close to 15 billion EUR. Under a water quality improvement scenario, the proportional increases in benefits range from 7 to 18% of the current annual benefits across countries. Depending on how the costs of actions are distributed, this could imply difficulties in achieving more international cooperation to achieve such improvements. Copyright © 2015 Elsevier Ltd. All rights reserved.

  14. Diversity of pico- to mesoplankton along the 2000 km salinity gradient of the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Yue O.O. Hu

    2016-05-01

    Full Text Available Microbial plankton form the productive base of both marine and freshwater ecosystems and are key drivers of global biogeochemical cycles of carbon and nutrients. Plankton diversity is immense with representations from all major phyla within the three domains of life. So far, plankton monitoring has mainly been based on microscopic identification, which has limited sensitivity and reproducibility, not least because of the numerical majority of plankton being unidentifiable under the light microscope. High-throughput sequencing of taxonomic marker genes offers a means to identify taxa inaccessible by traditional methods; thus, recent studies have unveiled an extensive previously unknown diversity of plankton. Here, we conducted ultra-deep Illumina sequencing (average 105 sequences/sample of rRNA gene amplicons of surface water eukaryotic and bacterial plankton communities sampled in summer along a 2000 km transect following the salinity gradient of the Baltic Sea. Community composition was strongly correlated with salinity for both bacterial and eukaryotic plankton assemblages, highlighting the importance of salinity for structuring the biodiversity within this ecosystem. In contrast, no clear trends in alpha-diversity for bacterial or eukaryotic communities could be detected along the transect. The distribution of major planktonic taxa followed expected patterns as observed in monitoring programs, but groups novel to the Baltic Sea were also identified, such as relatives to the coccolithophore Emiliana huxleyi detected in the northern Baltic Sea. This study provides the first ultra-deep sequencing-based survey on eukaryotic and bacterial plankton biogeography in the Baltic Sea.

  15. Microplastics and biogeochemical relationships in sediments from Skagerrak, Kattegat and Baltic Sea

    DEFF Research Database (Denmark)

    Strand, Jakob; Lassen, Pia; Shashoua, Yvonne

    This study is a first attempt in Denmark on assessing the presence of microplastics in our open & coastal waters from Baltic to North Sea. Among the conclusions: - Microplastic particles can be found in sediment in Danish waters and is a potential indicator for MSFD. - Normalisation to %TOC...

  16. Ecohydrodynamic model of the Baltic Sea. Part 1. Description of the ProDeMo model

    Directory of Open Access Journals (Sweden)

    Bogdan Ołdakowski

    2005-12-01

    Full Text Available The ProDeMo (Production and Destruction of Organic Matter Model, a 3D coupled hydrodynamic-ecological model, was formulated and applied to the whole Baltic Sea and the subregion of the Gulf of Gdansk. It describes nutrient cycles (phosphorus, nitrogen, silicon through the food web with 15 state variables, oxygen conditions and the parameterisation of water-sediment interactions. The present version of the model takes two groups of phytoplankton - diatoms and non-diatoms - as well as zooplankton into consideration. It covers the flow of matter and energy in the sea, including river discharges and atmospheric deposition. Numerical applications are embedded on a 1 NM grid for the Gulf of Gdansk and a 5 NM grid for the Baltic Sea.     Since the model results largely concur with observations, the model can be regarded as a reliable tool for analysing the behaviour of the Baltic ecosystem. Some examples of the spatial-temporal variability of the most important biological and chemical parameters are presented. The model results are compared with those of other modelling research in the Baltic Sea.     Both the ProDeMo model algorithm and its computing procedures need to be further developed. The next version should therefore enable more phytoplankton groups to be defined, for example cyanobacteria, which are able to take up molecular nitrogen from the atmosphere (nitrogen fixation. Additionally, the sediment phase should be divided into active and non-active layers.

  17. Summer inputs of riverine nutrients to the Baltic Sea: Bioavailability and eutrophication relevance

    DEFF Research Database (Denmark)

    Stepanauskas, R.; Jørgensen, N.O.G.; Eigaard, Ole Ritzau

    2002-01-01

    of the Baltic Sea watershed, with respect to summer concentrations, chemical composition, and biological availability of N and P. The broad spectrum of rivers studied enabled us to assess whether the input of terrigenous organic matter can be an important nutrient source, at various levels of anthropogenic...

  18. Environmental genotoxicity and cytotoxicity in the offshore zones of the Baltic and the North Seas.

    Science.gov (United States)

    Rybakovas, Aleksandras; Barsiene, Janina; Lang, Thomas

    2009-12-01

    Micronuclei (MN), nuclear buds (NB) and fragmented-apoptotic cells (FA) were analyzed in mature peripheral blood and immature cephalic kidney erythrocytes of flounder (Platichthys flesus), dab (Limanda limanda) and cod (Gadus morhua) from 12 offshore sites in the Baltic Sea (479 specimens) and 11 sites in the North Sea (291 specimens), which were collected during three research vessel cruises in December 2002, 2003 and in September 2004. The highest levels of environmental genotoxicity (frequencies of MN up to 0.5 per thousand, NB - up to 0.75 per thousand) and cytotoxicity (FA - up to 0.53 per thousand) were observed in flatfishes from areas close to oil and gas platforms in the North Sea and in zones related to the extensive shipping and potentially influenced by contamination from large European Rivers (Elbe, Vistula, Oder). In dab from the offshore zones of the North Sea, the levels of nuclear abnormalities were higher as compared to those in dab from the Baltic Sea. Responses in immature kidney erythrocytes were higher than in mature erythrocytes from peripheral blood. MN frequency lower than 0.05 per thousand (the Baltic Sea) and lower than 0.1 per thousand (the North Sea) could be suspected as a reference level in the peripheral blood erythrocytes of flatfish.

  19. Ice formation and growth shape bacterial community structure in Baltic Sea drift ice.

    Science.gov (United States)

    Eronen-Rasimus, Eeva; Lyra, Christina; Rintala, Janne-Markus; Jürgens, Klaus; Ikonen, Vilma; Kaartokallio, Hermanni

    2015-02-01

    Drift ice, open water and under-ice water bacterial communities covering several developmental stages from open water to thick ice were studied in the northern Baltic Sea. The bacterial communities were assessed with 16S rRNA gene terminal-restriction fragment length polymorphism and cloning, together with bacterial abundance and production measurements. In the early stages, open water and pancake ice were dominated by Alphaproteobacteria and Actinobacteria, which are common bacterial groups in Baltic Sea wintertime surface waters. The pancake ice bacterial communities were similar to the open-water communities, suggesting that the parent water determines the sea-ice bacterial community in the early stages of sea-ice formation. In consolidated young and thick ice, the bacterial communities were significantly different from water bacterial communities as well as from each other, indicating community development in Baltic Sea drift ice along with ice-type changes. The thick ice was dominated by typical sea-ice genera from classes Flavobacteria and Gammaproteobacteria, similar to those in polar sea-ice bacterial communities. Since the thick ice bacterial community was remarkably different from that of the parent seawater, results indicate that thick ice bacterial communities were recruited from the rarer members of the seawater bacterial community. © FEMS 2014. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  20. Trend Analysis of Nitrogen Deposition to Baltic Sea and its sub basins

    Science.gov (United States)

    Semeena, V. S.; Jerzy, Bartnicki

    2009-04-01

    Since the beginning of last century, Baltic Sea has changed from a clear-water sea into a eutrophic marine environment. Eutrophication is the major problem in the Baltic Sea. Excessive nitrogen and phosphorus loads coming from land-based sources within and outside the catchment area of the bordering countries of the Baltic Sea are the main cause of the eutrophication in the sea. Even though a major part of nitrogen(75%) and phosphorus load(95%) enter the sea via rivers or as water-born discharges, 25% of the nitrogen load comes as atmospheric deposition. Numerical models are the best tools to measure atmospheric deposition into sea waters. We have used the latest version of the Unified EMEP model - which has been developed at the EMEP/MSC-W (Meteorological Synthesizing Centre - West of EMEP) for simulating atmospheric transport and deposition of acidifying and eutrophying compounds as well as photo-oxidants in Europe- to study the trends in atmospheric deposition of nitrogen into Baltic Sea for the period 1995-2006. The model domain covers Europe and the Atlantic Ocean. The model grid (of the size 170×133) has a horizontal resolution of 50 km at 60o N, which is consistent with the resolution of emission data reported to CLRTAP. Approximately 10 of these layers are placed below 2 km to obtain high resolution of the boundary layer which is of special importance to the long range transport of air pollution. EMEP model has been thouroughly validated (Fagerli et.al.[1], Simpson et.al.[2], Simpson et.al.[3] ) The contribution of deposition of nitrogen into Baltic Sea from each of the bordering countries of the Baltic Sea and the deposition trends for the period 1995-2006 has been analysed and the results will be presented. References: [1]. Fagerli H., Simpson D. and Aas W.: Model performance for sulphur and nitrogen compounds for the period 1980 to 2000. [In:] L. Tarraśon, (editor), Transboundary Acidification, Eutrophication and Ground Level Ozone in Europe. EMEP

  1. Baltic Sea coccolithophores - an overview of insights into their taxonomy and ecology from the last 40 years

    DEFF Research Database (Denmark)

    Thomsen, Helge Abildhauge

    2016-01-01

    saturation of the Baltic Sea is the main controlling feature, and that in particular an undersaturation during wintertime remains the critical bottleneck for coccolithophores to prevail in the Baltic proper. While there is no reason to question these observations, it is still relevant to put on record......, the Sounds and the Kattegat of a contingent of coccolithophores that appear to be either persistently present within the area or episodically occurring as determined by larger scale hydrographical events within the North Sea/Baltic Sea confluence area....

  2. Isotopic evidence for the formation of unusually humus-rich soils in the Baltic region

    Science.gov (United States)

    Leinweber, Peter; Acksel, Andre; Kühn, Peter

    2017-04-01

    Arable mineral soils in the Pleistocene landscape of Northern Germany usually contain about 4 to 8 kg of organic C (Corg) per m2, most of which is visually recognizable concentrated in the tilled topsoil horizon. Some unusually humus-rich (10 to 20 kg Corg m-2), and deeply (> 70 cm) dark-colored soils in coastal regions with mollic properties have been classified as Chernozems. Their location far away from the middle German and Central European Chernozem regions, absence of steppe vegetation and semi-arid climate conditions make classical pedogenetic theories doubtful. However, non-targeted mass spectrometric analyses of soil organic matter (SOM) composition revealed great similarities with typical Chernozems worldwide (Thiele-Bruhn et al., 2014) and made alternative (e.g. waterlogged) pathways of SOM accumulation unlikely. Subsequent detailed multi-method SOM analyses down the soil profiles revealed relative enrichments in cyclic ("black carbon") and heterocyclic organic compounds in the deeper, bioturbated horizons. These were plausibly explained by the input of combustion residues, likely originating from anthropogenic activities because spots of these soils coincided with archeological artifacts of early settlements (Acksel et al., 2016). However, these finding could not completely explain the genesis of Chernozems in the Baltic region. Therefore, we actually explored isotope analyses (12/13C, 13/14C, 14/15N, 32/34S) to find out the origin of these unusual SOM enrichments and the time period in which it occurred. The results will be compiled to a consistent hypothesis on the formation of these soils in the Baltic and other Northern European regions. References Acksel, A., W. Amelung, P. Kühn, E. Gehrt, T. Regier, P. Leinweber. 2016. Soil organic matter characteristics as indicator of Chernozem genesis in the Baltic Sea region. Geoderma Regional 7, 187-200. Thiele-Bruhn, S., Leinweber P., Eckhardt K.-U., Siem H.K., Blume H.-P. 2014. Identifying Chernozem

  3. Fifth Baltic Sea pollution load compilation (PLC-5). An executive summary

    Energy Technology Data Exchange (ETDEWEB)

    Svendsen, L.M.; Staaf, H.; Pyhala, M.; Kotilainen, P.; Bartnicki, J.; Knuuttila, S.; Durkin, M.

    2012-07-01

    This report summarizes and combines the main results of the Fifth Baltic Sea Pollution Load Compilation (HELCOM 2011) which covers waterborne loads to the sea and data on atmospheric loads which are submitted by countries to the co-operative programme for monitoring and evaluation of the long range transmission of air pollutants in Europe (EMEP), which subsequently compiles and reports this information to HELCOM.

  4. Projected change in atmospheric nitrogen deposition to the Baltic Sea towards 2020

    Science.gov (United States)

    Geels, C.; Hansen, K. M.; Christensen, J. H.; Ambelas Skjøth, C.; Ellermann, T.; Hedegaard, G. B.; Hertel, O.; Frohn, L. M.; Gross, A.; Brandt, J.

    2012-03-01

    The ecological status of the Baltic Sea has for many years been affected by the high input of both waterborne and airborne nutrients. The focus here is on the airborne input of nitrogen (N) and the projected changes in this input, assuming the new National Emission Ceilings directive (NEC-II), currently under negotiation in the EU, is fulfilled towards the year 2020. With a set of scenario simulations, the Danish Eulerian Hemispheric Model (DEHM) has been used to estimate the development in nitrogen deposition based on present day meteorology combined with present day (2007) or future (2020) anthropogenic emissions. Applying a so-called tagging method in the DEHM model, the contribution from ship traffic and from each of the nine countries with coastlines to the Baltic Sea has been assessed. The annual deposition to the Baltic Sea is estimated to 203 k tonnes N for the present day scenario (2007) and 165 k tonnes N in the 2020 scenario, giving a projected reduction of 38 k tonnes N in the annual load in 2020. This equals a decline in nitrogen deposition of 19%. The results from 20 model runs using the tagging method show that of the total nitrogen deposition in 2007, 52% came from emissions within the bordering countries. By 2020, this is projected to decrease to 48%. For some countries the projected decrease in nitrogen deposition arising from the implementation of the NEC-II directive will contribute significantly to compliance with the reductions agreed on in the provisional reduction targets of the Baltic Sea Action Plan. This underlines the importance of including projections like the current in future updates of the Baltic Sea Action Plan.

  5. Projected change in atmospheric nitrogen deposition to the Baltic Sea towards 2020

    Directory of Open Access Journals (Sweden)

    C. Geels

    2012-03-01

    Full Text Available The ecological status of the Baltic Sea has for many years been affected by the high input of both waterborne and airborne nutrients. The focus here is on the airborne input of nitrogen (N and the projected changes in this input, assuming the new National Emission Ceilings directive (NEC-II, currently under negotiation in the EU, is fulfilled towards the year 2020. With a set of scenario simulations, the Danish Eulerian Hemispheric Model (DEHM has been used to estimate the development in nitrogen deposition based on present day meteorology combined with present day (2007 or future (2020 anthropogenic emissions. Applying a so-called tagging method in the DEHM model, the contribution from ship traffic and from each of the nine countries with coastlines to the Baltic Sea has been assessed. The annual deposition to the Baltic Sea is estimated to 203 k tonnes N for the present day scenario (2007 and 165 k tonnes N in the 2020 scenario, giving a projected reduction of 38 k tonnes N in the annual load in 2020. This equals a decline in nitrogen deposition of 19%. The results from 20 model runs using the tagging method show that of the total nitrogen deposition in 2007, 52% came from emissions within the bordering countries. By 2020, this is projected to decrease to 48%. For some countries the projected decrease in nitrogen deposition arising from the implementation of the NEC-II directive will contribute significantly to compliance with the reductions agreed on in the provisional reduction targets of the Baltic Sea Action Plan. This underlines the importance of including projections like the current in future updates of the Baltic Sea Action Plan.

  6. Major Environmental Issues of the Baltic Sea and Science Based Decision Support Strategies towards an Improved Environmental Status

    Science.gov (United States)

    Humborg, C.

    2017-12-01

    The Baltic Sea is especially susceptible to multiple human impacts due to its estuarine mixing patterns and long water residence times. Temporally and spatially, it is one of the best investigated marginal seas worldwide allowing for a deep knowledge of natural and human processes forming this unique brackish ecosystem. In this presentation, we shortly summarize the physical, biogeochemical and ecological settings of the Baltic Sea and address major human drivers and pressures threatening its ecosystem. Further, we summarize the scientific and political efforts that led to the formulation of Baltic Sea Action Plan, a milestone for eutrophication management and European environmental governance. Further, we summarize the efforts and societal pitfalls towards an Ecosystem Based Fisheries Management, strategies to decrease loads of environmental pollutants and management of marine biodiversity/habitat issues in the unique Baltic Sea context.

  7. Impact of 21st century climate change on the Baltic Sea fish community and fisheries

    DEFF Research Database (Denmark)

    MacKenzie, Brian; Gislason, Henrik; Möllmann, C.

    2007-01-01

    reviewed. We then use recent regional - scale climate - ocean modelling results to consider how climate change during this century will affect the fish community of the Baltic and fisheries management. Expected climate changes in northern Europe will likely affect both the temperature and salinity...... of the Baltic, causing it to become warmer and fresher. As an estuarine ecosystem with large horizontal and vertical salinity gradients, biodiversity will be particularly sensitive to changes in salinity which can be expected as a consequence of altered precipitation patterns. Marine-tolerant species...... the Baltic because of its low salinity. Fishing fleets which presently target marine species (e.g. cod, herring, sprat, plaice, sole) in the Baltic will likely have to relocate to more marine areas or switch to other species which tolerate decreasing salinities. Fishery management thresholds that trigger...

  8. Competition for the fish - fish extraction from the Baltic Sea by humans, aquatic mammals and birds

    DEFF Research Database (Denmark)

    Hansson, Sture; Bergström, Ulf; Bonsdorff, E.

    2017-01-01

    by competition from the fishery. In the central and southern Baltic, seals and birds consume about as much flatfish as is caught by the fishery and competition is possible. Birds and seals consume 2-3 times as much coastal fish as is caught in the fishery. Many of the coastal species are not much targeted......Populations of fish eating mammals (primarily seals) and birds have increased in the Baltic Sea and there is concern that their consumption reduces fish stocks and has negative impact on the fishery. Based primarily on published data on fisheries’ landings and abundances, consumption and diets...

  9. The Two-sector Economic Problem Of Persistent Organic Pollution and Baltic Sea Salmon Fisheries

    DEFF Research Database (Denmark)

    Hutniczak, Barbara; Kronbak, Lone Grønbæk

    2011-01-01

    sector. The paper sets up a general social planner model and demonstrates it in simple functional form, using the problem of persistent organic pollution in the Baltic Sea and its effects on the regulation and economic value of the Baltic Salmon. The paper illustrates how a modified golden rule can......The paper describes the general nature of two-sector environmental and natural resource problems and highlights the issue of two sector models where one sector imposes a one-sided negative externality on the other sector, e.g. the polluting sector causes changes in the economic value of the fishery...

  10. Modelling the mixing of herring stocks between the Baltic and the North Sea from otolith data

    DEFF Research Database (Denmark)

    Ulrich, Clara; Post, Søren Lorentzen; Worsøe Clausen, Lotte

    2012-01-01

    Herring catches in the western Baltic, Kattegat and Skagerrak consist of a mixture of stocks, mainly North Sea autumn spawners (NSAS) and western Baltic spring spawners (WBSS), which is managed through a single TAC. Catches of these two stocks are split using otolith microstructures from Danish...... as provide solutions to the complex management of this mix. The stock‐specific seasonal trends in distribution of the two main stocks from otolith data were analysed using a generalized linear mixed model (GLMM) of stock composition. The results show a clear seasonal and age‐related pattern...

  11. Construction of transport and energy networks in the Baltic region as an impetus for regional development

    Directory of Open Access Journals (Sweden)

    Kuznetsov Alexey

    2013-11-01

    Full Text Available In light of some new aspects of the EU functioning, particularly, the recovery from the 2008-2009 global crisis, transportation and energy development projects are coming to the forefront in the Baltic region. At the same time, there is a need to consider EU’s recent adoption of a common seven-year financial program (2014—2020, which serves, in effect, as the Union’s budget. Given that, one may conclude that the countries of the Baltic region are entering a new stage of development. We look at the role and significance of transportation and energy projects as an instrument of economic development. Having studied the largest transport and energy projects in the Baltic region, we were able to show that the new infrastructure networks supported the investment expansion of Swedish and Finnish companies into the post-communist countries of the Baltic Region. Which, in its turn, allowed the Nordic investors to expand their domestic markets. The analysis also shows that the experience of private businesses proves a recent theoretical concept — the pyramid of regional development factors. As a result, the actual regional policy of the EU cannot be considered in the narrow sense of the Cohesion Policy alone.

  12. Construction of transport and energy networks in the Baltic region as an impetus for regional development

    Directory of Open Access Journals (Sweden)

    Kuznetsov Alexey

    2013-01-01

    Full Text Available In light of some new aspects of the EU functioning, particularly, the recovery from the 2008-2009 global crisis, transportation and energy development projects are coming to the forefront in the Baltic region. At the same time, there is a need to consider EU’s recent adoption of a common seven-year financial program (2014—2020, which serves, in effect, as the Union’s budget. Given that, one may conclude that the countries of the Baltic region are entering a new stage of development. We look at the role and significance of transportation and energy projects as an instrument of economic development. Having studied the largest transport and energy projects in the Baltic region, we were able to show that the new infrastructure networks supported the investment expansion of Swedish and Finnish companies into the post-communist countries of the Baltic Region. Which, in its turn, allowed the Nordic investors to expand their domestic markets. The analysis also shows that the experience of private businesses proves a recent theoretical concept — the pyramid of regional development factors. As a result, the actual regional policy of the EU cannot be considered in the narrow sense of the Cohesion Policy alone.

  13. Construction of transport and energy networks in the Baltic region as an impetus for regional development

    Directory of Open Access Journals (Sweden)

    Kuznetsov Alexey

    2013-12-01

    Full Text Available In light of some new aspects of the EU functioning, particularly, the recovery from the 2008-2009 global crisis, transportation and energy development projects are coming to the forefront in the Baltic region. At the same time, there is a need to consider EU’s recent adoption of a common seven-year financial program (2014—2020, which serves, in effect, as the Union’s budget. Given that, one may conclude that the countries of the Baltic region are entering a new stage of development. We look at the role and significance of transportation and energy projects as an instrument of economic development. Having studied the largest transport and energy projects in the Baltic region, we were able to show that the new infrastructure networks supported the investment expansion of Swedish and Finnish companies into the post-communist countries of the Baltic Region. Which, in its turn, allowed the Nordic investors to expand their domestic markets. The analysis also shows that the experience of private businesses proves a recent theoretical concept — the pyramid of regional development factors. As a result, the actual regional policy of the EU cannot be considered in the narrow sense of the Cohesion Policy alone.

  14. New Data on Ordovician Eocrinoids and Paracrinoids of the Baltic Region

    Science.gov (United States)

    Rozhnov, S.

    2009-04-01

    morphology to glyptocystitid rhombiferans, which has been found in the Baltic Basin, represents the third branch of Ordovician eocrinoids. The reconstruction of Bolboporites, which is based on unique specimens with articulated proximal segments of brachiols, shows with confidence that it belongs to eocrinoids. The Volkhov Regional Stage has yielded two endemic eocrinoid genera, which show certain similarity to crinoids. One of them, Gadovocrinus, has a small massive calyx without a column and facet for attachment of arms of different sizes. This is probably an unknown aberrant form of pelmatozoan echinoderm. The second genus, Simankovocrinus, is reconstructed based on isolated plates. The structure of its facets for the arms and the position of the gonopore below the lateral anus suggest that it probably belongs to eocrinoids, despite the extraordinary morphology and similarity to crinoids. In Uhaku of northern Estonia, plates of Acolocrinus were recorded. This genus is usually assigned to crinoids. However it may belong to eocrinoids that became similar to crinoids as a result of convergent development. These eleven genera mostly occurred in the Middle Ordovician and completely disappeared by the end of the Kukruze, when the climate approached tropical conditions. Later deposits have yielded only one eocrinoid genus, which occur in the bioherm beds of the Keila Regional Stage near Vasalemma (northern Estonia). It has a flat theca of many plates, with an apertural part resembling that of Mandalocystis. New material of Baltic paracrinoids enables a detailed reconstruction of the morphology of two previously known endemic genera, Achradocystites (Keila -Oandu) and Heckerites (Keila). Thus, new data on Baltic eocrinoids show that they were widespread in the Middle Ordovician. The most diverse cryptocrinid-rhipidocystid branch developed in parallel with the North American branch of similar genera. Rhopalocystidae indicate biogeographical link with the seas of northern Gondwana

  15. The Amber Industry: Development Сhallenges and Combating Amber Trafficking in the Baltic Region

    Directory of Open Access Journals (Sweden)

    Volchetskaya Т. S.

    2017-12-01

    Full Text Available This article considers the current state and prospective development of the amber industry in the Baltic Sea region. The authors identify the main obstacles to the industry’s development in Russia — poor pricing mechanisms for raw amber, an imbalance between supply and demand, a slow pace of technological modernisation, and a delayed introduction of new technologies and processing techniques. The authors identify gaps in the regulatory framework and highlight problems of legal regulation and law enforcement as regards the amber industry. Combating illegal amber extraction and trafficking is a pressing problem in the Kaliningrad region (Russia and other Baltic region states. The article explores theoretical aspects of the legislative policy on combating illegal amber extraction and trafficking. The authors focus on the relevant law enforcement practices and hold that administrative sanctions for unauthorised amber extraction and trade are not fully effective in Russia. The authors stress the need for introducing criminal liability for a repeated offence and outline opportunities for using forensic gemological examination of amber and amber products.

  16. Climate change can cause complex responses in Baltic Sea macroalgae: A systematic review

    Science.gov (United States)

    Takolander, Antti; Cabeza, Mar; Leskinen, Elina

    2017-05-01

    Estuarine macroalgae are important primary producers in aquatic ecosystems, and often foundation species providing structurally complex habitat. Climate change alters many abiotic factors that affect their long-term persistence and distribution. Here, we review the existing scientific literature on the tolerance of key macroalgal species in the Baltic Sea, the world's largest brackish water body. Elevated temperature is expected to intensify coastal eutrophication, further promoting growth of opportunistic, filamentous species, especially green algae, which are often species associated with intensive filamentous algal blooms. Declining salinities will push the distributions of marine species towards south, which may alter the Baltic Sea community compositions towards a more limnic state. Together with increasing eutrophication trends this may cause losses in marine-originating foundation species such as Fucus, causing severe biodiversity impacts. Experimental results on ocean acidification effects on macroalgae are mixed, with only few studies conducted in the Baltic Sea. We conclude that climate change can alter the structure and functioning of macroalgal ecosystems especially in the northern Baltic coastal areas, and can potentially act synergistically with eutrophication. We briefly discuss potential adaptation measures.

  17. Temperature, Salinity, Oxygen, Phosphate, pH and Alkalinity data collected in the North Atlantic Ocean, Baltic Sea, Barents Sea, Greenland Sea, North Sea, Norwegian Sea and White Sea from R/Vs Artemovsk, Atlantida, Okeanograf, Professor Rudovits, and ice observations, 1957 - 1995 (NODC Accession 0073674)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature, Salinity, Oxygen, Phosphate, pH and Alkalinity data collected in the North Atlantic Ocean, Baltic Sea, Barents Sea, Greenland Sea, North Sea, Norwegian...

  18. Salinity dependence of recruitment success of the sea star Asterias rubens in the brackish western Baltic Sea

    Science.gov (United States)

    Casties, Isabel; Clemmesen, Catriona; Melzner, Frank; Thomsen, Jörn

    2015-06-01

    Salinity strongly influences development and distribution of the sea star Asterias rubens. In Kiel Fjord, located in the western Baltic Sea, A. rubens is the only echinoderm species and one of the main benthic predators controlling blue mussel ( Mytilus edulis) abundance. However, Kiel Fjord with an average salinity of about 15 is located close to the eastern distribution boundary of A. rubens in the Baltic Sea. In this study, we combined field and laboratory investigations to test whether the salinity of Kiel Fjord is high enough to enable successful development of A. rubens. Sea star eggs were fertilized in vitro, and development was monitored in the laboratory at four salinities (9, 12, 15 and 18) for 10 weeks. At a salinity of 9, development ceased prior to the blastula stage. At a salinity of 12, no larvae reached metamorphosis. At higher salinities, larvae developed normally and metamorphosed into juvenile sea stars. Abundances of A. rubens larvae and settled juveniles were also observed in Kiel Fjord and correlated to salinity values measured from March until June during 6 years (2005-2010). Results revealed high A. rubens settlement rates only in 2009, the year when salinity was the highest and least variable during the period of spawning and larval development. It appears that only years with high and stable salinities permit recruitment of A. rubens in Kiel Fjord. Projected desalination of the Baltic Sea could shift the distribution of A. rubens in the western Baltic Sea north-westwards and may lead to local extinction of a keystone species of the benthic ecosystem.

  19. Distribution and reproduction of the Arctic ctenophore Mertensia ovum in the Baltic Sea

    DEFF Research Database (Denmark)

    Lehtiniemi, M; Gorokhova, E; Bolte, S

    2013-01-01

    , with highest abundances found in sea areas and water layers at temperatures 5.5 and oxygen levels >4 ml l-1. During summer, the highest abundances of ctenophores and their eggs were found near the halocline, while the distribution was more uniform throughout the water column during winter. Only ctenophores >3......Species identification based on morphological characteristics has caused misidentifications and led to twisted views of abundances and roles of ctenophores. Based on extensive field studies from 2007 to 2010, the occurrence of the arctic ctenophore Mertensia ovum was genetically verified...... in the southern, central and northern Baltic Sea, and its egg production, distribution and abundance were studied in relation to physical factors. Genetic analyses indicate that M. ovum is by far the most abundant small ctenophore in the Baltic Sea. Specimens from a 20 yr old ctenophore collection were also...

  20. Oil Pollution in the Southeastern Baltic Sea in 2009-2011

    Directory of Open Access Journals (Sweden)

    Lavrova O. Yu.

    2014-12-01

    Full Text Available From January 2009 to April 2012 a satellite survey of the central and southeastern parts of the Baltic Sea was carried out by the Space Radar Laboratory at the Space Research Institute of Russian Academy of Sciences (RAS. The main attention was focused on the detection of oil pollution as well as biogenic and anthropogenic surfactant films. The basic data are high resolution radar images obtained by advanced synthetic aperture radar (ASAR on board of the Envisat satellite of the European Space Agency. Remotely sensed data in visual and infrared (IR bands acquired by sensors MERIS Envisat, MODIS-Terra and -Aqua, and AVHRR NOAA nearly simultaneously with the ASAR images, were processed and analysed in order to facilitate the discrimination between different types of surface pollutants, to understand a comprehensive features of meteorological and hydrodynamic processes in the sea area of investigation, and to reveal factors determining pollutants spread and drift. The regions of the most intense oil pollution are outlined.

  1. Deepwater dynamics and mixing processes during a major inflow event in the central Baltic Sea

    Science.gov (United States)

    Holtermann, Peter L.; Prien, Ralf; Naumann, Michael; Mohrholz, Volker; Umlauf, Lars

    2017-08-01

    Intrusions of large amounts of dense and oxygen-rich waters during so-called Major Baltic Inflows (MBIs) form an essential component of the Baltic Sea overturning circulation and deepwater ventilation. Despite their importance, however, detailed observations of the processes occurring in the central basins during an MBI are virtually lacking. Here data from a long-term deployment of an autonomous profiling platform located in the center of one of the main basins are presented, providing the first direct and detailed view of the deepwater modifications and dynamics induced by one of the largest MBIs ever recorded (MBI 2014/2015). Approximately, 21 Gmol of oxygen were imported during three distinct inflow phases with an unexpectedly large contribution of oxic intrusions at intermediate depth. Oxygen consumption rates during the stagnation period immediately following the inflow phase was found to be 87 g m-2 yr-1 with a dominant contribution of sedimentary oxygen demand. The most energetic deepwater processes (topographic and near-inertial waves) were only marginally affected by the inflow; however, subinertial energy levels associated with intrusions and eddies were strongly enhanced. Turbulence microstructure data revealed that the deep interior regions remain essentially nonturbulent even during the energetic conditions of an MBI, emphasizing the importance of boundary mixing. Warm intrusions frequently showed a temperature fine structure with vertical scales of the order of 0.1 m, without any signs of active turbulence. At the upper flanks of these intrusions, double-diffusive staircases were often found to develop, suggesting an important alternative mixing process during inflow conditions.

  2. Characterizing and predicting the distribution of Baltic Sea flounder (Platichthys flesus) during the spawning season

    DEFF Research Database (Denmark)

    Orio, Alessandro; Bergström, Ulf; Casini, Michele

    2017-01-01

    Identification of essential fish habitats (EFH), such as spawning habitats, is important for nature conservation, sustainable fisheries management and marine spatial planning. Two sympatric flounder (Platichthys flesus) ecotypes are present in the Baltic Sea, pelagic and demersal spawning flounde...

  3. Uncertainty estimation for operational ocean forecast products—a multi-model ensemble for the North Sea and the Baltic Sea

    Science.gov (United States)

    Golbeck, Inga; Li, Xin; Janssen, Frank; Brüning, Thorger; Nielsen, Jacob W.; Huess, Vibeke; Söderkvist, Johan; Büchmann, Bjarne; Siiriä, Simo-Matti; Vähä-Piikkiö, Olga; Hackett, Bruce; Kristensen, Nils M.; Engedahl, Harald; Blockley, Ed; Sellar, Alistair; Lagemaa, Priidik; Ozer, Jose; Legrand, Sebastien; Ljungemyr, Patrik; Axell, Lars

    2015-12-01

    Multi-model ensembles for sea surface temperature (SST), sea surface salinity (SSS), sea surface currents (SSC), and water transports have been developed for the North Sea and the Baltic Sea using outputs from several operational ocean forecasting models provided by different institutes. The individual models differ in model code, resolution, boundary conditions, atmospheric forcing, and data assimilation. The ensembles are produced on a daily basis. Daily statistics are calculated for each parameter giving information about the spread of the forecasts with standard deviation, ensemble mean and median, and coefficient of variation. High forecast uncertainty, i.e., for SSS and SSC, was found in the Skagerrak, Kattegat (Transition Area between North Sea and Baltic Sea), and the Norwegian Channel. Based on the data collected, longer-term statistical analyses have been done, such as a comparison with satellite data for SST and evaluation of the deviation between forecasts in temporal and spatial scale. Regions of high forecast uncertainty for SSS and SSC have been detected in the Transition Area and the Norwegian Channel where a large spread between the models might evolve due to differences in simulating the frontal structures and their movements. A distinct seasonal pattern could be distinguished for SST with high uncertainty between the forecasts during summer. Forecasts with relatively high deviation from the multi-model ensemble (MME) products or the other individual forecasts were detected for each region and each parameter. The comparison with satellite data showed that the error of the MME products is lowest compared to those of the ensemble members.

  4. Bacterial Activity and Organic Matter Turnover in Oxygen Deficient Waters of the Baltic Sea

    Science.gov (United States)

    Piontek, J.; Massmig, M.; Endres, S.; Le Moigne, F. A. C.; Bange, H. W.; Engel, A.

    2016-02-01

    The Baltic Sea is an enclosed marine system that suffers from expanding zones of oxygen deficiency due to limited ventilation by the episodic inflow of oxygenated North Sea water combined with high anthropogenic nutrient loads. In particular coastal areas are strongly influenced by eutrophication that leads to enhanced microbial oxygen consumption and sporadic anoxia even at shallow sites. It has been shown that oxygen availability is a powerful determinant of the taxonomic composition of prokaryotic communities in deep waters of the Baltic Sea. However, it remains unclear if community changes in response to low oxygen impact carbon remineralization or if functional redundancy prevents effects on major biogeochemical processes driven by bacterial activity. Our study includes monthly samplings at a coastal time series station over three annual cycles with recurring anoxic periods in late summer. Furthermore, sampling was accomplished in the deep Gotland Basin, where a permanent pycnocline prevents vertical mixing. We determined rates of extracellular glucosidase, aminopeptidase and phosphatase, as well as bacterial protein production using fluorescent and radioactive labelled substrate analogues, respectively. The rate measurements were combined with the analysis of organic matter concentration and composition by different analytical tools. Field data and experimental work show that enzymatic polymer hydrolysis, bacterial biomass production and growth rates in oxygen deficient waters of the Baltic Sea are not inherently lower than in oxic waters. Instead, results reveal that the reactivity of organic carbon and the availability of inorganic nutrients are more powerful constraints on organic matter turnover in oxygen deficient zones of the Baltic Sea. Our results imply that oxygen availability alone is not the decisive factor for heterotrophic bacterial activity in deep waters, instead it is part of a multiple environmental control of carbon remineralization.

  5. Finnish studies on radioactivity in the Baltic sea after the Chernobyl accident in 1986

    International Nuclear Information System (INIS)

    Ilus, E.; Sjoeblom, K.L.; Saxen, R.; Aaltonen, H.; Taipale, T.K.

    1987-04-01

    After the Chernobyl accident extensive studies were started in the Baltic Sea area. Samples of sea water, bottom sediment, fish, plnkton, littoral algae and benthic animals were collected for radionuclide analyses. All the samples were analysed gammaspectrometrically. From some of the samples ''8''9Sr, ''9''0Sr and transuranic elements were determined. The fallout from the Chernobyl accident was areally unevenly distributed, contrary to the fallout situation in the 1960s. This also reflects in the results of the measurements in the marine environment. After the decay of short-lived radionuclides, ''1''3''7Cs and ''1''3''4Cs were the most important nuclides. The ''1''3''7Cs concentrations in sea water were considerably higher in 1986 than the values reported from the 1960s. Due to the low accumulation of caesium isotopes in brackish-water fish, the concentrations in Baltic Sea fish were clearly lower than in freshwater fish. Thus the consumption of Baltic fish contributes only insignificantly to internal radiation doses of Finnish people

  6. BASIC: Baltic Sea cyanobacteria. An investigation of the structure and dynamics of water blooms of cyanobacteria in the Baltic Sea––responses to a changing environment

    NARCIS (Netherlands)

    Stal, L.J.; Albertano, P.; Bergman, B.; Von Bröckel, K.; Gallon, J.R.; Hayes, P.K.; Sivonen, K.; Walsby, A.E.

    2003-01-01

    The blooms of cyanobacteria that develop each summer in the Baltic Sea are composed of two functional groups, namely the small-sized picocyanobacteria (Synechococcus sp.) and the larger, colony-forming, filamentous N2-fixing cyanobacteria. The former encompassed both red (phycoerythrin-rich) and

  7. The baltic environmental information dissemination system: using environmental informatics as a tool for sustainable development in the Baltic Sea region O sistema báltico de disseminação de informação ambiental: o uso de informática ambiental como uma ferramenta para o desenvolvimento sustentável na região do Mar Báltico

    Directory of Open Access Journals (Sweden)

    Walter Leal Filho

    2002-09-01

    Full Text Available The on-going economic development of EU-countries as well of the countries in the C&E European region has been leading to a significant use of a great deal of natural resources as well as to noticeable environmental problems. The lack of a wide-spread environmental awareness from the side of those acting in various sectors (industry, public administration, users sometimes inhibit the implementation of legislation already available as well as the introduction of new technologies deriving, from example, from marine research. An example of this state of affairs is seen in respect of the implementation of the recommendations deriving from Baltic 21 and VASAB 2010, which illustrate the advantages from a cross-sectorial, open mechanism for the dissemination of environmental information in the region. There are various organisations today which act as suppliers of environmental information in the Baltic Sea Region. However, few, if any, are providers concerned with the various ways in which information on matters related to sustainable development is being used by various groups and audiences. This state of affairs makes it necessary to enhance the current mechanisms and approaches in place, so as to enable the wide-range of environmental information available today from areas such as marine research, to be more widely used. It is equally important that the didactic or educational potential of such information be exploited, so as to not only inform, but also to educate various groups and the general public on matters concerned with the environment in European closed seas and give information to planners and politicians to prepare decisions. In order to address such needs, the project "Baltic Environmental Information Dissemination System (BEIDS" was set in motion. BEIDS has been taking advantage of the most modern information technologies and has been acting as a focal point for the circulation of intelligent information on aspects of the marine

  8. Twenty five years of invasion: management of the round goby Neogobius melanostomus in the Baltic Sea

    DEFF Research Database (Denmark)

    Ojaveer, Henn; Galil, Bella S.; Lehtiniemi, Maiju

    2015-01-01

    to be considered for post-invasion management. Priority should be given to the establishment of a coordinated pan-Baltic monitoring programme and associated data storage and exchange, as well as the compilation of landing statistics of the round goby in commercial and recreational fisheries. While eradication......, and hull fouling of inland and sea-going vessels, including recreational boats. Extensive involvement of stakeholders is crucial at all phases of the management process.......The round goby, Neogobius melanostomus (Pallas, 1814), is one of the most invasive non-indigenous species in the Baltic Sea. It dominates coastal fisheries in some localities and is frequently found in offshore pelagic catches. This paper identifies management issues and suggests actions...

  9. Intercomparison of radionuclide measurements in Baltic Sea water sample IAEA-299

    International Nuclear Information System (INIS)

    Ballestra, S.; Lopez, J.J.

    1993-03-01

    This report contains the results of the intercomparison exercise on IAEA-299 for the determination of 90 Sr, 134 Cs and 137 Cs concentration in Baltic Sea Water. The participants belong to 8 laboratories located in 6 countries, members of the Helsinki commission. Statistical evaluation of the data reported yields to recommended values for these elements. The elements, their recommended values and confidence intervals are listed here: 90 Sr: 13.6 Bq kg -1 (12.8-14.4); 134 Cs: 6.7 Bq kg -1 (5-8.3); 137 Cs: 70.9 Bq kg -1 (68-72.3). Reference date: 27 June 1991 (sampling date). The data reported by the laboratories of the Baltic Sea States are generally in very good agreement. (author)

  10. Projected change in atmospheric nitrogen deposition to the Baltic Sea towards 2020

    DEFF Research Database (Denmark)

    Hertel, Ole; Geels, Camilla; Hansen, K.M.

    2011-01-01

    this is projected to decrease to 48 %. For some countries the projected decrease in N deposition arising from the implementation of the NEC-II directive will be a considerable part of the reductions agreed on in the provisional reduction targets of the Baltic Sea Action Plan. This underlines the importance......The ecological status of the Baltic Sea has for many years been affected by the high input of both waterborne and airborne nutrients. The focus is here on the airborne input of nitrogen (N) and the projected changes in this input, assuming the new National Emission Ceilings directive (NEC...... scenario, giving a projected reduction of 38 k tonnes N in the annual load in 2020. This equals a decline in N deposition of 19 %. The results from 20 model runs using the tagging method show that of the total N deposition in 2007, 52 % came from emissions within the bordering countries. By 2020...

  11. Geochemical records of salt-water inflows into the deep basins of the Baltic Sea

    DEFF Research Database (Denmark)

    Neumann, T.; Christiansen, C.; Clasen, S.

    1997-01-01

    +) accumulating in the deep, anoxic water body. Inflow of oxygenated water causes oxidation of Mn2+ to Mn4+ and precipitation of MnO2, which accumulates in Mn-rich layers at the sediment surface. When the bottom water becomes anoxic again, MnO2 degradation release Mn2+ into the pore water, and alkalinity......The estuarine circulation system of the Baltic Sea promotes stable stratification and bottom water anoxia in sedimentary basins of the Baltic proper. Ingressions of saline, oxygen-rich waters from the North Sea replace the oxygen depleted deep water. Timing and extent of the ingressions vary...... on time-scales of years to decades, and are largely determined by wind-strength and storm frequency over the North Atlantic Ocean and Europe. Mn/Fe-ratios in sediments from a dated sediment core of the Gotland Deep (250 m water depth) record variations in redox conditions that can be linked to historical...

  12. Trophic Interactions in the Baltic Sea: Predation on cod eggs by clupeids

    DEFF Research Database (Denmark)

    Neumann, Viola

    sprat and herring in terms of major taxonomic groups was generally similar in the 1990s and 2000s. Although higher proportions of cod eggs occurred in the diet in the 2000s, the overall quantities of cod eggs in the diet were generally lower in the 2000s compared to the 1990s (Paper I). This suggests......Cod (Gadus morhua), sprat (Sprattus sprattus) and herring (Clupea harengus) are key species of the upper trophic levels in the Baltic Sea ecosystem and are strongly interlinked: The piscivore cod is the main predator on the planktivores sprat and herring, which feed, amongst others, on cod eggs....... Egg predation by sprat and herring has earlier been suggested as one of the factors limiting cod recruitment success in the Baltic Sea in the 1990s. Since then, changes have taken place in cod recruitment as well as in the ecological factors potentially influencing egg predation. The overall aim...

  13. Biomass and number of fish impinged at a nuclear power plant by the Baltic Sea

    OpenAIRE

    Bryhn, Andreas; Bergenius, Mikaela; Dimberg, Peter H; Adill, Anders

    2013-01-01

    The main aim of this study was to investigate the number and biomass of impinged fish at Forsmark Nuclear Power Plant in Sweden, located on the coast of the Baltic Sea. Of particular interest was the number of impinged individuals of the critically endangered European eel (Anguilla anguilla) which is regularly caught in the cooling system. Another aim was to determine the comparability of the results from Forsmark and results from impingement studies in other types of waters. Cross-systems st...

  14. Internal structure and geochemical properties of spheroidal ferromanganese concretions of the Baltic Sea

    OpenAIRE

    Wasiljeff, Joonas

    2015-01-01

    Ferromanganese concretions or nodules are recent biogeochemical sedimentary formations present in abundant amounts at the fringes of deep basins in the area of the Baltic Sea. The concretions have a distinctive concentric structure, consisting of alternating iron and manganese-rich layers. The iron layers typically host phosphorus, and the concretions also work as traps for many other compounds such as heavy metals and REEs. In general, their dissolution occurs in anoxic conditions whereas pr...

  15. Polonium-210 in mussels and fish from the Baltic-North Sea estuary

    DEFF Research Database (Denmark)

    Dahlgaard, H.

    1996-01-01

    Polonium-210 has been measured in Danish fish meat caught in the North Sea, the Kattegat and the Baltic in 1991-1994. Average values of 0.35, 0.65 and 0.96 Bq Po-210 kg(-1) fresh weight were observed for cod, herring and plaice fillets, respectively. The difference between species is statisticall...... in fish and mussels may represent a natural baseline. Copyright (C) 1996 Elsevier Science Ltd....

  16. Low-frequency variability in North Sea and Baltic Sea identified through simulations with the 3-D coupled physical–biogeochemical model ECOSMO

    Directory of Open Access Journals (Sweden)

    U. Daewel

    2017-09-01

    Full Text Available Here we present results from a long-term model simulation of the 3-D coupled ecosystem model ECOSMO II for a North Sea and Baltic Sea set-up. The model allows both multi-decadal hindcast simulation of the marine system and specific process studies under controlled environmental conditions. Model results have been analysed with respect to long-term multi-decadal variability in both physical and biological parameters with the help of empirical orthogonal function (EOF analysis. The analysis of a 61-year (1948–2008 hindcast reveals a quasi-decadal variation in salinity, temperature and current fields in the North Sea in addition to singular events of major changes during restricted time frames. These changes in hydrodynamic variables were found to be associated with changes in ecosystem productivity that are temporally aligned with the timing of reported regime shifts in the areas. Our results clearly indicate that for analysing ecosystem productivity, spatially explicit methods are indispensable. Especially in the North Sea, a correlation analysis between atmospheric forcing and primary production (PP reveals significant correlations between PP and the North Atlantic Oscillation (NAO and wind forcing for the central part of the region, while the Atlantic Multi-decadal Oscillation (AMO and air temperature are correlated to long-term changes in PP in the southern North Sea frontal areas. Since correlations cannot serve to identify causal relationship, we performed scenario model runs perturbing the temporal variability in forcing condition to emphasize specifically the role of solar radiation, wind and eutrophication. The results revealed that, although all parameters are relevant for the magnitude of PP in the North Sea and Baltic Sea, the dominant impact on long-term variability and major shifts in ecosystem productivity was introduced by modulations of the wind fields.

  17. Literature review on future development of the Baltic Sea and recommendations for safety modeling

    International Nuclear Information System (INIS)

    Lahdenperae, A.-M.

    2006-12-01

    The report represents the summary of the main factors, which affects the future development and state of the Baltic Sea. The emphasis is on land uplift, shoreline displacement, and physical, chemical and biological characteristics of the sea. In addition, historical evolution of the Baltic Sea after the last ice age and potential impacts of the different climate scenarios are presented. The Baltic Sea has an important influence on the development of the geospherebiosphere interface zone at Olkiluoto. Thus, it is important to take account all these factors in the Safety Modelling of the nuclear waste repository. Different models have been used to evaluate land uplift at Olkiluoto and changes in the sea and land area, especially in the interface zone. The main parameters have been monitored satisfactory way at the Olkiluoto offshore. Based on the present sea sediment stratigraphy, overburden, topography and vegetation it has been fairly well estimated coming future land and sea areas of the Olkiluoto Island and its surroundings. According to the results, Olkiluoto will be part of the continent during the next decade. In the shallow shores of Olkiluoto, the amounts of common reed are increasing naturally, resulting in paludification. The spatial and temporal changes at Olkiluoto can be estimated and modelled more detailed by using the well focused research sites and more accurate results. In addition, more information is needed on development of the watershed areas, lakes, rivers and vegetation and on sedimentation and erosion processes, hydrology, quality and quantity of seabed sediments and stratigraphy, element budgets and recharge and discharge areas, especially at the geosphere-biosphere interface zones. (orig.)

  18. Sensitivity of the overturning circulation of the Baltic Sea to climate change, a numerical experiment

    Science.gov (United States)

    Hordoir, Robinson; Höglund, Anders; Pemberton, Per; Schimanke, Semjon

    2018-02-01

    An ocean model covering the Baltic Sea area is forced by several climate scenarios for a period extending from 1961 to 2100. The Baltic Sea overturning circulation is then analyzed. The analysis shows that this circulation decreases between the end of the 20th century and the end of the 21st century, and that the decrease is amplified in the case of the strongest greenhouse gas emission scenarios, which corresponds with the highest warming cases. The reasons behind this decrease in overturning circulation are investigated. A strong increase of thermal stratification is noticed at the level of the Baltic Sea mixed layer. Based on buoyancy flux considerations, we demonstrate that the decrease in overturning circulation coincides with the increase of thermal stratification. Evidence shows that the underlying process is linked to a smaller erosion of the halocline due to a higher shielding, itself linked with a stronger and longer seasonal thermocline. This theory works if surface wind mixing is not taken into account directly in the computation of buoyancy fluxes.

  19. Mechanisms Causing Hypoxia in the Baltic Sea at Different Spatial and Temporal Scales

    Science.gov (United States)

    Conley, D. J.; Carstensen, J.; Gustafsson, B.; Slomp, C. P.

    2016-02-01

    A number of synthesis efforts have documented the world-wide increase in hypoxia, which is primarily driven by nutrient inputs with consequent organic matter enrichment. Physical factors including freshwater or saltwater inputs, stratification and temperature also play an important role in causing and sustaining hypoxia. The Baltic Sea provides an interesting case study to examine changes in oxygen dynamics over time because of the diversity of the types of hypoxia that occur, which ranges from episodic to seasonal hypoxia to perennial hypoxia. Hypoxia varies spatially across the basin with differences between open water bottoms and coastal systems. In addition, the extent and intensity of hypoxia has also varied greatly over the history of the basin, e.g. the last 8000 years. We will examine the mechanisms causing hypoxia at different spatial and temporal scales. The hydrodynamical setting is an important governing factor controlling possible time scales of hypoxia, but enhanced nutrient fluxes and global warming amplify oxygen depletion when oxygen supply by physical processes cannot meet oxygen demands from respiration. Our results indicate that climate change is counteracting management efforts to reduce hypoxia. We will address how hypoxia in the Baltic Sea is terminated at different scales. More importantly, we will explore the prospects of getting rid of hypoxia with the nutrient reductions that have been agreed upon by the countries in the Baltic Sea basin and discuss the time scales of improvement in bottom water oxygen conditions.

  20. The ecophysiology of Sprattus sprattus in the Baltic and North Seas

    DEFF Research Database (Denmark)

    Peck, Myron A.; Baumann, Hannes; Bernreuther, Matthias

    2012-01-01

    The European sprat (Sprattus sprattus) was a main target species of the German GLOBEC program that investigated the trophodynamic structure and function of the Baltic and North Seas under the influence of physical forcing. This review summarizes literature on the ecophysiology of sprat with an em......The European sprat (Sprattus sprattus) was a main target species of the German GLOBEC program that investigated the trophodynamic structure and function of the Baltic and North Seas under the influence of physical forcing. This review summarizes literature on the ecophysiology of sprat...... with an emphasis on describing how environmental factors influence the life-history strategy of this small pelagic fish. Ontogenetic changes in feeding and growth, and the impacts of abiotic and biotic factors on vital rates are discussed with particular emphasis on the role of temperature as a constraint to life-history...... scheduling of this species in the Baltic Sea. A combination of field and laboratory data suggests that optimal thermal windows for growth and survival change during early life and are wider for eggs (5–17°C) than in young (8- to 12-mm) early feeding larvae (5–12°C). As larvae become able to successfully...

  1. Occurrence of Plasmids in the Aromatic Degrading Bacterioplankton of the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Ain Heinaru

    2011-11-01

    Full Text Available Plasmids are mobile genetic elements that provide their hosts with many beneficial traits including in some cases the ability to degrade different aromatic compounds. To fulfill the knowledge gap regarding catabolic plasmids of the Baltic Sea water, a total of 209 biodegrading bacterial strains were isolated and screened for the presence of these mobile genetic elements. We found that both large and small plasmids are common in the cultivable Baltic Sea bacterioplankton and are particularly prevalent among bacterial genera Pseudomonas and Acinetobacter. Out of 61 plasmid-containing strains (29% of all isolates, 34 strains were found to carry large plasmids, which could be associated with the biodegradative capabilities of the host bacterial strains. Focusing on the diversity of IncP-9 plasmids, self-transmissible m-toluate (TOL and salicylate (SAL plasmids were detected. Sequencing the repA gene of IncP-9 carrying isolates revealed a high diversity within IncP-9 plasmid family, as well as extended the assumed bacterial host species range of the IncP-9 representatives. This study is the first insight into the genetic pool of the IncP-9 catabolic plasmids in the Baltic Sea bacterioplankton.

  2. Methods comparison, transport and distribution of polar herbicides in the Baltic Sea.

    Science.gov (United States)

    Skeff, Wael; Orlikowska, Anna; Schulz-Bull, Detlef E

    2017-01-30

    Two LC-MS/MS methods including different sample preparation and quantitative processes showed a good agreement for analysis of the herbicides MCPA, mecoprop, isoproturon, bentazon and chloridazon, and the metabolite chloridazon-methyl-desphenyl (CMD) in estuarine waters. Due to different sensitivity of the methods only one could be used to analyze marine samples. The transport of these compounds to the Baltic Sea via ten German estuaries and their distribution between coastal water and sediments was studied. The results showed that all selected compounds can be transported to the Baltic Sea (0.9-747ng/L). Chloridazon, bentazon, isoproturon and CMD were detected (0.9-8.9ng/L) in the coastal waters and chloridazon and isorproturon in the sediments (5-136pg/g d.w.). Levels of contaminants in the sediments could be influenced by the total organic carbon content. Concentrations observed in the Baltic Sea are most likely not high enough to cause acute effects, but long term effect studies are strongly recommended. Copyright © 2016 Elsevier Ltd. All rights reserved.

  3. Habitat modelling limitations - Puck Bay, Baltic Sea - a case study

    Directory of Open Access Journals (Sweden)

    Jan Marcin Węsławski

    2013-02-01

    Full Text Available The Natura 2000 sites and the Coastal Landscape Park in a shallow marine bay in the southern Baltic have been studied in detail for the distribution of benthic macroorganisms, species assemblages and seabed habitats. The relatively small Inner Puck Bay (104.8 km2 is one of the most thoroughly investigated marine areas in the Baltic: research has been carried out there continuously for over 50 years. Six physical parameters regarded as critically important for the marine benthos (depth, minimal temperature, maximum salinity, light, wave intensity and sediment type were summarized on a GIS map showing unified patches of seabed and the near-bottom water conditions. The occurrence of uniform seabed forms is weakly correlated with the distributions of individual species or multi-species assemblages. This is partly explained by the characteristics of the local macrofauna, which is dominated by highly tolerant, eurytopic species with opportunistic strategies. The history and timing of the assemblage formation also explains this weak correlation. The distribution of assemblages formed by long-living, structural species (Zostera marina and other higher plants shows the history of recovery following earlier disturbances. In the study area, these communities are still in the stage of recovery and recolonization, and their present distribution does not as yet match the distribution of the physical environmental conditions favourable to them. Our results show up the limitations of distribution modelling in coastal waters, where the history of anthropogenic disturbances can distort the picture of the present-day environmental control of biota distributions.

  4. Millennial changes of the Baltic Sea salinity. Studies of the sensitivity of the salinity to climate change

    Energy Technology Data Exchange (ETDEWEB)

    Gustafsson, Bo G. [Oceanus Havsundersoekningar, Goeteborg (Sweden)

    2004-05-01

    An important question for safety assessments of nuclear waste repositories is the salinity of the Baltic Sea under different conditions. The salinity affects the potential recipient ecosystems, the water turnover along the coast and the hydrology as well as the groundwater chemistry. In this report a model that enables computation of the Baltic Sea salinity for different sea level positions and freshwater supplies is presented. The model is used to compute the salinities in Baltic proper, Bothnian Sea and Bothnian Bay for all combinations of global sea level changes from -10 m to 10 m and freshwater supplies from 0 to 60,000 m{sup 3}/s. The results are presented in a series of graphs that enables the reader to make an assessment of the impact of a given climatic change. The model is also used to compute the decrease of the salinity in Bothnian Sea and Bothnian Bay during the next few millennia due to the postglacial uplift. The results show that modest changes in global sea level, say {+-}1 m, give a salinity change of the order of 1 psu in southern Baltic proper. Changing the freshwater supply with about 2,000 m{sup 3}/s (approximately 10%) gives a similar salinity change. Further, a sea level drop of about 5 m or an increase of the freshwater supply by a factor of 3 is needed to reduce the salinity in southern Baltic proper below 1 psu. In this limit large parts of the Baltic would be limnic. A 50% decrease of the freshwater supply increase the salinity in the southern Baltic proper by a factor of 2 to some 15 psu, but the effect is even more drastic in Bothnian Sea and Bothnian Bay where the salinity increase to 13 and 10 psu, respectively. A less windy climate might have a significant effect in lowering the Baltic salinity due to a combined effect of lowered mixing in Kattegat and lowered exchange between Kattegat and the Baltic. A windier climate will not have such strong effect since increased mixing does not affect the Baltic as much. Most probably the

  5. Millennial changes of the Baltic Sea salinity. Studies of the sensitivity of the salinity to climate change

    International Nuclear Information System (INIS)

    Gustafsson, Bo G.

    2004-05-01

    An important question for safety assessments of nuclear waste repositories is the salinity of the Baltic Sea under different conditions. The salinity affects the potential recipient ecosystems, the water turnover along the coast and the hydrology as well as the groundwater chemistry. In this report a model that enables computation of the Baltic Sea salinity for different sea level positions and freshwater supplies is presented. The model is used to compute the salinities in Baltic proper, Bothnian Sea and Bothnian Bay for all combinations of global sea level changes from -10 m to 10 m and freshwater supplies from 0 to 60,000 m 3 /s. The results are presented in a series of graphs that enables the reader to make an assessment of the impact of a given climatic change. The model is also used to compute the decrease of the salinity in Bothnian Sea and Bothnian Bay during the next few millennia due to the postglacial uplift. The results show that modest changes in global sea level, say ±1 m, give a salinity change of the order of 1 psu in southern Baltic proper. Changing the freshwater supply with about 2,000 m 3 /s (approximately 10%) gives a similar salinity change. Further, a sea level drop of about 5 m or an increase of the freshwater supply by a factor of 3 is needed to reduce the salinity in southern Baltic proper below 1 psu. In this limit large parts of the Baltic would be limnic. A 50% decrease of the freshwater supply increase the salinity in the southern Baltic proper by a factor of 2 to some 15 psu, but the effect is even more drastic in Bothnian Sea and Bothnian Bay where the salinity increase to 13 and 10 psu, respectively. A less windy climate might have a significant effect in lowering the Baltic salinity due to a combined effect of lowered mixing in Kattegat and lowered exchange between Kattegat and the Baltic. A windier climate will not have such strong effect since increased mixing does not affect the Baltic as much. Most probably the shoreline

  6. Statistical analysis of the acceleration of Baltic mean sea-level rise, 1900-2012

    Directory of Open Access Journals (Sweden)

    Birgit Hünicke

    2016-07-01

    Full Text Available We analyse annual mean sea-level records from tide-gauges located in the Baltic and parts of the North Sea with the aim of detecting an acceleration of sea-level rise over the 20textsuperscript{th} and 21textsuperscript{st} centuries. The acceleration is estimated as a (1 fit to a polynomial of order two in time, (2 a long-term linear increase in the rates computed over gliding overlapping decadal time segments, and (3 a long-term increase of the annual increments of sea level.The estimation methods (1 and (2 prove to be more powerful in detecting acceleration when tested with sea-level records produced in global climate model simulations. These methods applied to the Baltic-Sea tide-gauges are, however, not powerful enough to detect a significant acceleration in most of individual records, although most estimated accelerations are positive. This lack of detection of statistically significant acceleration at the individual tide-gauge level can be due to the high-level of local noise and not necessarily to the absence of acceleration.The estimated accelerations tend to be stronger in the north and east of the Baltic Sea. Two hypothesis to explain this spatial pattern have been explored. One is that this pattern reflects the slow-down of the Glacial Isostatic Adjustment. However, a simple estimation of this effect suggests that this slow-down cannot explain the estimated acceleration. The second hypothesis is related to the diminishing sea-ice cover over the 20textsuperscript{th} century. The melting o of less saline and colder sea-ice can lead to changes in sea-level. Also, the melting of sea-ice can reduce the number of missing values in the tide-gauge records in winter, potentially influencing the estimated trends and acceleration of seasonal mean sea-level This hypothesis cannot be ascertained either since the spatial pattern of acceleration computed for winter and summer separately are very similar. The all-station-average-record displays an

  7. Steps towards a SAR-based wind atlas in the Baltic Sea

    DEFF Research Database (Denmark)

    Hasager, Charlotte Bay; Badger, Merete; Pena Diaz, Alfredo

    these years several offshore meteorological masts have been in operation. The first step was to assess the accuracy of SAR-based wind mapping in this region. We compared SAR-based wind maps retrieved from ANSWRS the APL/NOAA SAR Wind Retrieval System. The NOGAPS wind direction data were interpolated in space...... and time prior to input in CMOD-5. Around 900 collocated pairs of observations were found between the SAR-based wind maps and the 10 offshore meteorological masts. The statistical comparison on wind speed (direction) showed root mean square error 1.17 m/s (6.29°), bias of -0.25 m/s (7.75°), standard...... deviation of 1.88 m/s (20.11°), and linear correlation coefficient R2 of 0.783 (0.95°). The second step was estimation of the mean wind speed, the Weibull scale and shape parameters, and energy density based on over 1000 SAR-based wind maps for the Baltic Sea. The results were compared to the FINO-2...

  8. Ecosystem changes in the Neva Estuary (Baltic Sea): natural dynamics or response to anthropogenic impacts?

    Science.gov (United States)

    Golubkov, Sergey; Alimov, Alexander

    2010-01-01

    The Neva Estuary situated in the eastern Gulf of Finland is one of the largest estuaries of the Baltic Sea with a large conurbation, St. Petersburg, situated on its coast. Eutrophication, alien species and large-scale digging and dumping of bottom sediment are the most prominent anthropogenic impacts on its ecosystem. However, many ecosystem responses, which are traditionally attribute to these impacts, are related to natural dynamics of the ecosystem. Fluctuations in discharge of the Neva River, intrusions of bottom hypoxic waters from the western part of the Gulf of Finland, higher summer temperatures and a shorter period of ice cover are climatic mediated factors inducing adverse changes in its ecosystem from the 1980s onwards. The main ecosystem responses to these factors are 2-3-fold increase of trophic status, deterioration of native zoobenthic communities and establishment of alien species, as well as the many fold decrease of fish catch and the population of ringed seal in the region. Copyright 2010 Elsevier Ltd. All rights reserved.

  9. Worldwide Laboratory Comparison on the Determination of Radionuclides in IAEA-446 Baltic Sea Seaweed (Fucus vesiculosus)

    International Nuclear Information System (INIS)

    2013-01-01

    The Radiometrics Laboratory of the IAEA Environment Laboratories in Monaco has been providing quality products and services for the past forty years, including the organization of interlaboratory comparisons, the production of reference and certified reference materials and the provision of training. More than 45 reference materials have been produced, including a wide range of marine sample matrices and radionuclide concentrations. As part of these activities, a new interlaboratory comparison was organized to provide participating laboratories with the opportunity to test the performance of their analytical methods on a seaweed sample with elevated radionuclide levels due to the effects of the Chernobyl accident on the Baltic Sea region. The material used in the analysis of anthropogenic and natural radionuclides in seaweed was the bladder wrack (Fucus vesiculosus). It is expected that the sample, after successful certification, will be issued as a certified reference material for analysing radionuclides in seaweed. The participating laboratories were informed that the IAEA publication would contain a list of the laboratories and the results and descriptions of the interlaboratory comparisons, but that the results would not be attributed to individual laboratories

  10. Implementation of the NEMO model for estimating the spread of leakage from chemical munitions in the Baltic Sea - the first approach

    Science.gov (United States)

    Andrzejewski, Jan

    2017-04-01

    After the Second World War, during the Potsdam Conference a decision about demilitarization of Germany was made, and as a consequence, ammunition including chemical warfare agents (CWA) was dumped into the basins of the Baltic Sea. This type of weapon was stored in metal barrels that were under strong influence of electrochemical oxidation, also known as corrosion. Several tens years later, scientists were wondering what consequences for marine ecosystem could a leakage from this weapon bring. Although over 70 years passed since the Second World War, the influence of potential leakage of the CWA has not been properly estimated. Thus, the main goal of this work is to estimate dangerous area caused by potential leakage using the NEMO (Nucleus for European Modelling of the Ocean) ocean model. The NEMO ocean model is developed by the European Consortium including research institutes from France, England and Italy. The first step of this work is to implement the model for the area of the Baltic Sea. It requires generation of horizontal and vertical grid, bathymetry, atmospheric forces and lateral boundary conditions. Implemented model will have to be checked - it means it will have to pass a validation process. The Baltic Sea is one of the best measured sea in the World - as a consequence a lot of data are freely available for researchers. After validation and tuning up the model, implementation of passive tracer is planned. Passive tracer is the prognostic variable that could represent concentration of potential leakage and does not have influence on the density of the model. Based on distribution of the passive tracer, dangerous areas in the locations of dumpsites will be assessed. The research work was funded by the European Union (European Regional Development Fund) under the Interreg Baltic Sea Region Programme 2014-2020, project #R013 DAIMON (Decision Aid for Marine Munitions).

  11. Effects of air-sea coupling over the North Sea and the Baltic Sea on simulated summer precipitation over Central Europe

    Science.gov (United States)

    Ho-Hagemann, Ha Thi Minh; Gröger, Matthias; Rockel, Burkhardt; Zahn, Matthias; Geyer, Beate; Meier, H. E. Markus

    2017-12-01

    This study introduces a new approach to investigate the potential effects of air-sea coupling on simulated precipitation inland over Central Europe. We present an inter-comparison of two regional climate models (RCMs), namely, the COSMO-CLM (hereafter CCLM) and RCA4 models, which are configured for the EURO-CORDEX domain in the coupled and atmosphere-only modes. Two versions of the CCLM model, namely, 4.8 and 5.0, join the inter-comparison being almost two different models while providing pronouncedly different summer precipitation simulations because of many changes in the dynamics and physics of CCLM in version 5.0. The coupling effect on the prominent summer dry bias over Central Europe is analysed using seasonal (JJA) mean statistics for the 30-year period from 1979 to 2009, with a focus on extreme precipitation under specific weather regimes. The weather regimes are compared between the coupled and uncoupled simulations to better understand the mechanism of the coupling effects. The comparisons of the coupled systems with the atmosphere-only models show that coupling clearly reduces the dry bias over Central Europe for CCLM 4.8, which has a large dry summer bias, but not for CCLM 5.0 and RCA4, which have smaller dry biases. This result implies that if the atmosphere-only model already yields reasonable summer precipitation over Central Europe, not much room for improvement exists that can be caused by the air-sea coupling over the North Sea and the Baltic Sea. However, if the atmosphere-only model shows a pronounced summer dry bias because of a lack of moisture transport from the seas into the region, the considered coupling may create an improved simulation of summer precipitation over Central Europe, such as for CCLM 4.8. For the latter, the benefit of coupling varies over the considered timescales. The precipitation simulations that are generated by the coupled system COSTRICE 4.8 and the atmosphere-only CCLM 4.8 are mostly identical for the summer mean

  12. Reconstruction of the pollution history of alkylphenols (4-tert-octylphenol, 4-nonylphenol) in the Baltic Sea.

    Science.gov (United States)

    Graca, Bożena; Staniszewska, Marta; Zakrzewska, Danuta; Zalewska, Tamara

    2016-06-01

    This paper reports the reconstruction of the pollution history of 4-tert-octylphenol (OP) and 4-nonylphenol (NP) in the Baltic Sea. Alkylphenols are endocrine-disrupting compound and therefore toxic to aquatic organisms. Sediment cores were collected from regions with relatively stable sedimentation conditions. The cores were dated by the (210)Pb method. The OP and NP were determined using HPLC-FL. The highest inventory of these compounds was observed in the Gotland Deep (610 μg m(2) of NP and 47 μg m(2) of OP) and the lowest-on the slope of the Gdansk Deep (24 μg m(2) of NP and 16 μg m(2) of OP). Such spatial distribution was probably, among other factors, the result of the uplift of the sea floor. The pollution trends of OP and NP in sediments coincided with the following: (1) the beginnings of eutrophication (1960s/1970s of the twentieth century) and (2) strong increase in the areal extent and volume of hypoxia and anoxia in the Baltic (present century).

  13. Decadal-Scale Changes of Dinoflagellates and Diatoms in the Anomalous Baltic Sea Spring Bloom

    Science.gov (United States)

    Klais, Riina; Tamminen, Timo; Kremp, Anke; Spilling, Kristian; Olli, Kalle

    2011-01-01

    The algal spring bloom in the Baltic Sea represents an anomaly from the winter-spring bloom patterns worldwide in terms of frequent and recurring dominance of dinoflagellates over diatoms. Analysis of approximately 3500 spring bloom samples from the Baltic Sea monitoring programs revealed (i) that within the major basins the proportion of dinoflagellates varied from 0.1 (Kattegat) to >0.8 (central Baltic Proper), and (ii) substantial shifts (e.g. from 0.2 to 0.6 in the Gulf of Finland) in the dinoflagellate proportion over four decades. During a recent decade (1995–2004) the proportion of dinoflagellates increased relative to diatoms mostly in the northernmost basins (Gulf of Bothnia, from 0.1 to 0.4) and in the Gulf of Finland, (0.4 to 0.6) which are typically ice-covered areas. We hypothesize that in coastal areas a specific sequence of seasonal events, involving wintertime mixing and resuspension of benthic cysts, followed by proliferation in stratified thin layers under melting ice, favors successful seeding and accumulation of dense dinoflagellate populations over diatoms. This head-start of dinoflagellates by the onset of the spring bloom is decisive for successful competition with the faster growing diatoms. Massive cyst formation and spreading of cyst beds fuel the expanding and ever larger dinoflagellate blooms in the relatively shallow coastal waters. Shifts in the dominant spring bloom algal groups can have significant effects on major elemental fluxes and functioning of the Baltic Sea ecosystem, but also in the vast shelves and estuaries at high latitudes, where ice-associated cold-water dinoflagellates successfully compete with diatoms. PMID:21747911

  14. Conception of the Maritime Transport Safety in the Baltic Sea in 2009 to 2015

    Directory of Open Access Journals (Sweden)

    Caban Jacek

    2017-11-01

    Full Text Available The maritime transport is particularly exposed to danger due to the environment of its operations. These are the threat dependent and independent of human e.g. environmental, safety health and life of humans or belongings. In spite of attempts to limit the risk of danger, it is impossible to completely eliminate it. The article presents some aspects of the state of transportation safety in the Baltic Sea from Statistical Yearbook of Maritime Economy and Helcom as well as attempt the undertaken to analyses the security state of this sea area in 2009 to 2015.

  15. The ecophysiology of Sprattus sprattus in the Baltic and North Seas

    Science.gov (United States)

    Peck, Myron A.; Baumann, Hannes; Bernreuther, Matthias; Clemmesen, Catriona; Herrmann, Jens-Peter; Haslob, Holger; Huwer, Bastian; Kanstinger, Philipp; Köster, Fritz W.; Petereit, Christoph; Temming, Axel; Voss, Rudi

    2012-09-01

    The European sprat (Sprattus sprattus) was a main target species of the German GLOBEC program that investigated the trophodynamic structure and function of the Baltic and North Seas under the influence of physical forcing. This review summarizes literature on the ecophysiology of sprat with an emphasis on describing how environmental factors influence the life-history strategy of this small pelagic fish. Ontogenetic changes in feeding and growth, and the impacts of abiotic and biotic factors on vital rates are discussed with particular emphasis on the role of temperature as a constraint to life-history scheduling of this species in the Baltic Sea. A combination of field and laboratory data suggests that optimal thermal windows for growth and survival change during early life and are wider for eggs (5-17 °C) than in young (8- to 12-mm) early feeding larvae (5-12 °C). As larvae become able to successfully capture larger prey, thermal windows expand to include warmer waters. For example, 12- to 16-mm larvae can grow well at 16 °C and larger, transitional-larvae and early juveniles display the highest rates of feeding and growth at ∼18-22 °C. Gaps in knowledge are identified including the need for additional laboratory studies on the physiology and behavior of larvae (studies that will be particularly critical for biophysical modeling activities) and research addressing the role of overwinter survival as a factor shaping phenology and setting limits on the productivity of this species in areas located at the northern limits of its latitudinal range (such as the Baltic Sea). Based on stage- and temperature-specific mortality and growth potential of early life stages, our analysis suggests that young-of-the year sprat would benefit from inhabiting warmer, near-shore environments rather than the deeper-water spawning grounds such as the Bornholm Basin (central Baltic Sea). Utilization of warmer, nearshore waters (or a general increase in Baltic Sea temperatures) is

  16. Reprint of: The ecophysiology of Sprattus sprattus in the Baltic and North Seas

    Science.gov (United States)

    Peck, Myron A.; Baumann, Hannes; Bernreuther, Matthias; Clemmesen, Catriona; Herrmann, Jens-Peter; Haslob, Holger; Huwer, Bastian; Kanstinger, Philipp; Köster, Fritz W.; Petereit, Christoph; Temming, Axel; Voss, Rudi

    2012-12-01

    The European sprat (Sprattus sprattus) was a main target species of the German GLOBEC program that investigated the trophodynamic structure and function of the Baltic and North Seas under the influence of physical forcing. This review summarizes literature on the ecophysiology of sprat with an emphasis on describing how environmental factors influence the life-history strategy of this small pelagic fish. Ontogenetic changes in feeding and growth, and the impacts of abiotic and biotic factors on vital rates are discussed with particular emphasis on the role of temperature as a constraint to life-history scheduling of this species in the Baltic Sea. A combination of field and laboratory data suggests that optimal thermal windows for growth and survival change during early life and are wider for eggs (5-17 °C) than in young (8- to 12-mm) early feeding larvae (5-12 °C). As larvae become able to successfully capture larger prey, thermal windows expand to include warmer waters. For example, 12- to 16-mm larvae can grow well at 16 °C and larger, transitional-larvae and early juveniles display the highest rates of feeding and growth at ∼18-22 °C. Gaps in knowledge are identified including the need for additional laboratory studies on the physiology and behavior of larvae (studies that will be particularly critical for biophysical modeling activities) and research addressing the role of overwinter survival as a factor shaping phenology and setting limits on the productivity of this species in areas located at the northern limits of its latitudinal range (such as the Baltic Sea). Based on stage- and temperature-specific mortality and growth potential of early life stages, our analysis suggests that young-of-the year sprat would benefit from inhabiting warmer, near-shore environments rather than the deeper-water spawning grounds such as the Bornholm Basin (central Baltic Sea). Utilization of warmer, nearshore waters (or a general increase in Baltic Sea temperatures) is

  17. Widespread waterborne pollution in central Swedish lakes and the Baltic Sea from pre-industrial mining and metallurgy.

    Science.gov (United States)

    Bindler, Richard; Renberg, Ingemar; Rydberg, Johan; Andrén, Thomas

    2009-07-01

    Metal pollution is viewed as a modern problem that began in the 19th century and accelerated through the 20th century; however, in many parts of the globe this view is wrong. Here, we studied past waterborne metal pollution in lake sediments from the Bergslagen region in central Sweden, one of many historically important mining regions in Europe. With a focus on lead (including isotopes), we trace mining impacts from a local scale, through a 120-km-long river system draining into Mälaren--Sweden's third largest lake, and finally also the Baltic Sea. Comparison of sediment and peat records shows that pollution from Swedish mining was largely waterborne and that atmospheric deposition was dominated by long-range transport from other regions. Swedish ore lead is detectable from the 10th century, but the greatest impact occurred during the 16th-18th centuries with improvements occurring over recent centuries, i.e., historical pollution > modern industrial pollution.

  18. Ship emissions and the use of current air cleaning technology: contributions to air pollution and acidification in the Baltic Sea

    Science.gov (United States)

    Claremar, Björn; Haglund, Karin; Rutgersson, Anna

    2017-10-01

    The shipping sector is a significant contributor to emissions of air pollutants in marine and coastal regions. In order to achieve sustainable shipping, primarily through new regulations and techniques, greater knowledge of dispersion and deposition of air pollutants is required. Regional model calculations of the dispersion and concentration of sulfur, nitrogen, and particulate matter, as well as deposition of oxidized sulfur and nitrogen from the international maritime sector in the Baltic Sea and the North Sea, have been made for the years 2011 to 2013. The contribution from shipping is highest along shipping lanes and near large ports for concentration and dry deposition. Sulfur is the most important pollutant coupled to shipping. The contribution of both SO2 concentration and dry deposition of sulfur represented up to 80 % of the total in some regions. WHO guidelines for annual concentrations were not trespassed for any analysed pollutant, other than PM2.5 in the Netherlands, Belgium, and central Poland. However, due to the resolution of the numerical model, 50 km × 50 km, there may be higher concentrations locally close to intense shipping lanes. Wet deposition is more spread and less sensitive to model resolution. The contribution of wet deposition of sulfur and nitrogen from shipping was up to 30 % of the total wet deposition. Comparison of simulated to measured concentration at two coastal stations close to shipping lanes showed some underestimations and missed maximums, probably due to resolution of the model and underestimated ship emissions. A change in regulation for maximum sulfur content in maritime fuel, in 2015 from 1 to 0.1 %, decreases the atmospheric sulfur concentration and deposition significantly. However, due to costs related to refining, the cleaning of exhausts through scrubbers has become a possible economic solution. Open-loop scrubbers meet the air quality criteria but their consequences for the marine environment are largely unknown

  19. Matrilinear phylogeography of Atlantic salmon ( Salmo salar L.) in Europe and postglacial colonization of the Baltic Sea area

    DEFF Research Database (Denmark)

    Nilsson, J.; Gross, R.; Asplund, T.

    2001-01-01

    was analysed by RFLP of ND3/4/5/6. Representative RFLP haplotypes from different parts of the distribution area were sequenced and the phylogeny of European haplotypes and their relations to the North American lineage was described. The four common European haplotypes derive from the ancestral ND1-BBBA...... (rooting the European clade to the North American) by one-step substitutions: AAAA BBBB. The Swedish west- coast populations differ from the geographically close southern Baltic, indicating absence of inward and limited outward gene flow through the Danish straits during the last 8000 years....... Within the Baltic Sea, only three ND1 haplotypes were detected and there was no variation for ND3/4/5/6. In the whole southern Baltic and in lakes Vanern, Ladoga and Onega the haplotype AABA dominated. Proposed postglacial colonization routes to the Baltic Sea are discussed in relation to the haplotype...

  20. Baltic Nuclear workshop. Final report

    International Nuclear Information System (INIS)

    Wahlberg, L.G.

    2001-05-01

    Proceedings of the NKS/BOK-1.6 workshop on crisis communication 'Baltic Nuclear', held in Stockholm March 19 -20, 2001, with participants from the nuclear power plants and nuclear authorities in the Baltic Sea region. The main content of the workshop was founded on the principle of 'learning by doing'. The participants were therefore practically trained in how to handle a crisis from an information and communication point of view. Added to that there were three different lectures. (au)

  1. New insights into the structure and stratigraphy of the Swedish sector of the Baltic Sea sedimentary Basin from vintage 2D marine seismic data

    Science.gov (United States)

    Sopher, Daniel; Juhlin, Christopher; Erlström, Mikael

    2014-05-01

    A large dataset originally acquired by the Swedish Oil Prospecting CO. (OPAB) between 1970 and 1990 including 2D marine seismic data, well log data, core data and seismic interpretations has recently been made available by the Swedish Geological Survey (SGU). In this study this dataset has been used to produce a set of regional geoseismic sections across the Swedish sector of the Baltic Sea. Regional depth structure maps detailing the deep structure of the basin produced from previous interpretations are also presented. The Baltic Sea Basin is an intra-cratonic basin located in northern Europe. The Swedish sector of the basin is characterised primarily by two structural elements, the Hanö Bay Basin and the Baltic Syneclise. The largest of these, the Baltic Syneclise, is a large synclinal depression formed during the Caledonian Orogeny. The Hanö Bay Basin was formed during the Mesozoic due to subsidence along the Christiansø Fault Zone. The Swedish sector of the Baltic Sea Basin is primarily characterised by a sequence of shallow marine Cambrian sediments overlain by a relatively thin succession of Ordovician marine limestone and marls; these are in turn overlain by a thick layer of marl, siltstone and claystone deposited during the Silurian. Mesozoic sediments are found in the Hanö Bay and outer Hanö Bay area. These were deposited in areas of local subsidence, associated with transtensional tectonics prevalent within and adjacent to the Tornquist Zone, during the Late Carboniferous/Early Permian. Block faulting occurring throughout the Mesozoic also affected sedimentation patterns in the area. In this study a sparse grid of marine seismic reflection profiles have been reprocessed across the Swedish sector of the Baltic Sea Basin. These have been interpreted based on the available well data and synthetic seismograms. Several regional seismic profiles were constructed which detail the major structural elements and basin stratigraphy across the Swedish sector. A

  2. Contrasting seasonality in optical-biogeochemical properties of the Baltic Sea.

    Directory of Open Access Journals (Sweden)

    Stefan G H Simis

    Full Text Available Optical-biogeochemical relationships of particulate and dissolved organic matter are presented in support of remote sensing of the Baltic Sea pelagic. This system exhibits strong seasonality in phytoplankton community composition and wide gradients of chromophoric dissolved organic matter (CDOM, properties which are poorly handled by existing remote sensing algorithms. Absorption and scattering properties of particulate matter reflected the seasonality in biological (phytoplankton succession and physical (thermal stratification processes. Inherent optical properties showed much wider variability when normalized to the chlorophyll-a concentration compared to normalization to either total suspended matter dry weight or particulate organic carbon. The particle population had the largest optical variability in summer and was dominated by organic matter in both seasons. The geographic variability of CDOM and relationships with dissolved organic carbon (DOC are also presented. CDOM dominated light absorption at blue wavelengths, contributing 81% (median of the absorption by all water constituents at 400 nm and 63% at 442 nm. Consequentially, 90% of water-leaving radiance at 412 nm originated from a layer (z90 no deeper than approximately 1.0 m. With water increasingly attenuating light at longer wavelengths, a green peak in light penetration and reflectance is always present in these waters, with z90 up to 3.0-3.5 m depth, whereas z90 only exceeds 5 m at biomass < 5 mg Chla m-3. High absorption combined with a weakly scattering particle population (despite median phytoplankton biomass of 14.1 and 4.3 mg Chla m-3 in spring and summer samples, respectively, characterize this sea as a dark water body for which dedicated or exceptionally robust remote sensing techniques are required. Seasonal and regional optical-biogeochemical models, data distributions, and an extensive set of simulated remote-sensing reflectance spectra for testing of remote sensing

  3. Estimation of grey seal (Halichoerus grypus diet composition in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Karl Lundström

    2007-01-01

    Full Text Available We examined the digestive tract contents from 145 grey seals (Halichoerus grypus collected between 2001 and 2004 in the Baltic Sea. We compensated for biases introduced by erosion of otoliths, both by using additional hard-part structures other than otoliths, and species-specific size and numerical correction factors. In the absence of numerical correction factors based on feeding experiments for some species, we used correction factors based on a relationship between otolith recoveryrate and otolith width. A total of 24 prey taxa were identified but only a few species contributed substantially to the diet. The estimated diet composition was, independently of the prey number estimation method and diet composition estimation model used, dominated by herring (Clupea harengus, both by numbers and biomass. In addition to herring, common whitefish (Coregonus lavaretus and sprat (Sprattus sprattus were important prey, but cyprinids (Cyprinidae, eelpout (Zoarces viviparus, flounder (Platichtys flesus and salmon (Salmo salar also contributed significantly. Our results indicated dietary differences between grey seals of different age as well as between seals from the northern (Gulf of Bothnia and the southern (Baltic Proper Baltic Sea.

  4. 137Cs dating of laminated sediments in Swedish archipelago areas of the Baltic Sea

    International Nuclear Information System (INIS)

    Meili, M.; Jonsson, P.; Carman, R.

    1998-01-01

    In deep off-shore areas of the Baltic Sea, sediment accumulation rates are typically on the order of one or a few millimeters per year, and even less in consolidated sediments, based on laming counts and radiometric dating. In lacustrine and marine basins, the highest sedimentation rates are usually found in the deepest part, since sediments and associated contaminants are known to be gradually 'focused' from shallow to deep areas by resuspension. Accordingly, net sedimentation in coastal areas is usually low or absent due to strong erosion forces. On the other hand, coastal sediments are likely to be important in controlling the fate and turnover of contaminants that are released into coastal waters. Since little is known about the turnover of coastal sediments, in particular for heterogeneous semi-enclosed areas such as the Baltic archipelagos, a study of sediment accumulation rates has been initaited, with a focus on areas where erosion is likely to be minimal. The study is part of a project focusing on the relationship between eutrophication and contaminant cycling (EUCON). 88 sediment cores were collected during summer 1996 from accumulation bottoms of 18 more or less protected bays in archipalgo areas along the swedish coast of the Baltic Sea

  5. No increase in marine microplastic concentration over the last three decades – A case study from the Baltic Sea

    OpenAIRE

    Beer, Sabrina; Garm, Anders; Huwer, Bastian; Dierking, Jan; Nielsen, Torkel Gissel

    2017-01-01

    Highlights: • First long-term study on microplastic in the marine environment • Case study based on a unique sample set from the highly human impacted Baltic Sea • Water column microplastic concentration constant over past three decades • Microplastic concentration in forage fish constant over past three decades • We hypothesise that household waste is the dominant source of Baltic marine plastics. Abstract Microplastic is considered a potential threat to marine life as i...

  6. Nitrate source identification in the Baltic Sea using its isotopic ratios in combination with a Bayesian isotope mixing model

    Science.gov (United States)

    Korth, F.; Deutsch, B.; Frey, C.; Moros, C.; Voss, M.

    2014-09-01

    Nitrate (NO3-) is the major nutrient responsible for coastal eutrophication worldwide and its production is related to intensive food production and fossil-fuel combustion. In the Baltic Sea NO3- inputs have increased 4-fold over recent decades and now remain constantly high. NO3- source identification is therefore an important consideration in environmental management strategies. In this study focusing on the Baltic Sea, we used a method to estimate the proportional contributions of NO3- from atmospheric deposition, N2 fixation, and runoff from pristine soils as well as from agricultural land. Our approach combines data on the dual isotopes of NO3- (δ15N-NO3- and δ18O-NO3-) in winter surface waters with a Bayesian isotope mixing model (Stable Isotope Analysis in R, SIAR). Based on data gathered from 47 sampling locations over the entire Baltic Sea, the majority of the NO3- in the southern Baltic was shown to derive from runoff from agricultural land (33-100%), whereas in the northern Baltic, i.e. the Gulf of Bothnia, NO3- originates from nitrification in pristine soils (34-100%). Atmospheric deposition accounts for only a small percentage of NO3- levels in the Baltic Sea, except for contributions from northern rivers, where the levels of atmospheric NO3- are higher. An additional important source in the central Baltic Sea is N2 fixation by diazotrophs, which contributes 49-65% of the overall NO3- pool at this site. The results obtained with this method are in good agreement with source estimates based upon δ15N values in sediments and a three-dimensional ecosystem model, ERGOM. We suggest that this approach can be easily modified to determine NO3- sources in other marginal seas or larger near-coastal areas where NO3- is abundant in winter surface waters when fractionation processes are minor.

  7. Nitrate source identification using its isotopic ratios in combination with a Bayesian isotope mixing model in the Baltic Sea

    Science.gov (United States)

    Korth, F.; Deutsch, B.; Frey, C.; Moros, C.; Voss, M.

    2014-04-01

    Nitrate (NO3-) is the major nutrient responsible for coastal eutrophication worldwide and its production is related to intensive food production and fossil-fuel combustion. In the Baltic Sea NO3-inputs have increased four-fold over the last decades and now remain constantly high. NO3- source identification is therefore an important consideration in environmental management strategies. In this study focusing on the Baltic Sea, we used a method to estimate the proportional contributions of NO3- from atmospheric deposition, N2 fixation, and runoff from pristine soils as well as from agricultural land. Our approach combines data on the dual isotopes of NO3- (δ15N-NO3- and δ18O-NO3-) in winter surface waters with a Bayesian isotope mixing model (Stable Isotope Analysis in R, SIAR). Based on data gathered from 46 sampling locations over the entire Baltic Sea, the majority of the NO3- in the southern Baltic was shown to derive from runoff from agricultural land (30-70%), whereas in the northern Baltic, i.e., the Gulf of Bothnia, NO3- originates from nitrification in pristine soils (47-100%). Atmospheric deposition accounts for only a small percentage of NO3- levels in the Baltic Sea, except for contributions from northern rivers, where the levels of atmospheric NO3- are higher. An additional important source in the central Baltic Sea is N2 fixation by diazotrophs, which contributes 31-62% of the overall NO3- pool at this site. The results obtained with this method are in good agreement with source estimates based upon δ15N values in sediments and a three-dimensional ecosystem model, ERGOM. We suggest that this approach can be easily modified to determine NO3- sources in other marginal seas or larger near-coastal areas where NO3- is abundant in winter surface waters when fractionation processes are minor.

  8. A model assessment of polychlorinated dibenzo-p-dioxin and dibenzofuran sources and fate in the Baltic Sea.

    Science.gov (United States)

    Armitage, James M; McLachlan, Michael S; Wiberg, Karin; Jonsson, Per

    2009-06-01

    The contamination of the Baltic Sea with polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) has resulted in restrictions on the marketing and consumption of Baltic Sea fish, making this a priority environmental issue in the European Union. To date there is no consensus on the relative importance of different sources of PCDD/Fs to the Baltic Sea, and hence no consensus on how to address this issue. In this work we synthesized the available information to create a PCDD/F budget for the Baltic Sea, focusing on the two largest basins, the Bothnian Sea and the Baltic Proper. The non-steady state multimedia fate and transport model POPCYCLING-Baltic was employed, using recent data for PCDD/F concentrations in air and sediment as boundary conditions. The PCDD/F concentrations in water predicted by the model were in good agreement with recent measurements. The budget demonstrated that atmospheric deposition was the dominant source of PCDD/Fs to the basins as a whole. This conclusion was supported by a statistical comparison of the PCDD/F congener patterns in surface sediments from accumulation bottoms with the patterns in ambient air, bulk atmospheric deposition, and a range of potential industrial sources. Prospective model simulations indicated that the PCDD/F concentrations in the water column will continue to decrease in the coming years due to the slow response of the Baltic Sea system to falling PCDD/F inputs in the last decades, but that the decrease would be more pronounced if ambient air concentrations were to drop further in the future, for instance as a result of reduced emissions. The study illustrates the usefulness of using monitoring data and multimedia models in an integrated fashion to address complex organic contaminant issues.

  9. Baltijskaja Evropa: ot idei k strategii [From the idea to the strategy of Baltic Europe

    Directory of Open Access Journals (Sweden)

    Palmowski Tadeusz

    2009-01-01

    Full Text Available This article focuses on the historic prerequisites and forms of international cooperation in the Baltic region (“Baltic cooperation”. According to the author, Baltic Europe is being formed as a single administrative, economic, cultural and infrastructural area, which could become a new economic and cultural center of Europe. Special emphasis is given to policies and strategies of the EU in the Baltic Sea region.

  10. Magnetic Repeat Station Network on the Baltic Sea — Why So Needed?

    Directory of Open Access Journals (Sweden)

    Welker Elżbieta

    2017-12-01

    Full Text Available The development of navigation systems requires more and more accurate base data. Currently, attention is paid to utilization of geophysical fields — gravitational and magnetic ones — for navigation purposes. The Earth’s magnetic field distribution — both onshore and offshore — is complicated and variable in time. Hence, it is essential to precisely know the secular variations in the area of interest. In the case of Baltic Sea, this involves establishing (re-establishing of a marine network of secular points (repeat stations and regular magnetic measurements of the three independent components of the Earth’s magnetic field. Such measurements require equipment that ensures not only high stability, but also information about sensors’ orientation in relation to geographic north and to the level. This article presents a new project of the Baltic network of repeat stations and gives a solution for the instruments usable for quasi-absolute magnetic measurements.

  11. Polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and non-ortho-PCBs in eggs of white-tailed sea eagles collected along the Swedish coast in the Baltic Sea.

    Science.gov (United States)

    Nordlöf, Ulrika; Helander, Björn; Zebühr, Yngve; Bignert, Anders; Asplund, Lillemor

    2012-11-01

    Concentrations of polychlorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDF), and dioxin-like non-ortho-PCBs were measured in white-tailed sea eagle (WTSE) eagle eggs collected along the Swedish coast of the Baltic Sea during the period 1992-2004. The eggs represent two different subpopulations with significantly different nestling brood sizes; the Baltic Proper (BP) with an approximately normal nestling brood size (1.62), and the south Bothnian Sea (sBS) with reduced nestling brood size (1.22) combined with a significantly higher rate of dead eggs. The aim was to investigate if this difference in reproductive outcome was linked to differences in exposure to dioxin-like compounds. Three eggs collected in Greenland in 2000 were included in the study to provide a reference sea eagle population outside of the Baltic Sea region. The concentrations of ∑PCDD, ∑PCDF and ∑non-ortho-PCB in the two subpopulations from the Baltic Sea (BS) region ranged from 0.41-4.1, 1.2-5.3 and 180-970 ng/g lipids, respectively, while in the Greenland population the ranges were 0.11-0.16, 0.22-0.33 and 57-83 ng/g lipid, respectively. 2,3,4,7,8-PCDF was the predominant congener in all areas and accounted for on average 31-49% of the total ∑PCDD/F concentrations. The total toxic equivalents (TEQ) in sBS WTSEs were higher (approximately 39 ng TEQ/g lipid) than reported in eggs for many other birds, and the major contributors to the TEQ in the Baltic Sea were the non-ortho-PCBs. A principal component analysis (PCA) showed a difference in congener pattern between the two Baltic regions that was statistically significant (Hotelling's T(2) test). We found no significant differences in the total TEQ between the two populations (sBS-BP) and thus no evidence was found linking the reproductive impairment in WTSE in sBS to the concentrations of PCDD/Fs or non-ortho-PCBs in the eggs. Copyright © 2012 Elsevier B.V. All rights reserved.

  12. [The "Baltic Frontier" revisited. Power structures and gross-cultural interactions in the Baltic region. Proceedings of the international symposium in Florence, February 29th and March Ist, 2008] / Karsten Brüggemann

    Index Scriptorium Estoniae

    Brüggemann, Karsten, 1965-

    2010-01-01

    Arvustus: The "Baltic Frontier" revisited. Power structures and gross-cultural interactions in the Baltic region. Proceedings of the international symposium in Florence, February 29th and March Ist, 2008. Vienna, 2009

  13. Using ship-borne GNSS data for geoid model validation at the Baltic Sea

    Science.gov (United States)

    Nordman, Maaria; Kuokkanen, Jaakko; Bilker-Koivula, Mirjam; Koivula, Hannu; Häkli, Pasi; Lahtinen, Sonja

    2017-04-01

    We present a study of geoid model validation using ship-borne GNSS data on the Bothnian Bay of the Baltic Sea. In autumn 2015 a dedicated gravity survey took place in the Bothnian Bay on board of the surveying vessel Airisto as a part of the FAMOS (Finalising surveys for the Baltic motorways of the sea) Freja project, which is supported by the European Commission with the Connecting Europe Facility. The gravity data was collected to test older existing gravity data in the area and to contribute to a new improved geoid model for the Baltic Sea. The raw GNSS and IMU data of the vessel were recorded in order to study the possibilities for validating geoid models at sea. In order to derive geoid heights from GNSS-measurements at sea, the GNSS measurements must first be reduced to sea level. The instant sea level, also called sea surface height, must then be modelled and removed in order to get the GNSS positions at the zero height. In theory, the resulting GNSS heights are the geoid heights, giving the distance between the ellipsoid and the geoid surface. There were altogether 46 lines measured during the campaign on the area. The 1 Hz GNSS-IMU observations were post-processed using the Applanix POSPac MMS 7.1 software. Different processing options were tested and the Single Base -solution was found to be the best strategy. There were some issues with the quality of the data and cycle slips and thus, 37 of the lines were of adequate quality for the geoid validation. The final coordinates were transferred to the coordinate systems related to the geoid models used. Translation of the processed heights to sea level was performed taking the pitch and roll effects of the vessel into account. Also the effects of static and dynamic draft (squat) were applied. For the reduction from sea surface to geoid surface, the sea surface heights were derived from tide gauge data and also from a physical model for the Baltic Sea. The residual errors between the GNSS-derived geoid heights

  14. The influence of major rivers discharges on physical and biological state of the Baltic Sea

    Science.gov (United States)

    Dudkowska, Aleksandra; Cieszyńska, Agata

    2017-04-01

    River discharges are one of very important factors affecting the marine ecosystem functioning. Land-originated inflows, carrying fresh, nutrient-rich water can be often defined as the factor responsible for creating new physical and biochemical conditions, which in turn can create more or less favorable medium for many marine organisms to run their biological cycles within. In some basins, the Baltic Sea including, land-originated water inflows are usually associated with the eutrophication and are the factors, which trigger this process. It is clear that not only because of the riverine discharges, the nutrients levels in the sea increase. To exemplify in the case of phosphorus, the nutrient concentration can be raised by 'internal re-loading', which is caused by phosphorus pools accumulated in the sediments of the sea bed being released back to the water under anoxic conditions. In the present study, we focused on the major Baltic rivers inflows and their impact on the environmental state of the basin. We have examined river discharges (expressed as volumetric inflow in m3 s-1) and the nutrient load (phosphorus, nitrogen) accompanied by these inflows. Data for our investigation were derived from EHype model (Swedish Meteorological Institute Server, http://hypeweb.smhi.se/europehype/time-series/). From the river discharge model data set spanned over 1981 - 2010, we have calculated long-term trends and the basic statistics: annual and monthly means, percentiles (10th, 50th, 90th). The trends were defined to be statistically significant at the confidence level of 95% (p contract number: 2012/07/N/ST10/03485) entitled: "Improved understanding of phytoplankton blooms in the Baltic Sea based on numerical models and existing data sets". The Author (AC) received funding from National Centre of Sciences in doctoral scholarship program (contract number: 2016/20/T/ST10/00214).

  15. Tectonic framework of the Hanoe Bay area, southern Baltic Sea

    International Nuclear Information System (INIS)

    Wannaes, K.O.; Floden, T.

    1994-06-01

    The tectonic framework and the general geologic development of the Hanoe Bay, from the Scanian coast in the west to south of Oeland in the east, has been investigated by means of reflection seismic methods. The Hanoe Bay is in this paper subdivided into four areas of different geologic settings. These are: 1) The Hanoe Bay slope, which forms a southward dipping continuation of the rigid Blekinge coastal plain. 2) The eastward dipping Kalmarsund Slope, which southwards from Oeland forms the western part of the Paleozoic Baltic Syneclise. 3) The Mesozoic Hanoe Bay Halfgraben, which forms the central and southern parts of the Hanoe Bay. The ongoing subsidence of the Halfgraben is estimated to be in the order of 20-60 m during the Quaternary. 4) The Yoldia Structural Element, which forms a deformed, tilted and possibly rotated block of Paleozoic bedrock located east of the Hanoe Bay Halfgraben. Two tectonic phases dominate the post-Paleozoic development of the Hanoe Bay, these are: 1) The Early Kimmerian phase, which initiated subsidence and reactivated older faults. 2) The Late Cretaceous phase, which is the main subsidence phase of the Hanoe Bay Halfgraben. The tectonic fault pattern of the Hanoe Bay is dominated by three directions, i.e. NW-SE, NE-SW and WNW-ESE. The two main tectonic elements of the area are the Kullen-Christiansoe Ridge System (NW-SE) and the Bornholm Gat Tectonic Zone (NE-SW). Sinistral strike-slip movements in order of 2-3 km are interpreted to have occurred along the Bornholm Gat Tectonic Zone during the late Cretaceous. 20 refs, 19 figs

  16. Gymnodinium corollarium sp. nov. (Dinophyceae) - a new cold-water dinoflagellate responsible for cyst sedimentation events in the Baltic Sea

    DEFF Research Database (Denmark)

    Sundström, Annica; Kremp, Anke; Daugbjerg, Niels

    2009-01-01

    unidentified cyst type commonly found in sediment trap samples collected from the northern and central open Baltic Sea. Based on LSU rDNA comparison, these cysts were assigned to G. corollarium. The cysts have been observed in many parts of the Baltic Sea, indicating the ecologic versatility of the species...

  17. Temperature and salinity profile data collected by bottle on multiple cruises in the Baltic Sea, Baffin Bay, Davis Strait, the North Atlantic Ocean, and the North Sea from 02 January 1985 to 13 November 1989 (NODC Accession 0000056)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile and nutrients data were collected using bottle casts from DANA and other platforms in Baffin Sea, Baltic Sea, Davis Strait, North Sea, and North...

  18. Baltic Sea Maritime Spatial Planning for Sustainable Ecosystem Services

    DEFF Research Database (Denmark)

    Hansen, Henning Sten; Schrøder, Anne Lise

    2017-01-01

    in the marine and maritime sectors with great potential for innovation and economic growth. Holistic spatial planning systems supporting sustainable development have proved themselves in terrestrial planning and are also needed at sea. Due to this reason, the BONUS BASMATI project is based on the ecosystem...... services approach to assist in assessing sustainable solutions corresponding to policy goals....

  19. Baltic Sea Maritime Spatial Planning for Sustainable Ecosystem Services

    DEFF Research Database (Denmark)

    Hansen, Henning Sten; Schrøder, Anne Lise

    2017-01-01

    The current and potential use of the seas and oceans is often called the ‘Blue Economy’. Recently, the European Commission launched its Blue Growth Strategy on the opportunities for marine and maritime sustainable growth. The European Commission considers that Blue Growth is a long-term strategy...

  20. Multimission satellite altimetric data validation in the Baltic Sea

    DEFF Research Database (Denmark)

    Cheng, Yongcun; Andersen, Ole Baltazar; Knudsen, Per

    2014-01-01

    altimetric measurements increases of 96% by replacing the radiometer wet troposphere correction with model based correction. The results indicate the high quality of the along-track altimetry measurements in the semi-closed sea, which shows good agreement with tide gauge data except in the shallow waters...

  1. Distribution of N2O in the Baltic Sea during transition from anoxic to oxic conditions

    Directory of Open Access Journals (Sweden)

    S. Walter

    2006-01-01

    Full Text Available In January 2003, a major inflow of cold and oxygen-rich North Sea Water terminated an ongoing stagnation period in parts of the central Baltic Sea. In order to investigate the role of North Sea Water inflow in the production of nitrous oxide (N2O, we measured dissolved and atmospheric N2O at 26 stations in the southern and central Baltic Sea in October 2003. At the time of our cruise, water renewal had proceeded to the eastern Gotland Basin, whereas the western Gotland Basin was still unaffected by the inflow. The deep water renewal was detectable in the distributions of temperature, salinity, and oxygen concentrations as well as in the distribution of the N2O concentrations: Shallow stations in the Kiel Bight and Pomeranian Bight were well-ventilated with uniform N2O concentrations near equilibrium throughout the water column. In contrast, stations in the deep basins, such as the Bornholm and the Gotland Deep, showed a clear stratification with deep water affected by North Sea Water. Inflowing North Sea Water led to changed environmental conditions, especially enhanced oxygen (O2 or declining hydrogen sulphide (H2S concentrations, thus, affecting the conditions for the production of N2O. Pattern of N2O profiles and correlations with parameters like oxygen and nitrate differed between the basins. Because of the positive correlation between ΔN2O and AOU in oxic waters the dominant production pathway seems to be nitrification rather than denitrification. Advection of N2O by North Sea Water was found to be of minor importance. A rough budget revealed a significant surplus of in situ produced N2O after the inflow. However, due to the permanent halocline, it can be assumed that the N2O produced does not reach the atmosphere. Hydrographic aspects therefore are decisive factors determining the final release of N2O produced to the atmosphere.

  2. A statistical approach to coastal upwelling in the Baltic Sea based on the analysis of satellite data for 1990-2009

    Directory of Open Access Journals (Sweden)

    Andreas Lehmann

    2012-06-01

    Full Text Available A statistical analysis of Baltic Sea upwelling has been carried out to cover, for the first time, the entire sea area for the period 1990-2009. Weekly composite SST maps based on NOAA/AVHRR satellite data were used to evaluate the location and frequency of upwelling. The results obtained were analysed and compared with earlier studies with excellent agreement. Our study enables the most intense upwelling areas in the entire Baltic Sea to be evaluated. According to the analysis of 443 SST maps, the most common upwelling regions are found off the Swedish south and east coasts (frequency 10-25%, the Swedish coast of the Bothnian Bay (16%, the southern tip of Gotland (up to 15%, and the Finnish coast of the Gulf of Finland (up to 15%. Pronounced upwelling also occurs off the Estonian coast and the Baltic east coast (up to 15%, the Polish coast and the west coast of Rügen (10-15%; otherwise the upwelling frequency was between 5 and 10%. Additionally, simulated SST distributions derived from a Baltic Sea numerical model were analysed for the same period. Furthermore, at specific positions close to the coastline, surface winds based on the SMHI meteorological data base were analysed for the same 20-year period. Wind components parallel to the coast were discriminated into favourable and unfavourable winds forcing upwelling. The obtained frequencies of upwelling-favourable winds fit very well the observed upwelling frequencies derived from satellite SST maps. A positive trend of upwelling frequencies along the Swedish east coast and the Finnish coast of the Gulf of Finland was calculated for the period 1990-2009.

  3. {sup 241}Pu concentrations in water, plankton and fish from the southern Baltic Sea

    Energy Technology Data Exchange (ETDEWEB)

    Struminska-Parulska, D.I.; Skwarzec, B. [Gdansk, Univ. (Poland). Facuty of Chemistry

    2013-08-01

    The aim of the work was to determine {sup 241}Pu activities in different components (water, plankton and fish) of the southern Baltic Sea ecosystem. Measurement of {sup 241}Pu in the samples was done indirectly by determining the increment in {sup 241}Am from the decay of the {beta}-emitting {sup 241}Pu in samples collected 10-15 years after the Chernobyl accident. Enhanced levels of {sup 241}Pu were observed in all analyzed Baltic samples. The highest {sup 241}Pu concentrations in fish were found in Perciformes: benthic round goby (0.863 {+-} 0.066 mBq/g ww) and pelagic perch (0.666 {+-} 0.001 mBq/g ww). Plutonium is also non-uniformly distributed in the organs and tissues of the analyzed fish; especially pelagic herring and cod as well as benthic flounder. Most of {sup 241}Pu in flounder, herring and cod is located in soft tissues, especially digestive organs (stomach, intestine, liver). The annual individual effective doses calculated on the basis of {sup 241}Pu concentrations in fish indicated that the impact of the consumption of {sup 241}Pu containing Baltic fish on the annual effective dose for a statistical inhabitant of Poland was very small. (orig.)

  4. Nitrification and the ammonia-oxidizing communities in the central Baltic Sea water column

    Science.gov (United States)

    Jäntti, Helena; Ward, Bess B.; Dippner, Joachim W.; Hietanen, Susanna

    2018-03-01

    The redoxclines that form between the oxic and anoxic water layers in the central Baltic Sea are sites of intensive nitrogen cycling. To gain better understanding of nitrification, we measured the biogeochemical properties along with potential nitrification rates and analyzed the assemblages of ammonia-oxidizing bacteria and archaea using functional gene microarrays. To estimate nitrification in the entire water column, we constructed a regression model for the nitrification rates and applied it to the conditions prevailing in the area in 2008-2012. The highest ammonia oxidation rates were found in a thin layer at the top of the redoxcline and the rates quickly decreased below detection limit when oxygen was exhausted. This is probably because extensive suboxic layers, which are known to harbor pelagic nitrification, are formed only for short periods after inflows in the Baltic Sea. The nitrification rates were some of the highest measured in the water columns, but the thickness of the layer where conditions were favorable for nitrification, was very small and it remained fairly stable between years. However, the depth of the nitrification layer varied substantially between years, particularly in the eastern Gotland Basin (EGB) due to turbulence in the water column. The ammonia oxidizer communities clustered differently between the eastern and western Gotland Basin (WGB) and the composition of ammonia-oxidizing assemblages correlated with the environmental variables. The ammonia oxidizer community composition was more even in the EGB, which may be related to physical instability of the redoxcline that does not allow predominance of a single archetype, whereas in the WGB, where the position of the redoxcline is more constant, the ammonia-oxidizing community was less even. Overall the ammonia-oxidizing communities in the Baltic Sea redoxclines were very evenly distributed compared to other marine environments where microarrays have been applied previously.

  5. Atmospheric pathways of chlorinated pesticides and natural bromoanisoles in the northern Baltic Sea and its catchment.

    Science.gov (United States)

    Bidleman, Terry; Agosta, Kathleen; Andersson, Agneta; Brorström-Lundén, Eva; Haglund, Peter; Hansson, Katarina; Laudon, Hjalmar; Newton, Seth; Nygren, Olle; Ripszam, Matyas; Tysklind, Mats; Wiberg, Karin

    2015-06-01

    Long-range atmospheric transport is a major pathway for delivering persistent organic pollutants to the oceans. Atmospheric deposition and volatilization of chlorinated pesticides and algae-produced bromoanisoles (BAs) were estimated for Bothnian Bay, northern Baltic Sea, based on air and water concentrations measured in 2011-2012. Pesticide fluxes were estimated using monthly air and water temperatures and assuming 4 months ice cover when no exchange occurs. Fluxes were predicted to increase by about 50 % under a 2069-2099 prediction scenario of higher temperatures and no ice. Total atmospheric loadings to Bothnian Bay and its catchment were derived from air-sea gas exchange and "bulk" (precipitation + dry particle) deposition, resulting in net gains of 53 and 46 kg year(-1) for endosulfans and hexachlorocyclohexanes, respectively, and net loss of 10 kg year(-1) for chlordanes. Volatilization of BAs releases bromine to the atmosphere and may limit their residence time in Bothnian Bay. This initial study provides baseline information for future investigations of climate change on biogeochemical cycles in the northern Baltic Sea and its catchment.

  6. Life cycle and spring phenology of Temora longicornis in the Baltic Sea

    DEFF Research Database (Denmark)

    Dutz, Jörg; Mohrholz, V.; van Beusekom, J. E. E.

    2010-01-01

    The seasonal variation in abundance, biomass and vertical distribution of nauplii and copepodites of Temora longicornis in the Bornholm Basin was studied from March 2002 to May 2003 to understand the overwintering, spring development and life cycle of this species in the Baltic Sea. The analysis...... of the life cycle by means of stage structure, copepodite length and stage duration revealed that T. longicornis produced 5 to 6 generations yr–1. The species overwintered in low abundance as an active, slowly developing generation with adults appearing from February/March onwards. The onset of the spring...

  7. Identification of Baltic Sea salmon based on PCB and dioxin profiles

    DEFF Research Database (Denmark)

    Sørensen, Søren; Lund, Kirsten H.; Cederberg, Tommy Licht

    2016-01-01

    Salmon and herring from the Baltic Sea are prohibited for sale for human consumption in the European Union or only allowed to be marketed under certain conditions. Fish from certain specific geographical origins also command higher prices in the market than fish from elsewhere. It is, therefore...... through 2015. Principal component analyses (PCA) were built from the combined PCB and PCDD/F profile as well as separately from the individual PCB and PCDD/F profiles. Use of the PCB profile for the PCA provided stronger power to distinguish between salmon of different geographical origin than using...... the PCDD/F profile or the combined profiles....

  8. Correlation between the seasonal distribution of harbour porpoises and their prey in the Sound, Baltic Sea

    DEFF Research Database (Denmark)

    Sveegaard, Signe; Andreasen, Heidi; Mouritsen, Kim N.

    2012-01-01

    Low densities of harbour porpoises in winter (November–March) and high densities in summer (April–October) were found in the Sound, connecting the Baltic Sea and Kattegat. Due to their high energy requirements, it is hypothesized that the density of harbour porpoises is related to local prey...... herring and Atlantic cod were equally important during the low-density season. Prey availability and predictability are suggested as the main drivers for harbour porpoise distribution, and this could be caused by the formation of frontal zones in spring in the northern part of the Sound, leading to prey...

  9. Air pollution abatement around the Baltic Sea. From a national to an international perspective

    Energy Technology Data Exchange (ETDEWEB)

    Kankaanpaeae, K.; Aittoniemi, P.; Kaessi, T. [IVO International Ltd, Vantaa (Finland)

    1995-12-31

    Environmental burden and environmental protection activities, together with the cost-effectiveness of emission reduction and the economic possibilities of financing the environmental investments, vary greatly between the countries around the Baltic Sea. The objective of this presentation is to outline solutions based on a new approach to emission reflection, larger than the national scale. Especially the applications of the recently introduced Joint Implementation (JI) principle will be discussed. The presentation mainly deals with the acidic sulphur dioxide (SO{sub 2}) emissions related to power production. (author)

  10. Climate Change Impacts on Marine Biodiversity and Habitats in the Baltic Sea - and Possible Human Adaptations

    DEFF Research Database (Denmark)

    Josefson, Alf B.; Göke, Cordula; Christensen, Jesper Phillip Aagaard

    Climate change is likely to induce substantial changes in the Baltic Sea, as it is a species-poor ecosystem where virtually all species live close to their environmental tolerance range. The vitality of the fish stocks and viability of fisheries should be supported by consideration of global change...... in the management of environment (protection, sustainable use and restoration) and of fisheries. A shift away from sector-by-sector management towards the integrated management of land, water and living resources may be necessary to sustain the productivity of fish stocks. The climate change and other concomitant...

  11. Arsenic concentrations correlate with salinity for fish taken from the North Sea and Baltic waters

    DEFF Research Database (Denmark)

    Larsen, Erik Huusfeldt; Francesconi, K. A.

    2003-01-01

    Total arsenic concentrations were determined in three teleost species (herring Clupea harengus; cod Gadus morhua, and flounder Platichthys flesus) taken. from four locations in the Baltic and North Sea with salinities ranging from 8 to 32 psu. Individual arsenic concentrations ranged from 0.......04 to 10.9 mg/kg wet mass, and there was a positive linear relationship between arsenic concentration and salinity for all three species (r(2) 0.44 to 0.72, all P arsenic than do freshwater fish, the data reported...... here are the first showing a relationship between the total arsenic concentration in fish and salinity....

  12. Spatio-temporal dynamics of cod nursery areas in the Baltic Sea

    Science.gov (United States)

    Hinrichsen, H.-H.; von Dewitz, B.; Lehmann, A.; Bergström, U.; Hüssy, K.

    2017-06-01

    In this study the drift of eastern Baltic cod larvae and juveniles spawned within the historical eastern Baltic cod spawning grounds was investigated by detailed drift model simulations for the years 1971-2010, to examine the spatio-temporal dynamics of environmental suitability in the nursery areas of juvenile cod settlement. The results of the long-term model scenario runs, where juvenile cod were treated as simulated passively drifting particles, enabled us to find strong indications for long-term variations of settlement and potentially the reproduction success of the historically important eastern Baltic cod nursery grounds. Only low proportions of juveniles hatched in the Arkona Basin and in the Gotland Basin were able to settle in their respective spawning ground. Ocean currents were either unfavorable for the juveniles to reach suitable habitats or transported the juveniles to nursery grounds of neighboring subdivisions. Juveniles which hatched in the Bornholm Basin were most widely dispersed and showed the highest settlement probability, while the second highest settlement probability and horizontal dispersal was observed for juveniles originating from the Gdansk Deep. In a long-term perspective, wind-driven transport of larvae/juveniles positively affected the settlement success predominately in the Bornholm Basin and in the Bay of Gdansk. The Bornholm Basin has the potential to contribute on average 54% and the Bay of Gdansk 11% to the production of juveniles in the Baltic Sea. Furthermore, transport of juveniles surviving to the age of settlement with origin in the Bornholm Basin contributed on average 13 and 11% to the total settlement in the Arkona Basin and in the Gdansk Deep, respectively. The time-series of the simulated occupied juvenile cod habitat in the Bornholm Basin and in the Gdansk Deep showed a similar declining trend as the Fulton's K condition factor of demersal 1-group cod, which may confirm the importance of oxygen-dependent habitat

  13. Intercomparison studies on distribution and coassociations of heavy metals in liver, kidney, and muscle of harbor porpoise, Phocoena phocoena , from southern Baltic Sea and coastal waters of Denmark and Greenland

    DEFF Research Database (Denmark)

    Szefer, P.; Zdrojewska, I.; Jensen, Jette Donovan

    2002-01-01

    The concentrations of selected metals such as Cd, Pb. Cu, Zn, Cr, Ni, Mn, and Fe were determined in liver, kidney, and muscle of harbor porpoise (Phocoena phocoena) front three geographical regions, i.e.. the Baltic Sea and Danish and Greenland coastal waters. The concentrations of Cd in liver an...

  14. Model calculations of the effects of present and future emissions of air pollutants from shipping in the Baltic Sea and the North Sea

    NARCIS (Netherlands)

    Jonson, J.E.; Jalkanen, J.P.; Johansson, L.; Gauss, M.; Gon, H.A.C.D. van der

    2015-01-01

    Land-based emissions of air pollutants in Europe have steadily decreased over the past two decades, and this decrease is expected to continue. Within the same time span emissions from shipping have increased in EU ports and in the Baltic Sea and the North Sea, defined as SECAs (sulfur emission

  15. A methodology for research on international cooperation on marine environment protection: application of the Baltic Sea practices to the northern seas

    OpenAIRE

    Kharlampyeva Nadezhda

    2011-01-01

    This article is dedicated to the methodology for the study of international cooperation on marine environment protection. The author suggests applying the practices of marine environment protection in the Baltic Sea to the northern seas as well as examining earlier projects for the effective implementation of interdisciplinary initiatives bringing together international law, international relations and world politics.

  16. A methodology for research on international cooperation on marine environment protection: application of the Baltic Sea practices to the northern seas

    Directory of Open Access Journals (Sweden)

    Kharlampyeva Nadezhda

    2011-03-01

    Full Text Available This article is dedicated to the methodology for the study of international cooperation on marine environment protection. The author suggests applying the practices of marine environment protection in the Baltic Sea to the northern seas as well as examining earlier projects for the effective implementation of interdisciplinary initiatives bringing together international law, international relations and world politics.

  17. Strontium concentration in the Baltic Sea in 1974-1975 and its correlation with some hydrodynamic characteristics

    International Nuclear Information System (INIS)

    Stankajtis, A.K.; Styro, D.B.

    1978-01-01

    Strontium concentration data in the surface and deep layers of the Baltic Sea water are presented. Strontium concentration in the surface layer varies from 1.6 mg/1 to 2.2 mg/1 and that at a depth of 50 m - from 2.0 to 3.2 mg/1. Maximum concentration (4.5 mg/1) is at a depth of 440 m. Strontium concentration data are correlated with some hydrometeorological parameters (wind velocity and direction, water temperature, salinity). It has been indicated that water mass transfer in the Baltic Sea may be traced using the data on strontium concentration variations

  18. Zoobenthos as indicators of ecological status in coastal brackish waters: a comparative study from the Baltic Sea.

    Science.gov (United States)

    Perus, Jens; Bonsdorff, Erik; Bäck, Saara; Lax, Hans-Göran; Villnäs, Anna; Westberg, Vincent

    2007-04-01

    A new method for classifying soft-bottom zoobenthic assemblages along the Finnish coasts (northern Baltic Sea) is presented and tested against traditional physicochemical monitoring data in the complex Archipelago Sea. Although multivariate methods for assessing the state of the marine environment have become widely used, few numerical indices can operate over a wide salinity range. We compare indices currently in use and propose a new index, BBI (brackish water benthic index), for the low-saline and species-poor Baltic coastal waters. BBI offers a salinity-corrected tool for classification of the soft-bottom zoobenthos under the demands of the European Union Water Framework Directive.

  19. Variability and Dynamics of Dissolved Oxygen in the Transition Zone of the North Sea and the Baltic Sea

    DEFF Research Database (Denmark)

    Jonasson, Lars

    information about the seasonal to decadal oxygen variations in the bottom water of the Kattegat, the Danish Straits, the Sound and the Western Baltic Sea and investigates the relative importance of physical and biogeochemical processes, climate change and nutrient load reductions on the oxygen variability...... the estimated oxygen consumption trends and the concentration of dissolved inorganic nitrogen. This study highlights the necessity to consider the combined effect of climate change and eutrophication on the oxygen conditions when assessing the nutrient reduction efforts. Climatic changes have lowered the oxygen...

  20. Connectivity of larval cod in the transition area between North Sea and Baltic Sea and potential implications for fisheries management

    DEFF Research Database (Denmark)

    Huwer, Bastian; Hinrichsen, H.-H.; Hüssy, Karin

    2016-01-01

    Connectivity of pelagic, early life stages via transport by ocean currents may affect survival chances of offspring, recruitment success, and mixing of stocks across management units. Based on drift model studies, transport patterns of particles representing exogenously feeding cod larvae...... in the transition area between North Sea and Baltic were investigated to (i) determine long-term trends and variability in advective transport of larvae from spawning grounds to juvenile nursery areas, (ii) estimate the degree of exchange between different management areas, and (iii) compare the results...

  1. Problems of the results interpretation from different sequences and the better integration on the pollen data of the Baltic region

    Science.gov (United States)

    Sapelko, Tatyana

    2017-04-01

    In the study of the Pleistocene and Holocene sediments we are facing with various difficulties. First of all there is the problem of correlation between data from sequences of different genesis. Sometimes we can get different results when we use for the study sediments of the sea, lake, archaeological site or the sequences of other origin. An attempt to compare the results obtained from different types of sequences was made on the Karelian Isthmus (NW Russia). Different stages of development of the Baltic Sea were studied through the sequence of the marine sediments from the modern Baltic Sea basin, through the lake in the territory, which was flooded in the transgressive stages of the Baltic Sea development; through the peat witnessing regressive stages of the Baltic and through the archaeological sites, fixing the highest possible Baltic waters level. We have examined sequences of different origin using multiproxy analysis, which was the main pollen analysis. It is not very accurate to reconstruct the environmental changes in the past using data only from archaeological sites without comparing the results of studies with similar data from the natural sites (lakes, peat, etc.). Conversely, some vegetation changes under the human influence could be wrongly attributed to climatic fluctuations basing only upon the results of lake and bog sediments studies. In the lake sediments we can trace the natural background of the dynamics of surrounding landscape, the natural laws of changes in vegetation and in climate. In the section of the archaeological site we are able to identify the anthropogenic contribution to these changes. Thus, the comparison of data from different types of sequences allows emphasizing the anthropogenic contribution to environmental changes and, as a consequence, to distinguish between the natural vegetation changes from the impact of human activity. It is of interest especially for the Late Holocene sediment studies, as for the period when the

  2. Fishing cod in the Baltic Sea - Gambling with the ecosystem services

    Science.gov (United States)

    Björkman, Sven; Nordlöf, Anders

    2014-05-01

    The population of cod in the Baltic sea has over the last decades decreased due to overfishing. To make the students aware of this problem and also to find a solution they are introduced to a game. The purpose of the game is to let the students know how to use renewable natural resources in these aspects; 1 Fishing cod without using it up 2 That solidarity is needed if you are sharing a resource 3 That cooperation is the key to keeping a natural resource healthy. The students are fishermen in group of four and are equipped with a boat. The playing board is a map over the Baltic sea. The rules of the game include the carrying capacity of the sea, how much fish one fishing boat is allowed to pick up, how much it costs to have a boat, and possibilities to buy a bigger boat. The game has two rounds: In round one the students in the group are competing against each other, they are not allowed to talk to each other and they are supposed to get as much fish as they can. As a consequence after round one the sea will become empty. In round two the groups compete with each other and they are coworking within the group. After this round the result is different from the first round. The catches are bigger than in round one and still there are cod left in the sea, which will generate a good fishing in the future.. The discussions after the game can be about why the two rounds ended so different, general discussion about "tragedy of the commons", sustainable use of ecosystem services and discussions about resources in common.

  3. Inherent optical properties of suspended particulate matter in the southern Baltic Sea

    Directory of Open Access Journals (Sweden)

    Joanna Stoń-Egiert

    2011-09-01

    Full Text Available The inherent optical properties (IOPs of suspended particulate matter and their relations with the main biogeochemical characteristics of particles have been examined in the surface waters of the southern Baltic Sea. The empirical data were gathered at over 300 stations in open Baltic Sea waters as well as in the coastal waters of the Gulf of Gdansk. The measurements included IOPs such as the absorption coefficient of particles, absorption coefficient of phytoplankton, scattering and backscattering coefficients of particles, as well as biogeochemical characteristics of suspended matter such as concentrations of suspended particulate matter (SPM, particulate organic matter (POM, particulate organic carbon (POC and chlorophyll a (Chl a. Our data documented the very extensive variability in the study area of particle concentration measures and IOPs (up to two orders of magnitude. Although most of the particle populations encountered were composed primarily of organic matter (av. POM/SPM = ca 0.8, the different particle concentration ratios suggest that the particle composition varied significantly. The relations between the optical properties and biogeochemical parameters of suspended matter were examined. We found significant variability in the constituent-specific IOPs (coefficients of variation (CVs of at least 30% to 40%, usually more than 50%. Simple best-fit relations between any given IOP versus any constituent concentration parameter also highlighted the significant statistical errors involved. As a result, we conclude that for southern Baltic samples an easy yet precise quantification of particle IOPs in terms of the concentration of only one of the following parameters - SPM, POM, POC or Chl a- is not achievable. Nevertheless, we present a set of best statistical formulas for a rough estimate of certain seawater constituent concentrations based on relatively easily measurable values of seawater IOPs. These equations can be implemented in

  4. Sediment-water Nutrient Fluxes in the Gulf of Finland, Baltic Sea

    Science.gov (United States)

    Conley, D. J.; Stockenberg, A.; Carman, R.; Johnstone, R. W.; Rahm, L.; Wulff, F.

    1997-11-01

    High nutrient inputs from the Neva River in the eastern Gulf of Finland, Baltic Sea create steep spatial gradients in water column concentrations of nutrients and of particulates. During July 1993 nutrient fluxes across the sediment-water interface were measured beginning in this eutrophication gradient and extending out into the open waters of the western Gulf. Dissolved oxygen (O2) microgradients showed that O2concentrations were depleted within the first 2-4 mm of the sediment-water interface and calculated O2consumption ranged from -462 to -526 μmol m-2 h-1with no significant differences [analysis of variance (ANOVA);P>0·05] observed between stations. Spatial patterns, however, were evident with significant differences between stations observed in most nutrient fluxes (ANOVA;P0·05) between stations. Estimated denitrification rates from sediments ranged from 6·6-11·5 μmol m-2 h-1and are not particularly intense compared with other Baltic areas, however, given that these rates only include denitrification supported by water column NO-3concentrations and not denitrification coupled to nitrification with the sediments, then they are not so far from the rates (17·8 μmol m-2 h-1) estimated from mass balances in the Gulf of Finland. The sediment-water fluxes reported here include some of the highest rates reported for the Baltic Sea, but are typical of most eutrophic coastal marine environments. The high fluxes reported here contribute to the large reservoir of dissolved inorganic nutrients contained in the water column immediately below the mixed surface layer.

  5. Diatom stratigraphy and long-term dissolved silica concentrations in the Baltic Sea

    Science.gov (United States)

    Olli, Kalle; Clarke, Annemarie; Danielsson, Åsa; Aigars, Juris; Conley, Daniel J.; Tamminen, Timo

    2008-10-01

    In many parts of the world coastal waters with anthropogenic eutrophication have experienced a gradual depletion of dissolved silica (DSi) stocks. This could put pressure on spring bloom diatom populations, e.g. by limiting the intensity of blooms or by causing shifts in species composition. In addition, eutrophication driven enhanced diatom growth is responsible for the redistribution of DSi from the water phase to the sediments, and changes in the growth conditions may be reflected in the sediment diatom stratigraphy. To test for changes in diatom communities we have analyzed four sediment cores from the Baltic Sea covering approximately the last 100 years. The sediment cores originate from the western Gulf of Finland, the Kattegat, the Baltic Proper and the Gulf of Riga. Three out of the four cores reveal only minor changes in composition of diatom assemblages, while the Gulf of Riga core contains major changes, occurring after the second World War. This area is set apart from the other Baltic Sea basins by a high frequency of low after spring bloom DSi concentrations (experiments with cultured T. baltica suggest that intense blooms can potentially exhaust the DSi stock of the water column and exceed the annual Si dissolution in the Gulf of Riga. The phytoplankton time series reveals another exceptional T. baltica bloom period in 1981-1983 (up to 8 mg L - 1 ), which, however, took place before the regular DSi measurements. These periods may be reflected in the conspicuous accumulation of T. baltica frustules in the sediment core corresponding to ca. 1975-1985.

  6. Nuclear emergency preparedness in the Nordic and Baltic Sea countries

    Energy Technology Data Exchange (ETDEWEB)

    Jaworska, A. [Norwegian Radiation Protection Authority (Norway)

    2002-07-01

    Radiation emergency preparedness systems must be able to deal with the threats posed to each country and the region as a whole. The threats from nuclear accidents differ in the various countries of the region. The most serious nuclear threats are those with cross-border implications and are generally assumed to be due to the presence of nuclear reactors of various kinds. Some countries in the region, Finland, Germany, Lithuania, the Russian Federation and Sweden, have nuclear power plants, and several countries in the region possess smaller research reactors. Other nuclear threats arise from nuclear powered naval vessels or submarines, and from nuclear powered satellites. Production, transportation, use, and disposal of radioactive materials constitute potential local nuclear hazards. Finally, terrorist use of radioactive material poses a nuclear threat to all countries. (au)

  7. Nuclear emergency preparedness in the Nordic and Baltic Sea countries

    International Nuclear Information System (INIS)

    Jaworska, A.

    2002-01-01

    Radiation emergency preparedness systems must be able to deal with the threats posed to each country and the region as a whole. The threats from nuclear accidents differ in the various countries of the region. The most serious nuclear threats are those with cross-border implications and are generally assumed to be due to the presence of nuclear reactors of various kinds. Some countries in the region, Finland, Germany, Lithuania, the Russian Federation and Sweden, have nuclear power plants, and several countries in the region possess smaller research reactors. Other nuclear threats arise from nuclear powered naval vessels or submarines, and from nuclear powered satellites. Production, transportation, use, and disposal of radioactive materials constitute potential local nuclear hazards. Finally, terrorist use of radioactive material poses a nuclear threat to all countries. (au)

  8. Falia strategică Marea Neagră – Marea Baltică (The strategic Black SeaBaltic Sea ridge

    Directory of Open Access Journals (Sweden)

    Gheorghe VĂDUVA

    2015-12-01

    Full Text Available There was a moment when it seemed that the East-West dimension of the ontology of Euro-Asian space was beginning to emerge out of its traditional conflicting character and do something in order to bridge the gaps. This would have been excellent, since Western Europe has finance and technology, while Asia is rich in resources. The civilizations to be found on the largest geophysical platform of the Earth are not contradictory and conflicting; they are just different, by area, culture, and interests. Many of the truths that sounded like dogmata or things which were well known and had become chronic were ignored both by the triumphalist and the pessimist analysts. Whatever had happened seemed to be water under the bridge. The Summit of the Eastern Partnership in Vilnius, in the autumn of 2013, showed, however, the real face of things. The undercurrents were revealed, frustrations became evident, the strategic Black SeaBaltic Sea ridge was reactivated and, consequently, the forces, the means, the plans and the resources were re-positioned. The war started again. Actually, it had never stopped because the war between the East and the West is unfortunately a continuous one. Like a road without beginning, without end, and with no exit.

  9. Energy dependency and sustainable regional development in the Baltic states: A review

    Directory of Open Access Journals (Sweden)

    Štreimikienė Dalia

    2016-01-01

    Full Text Available Energy security is one of the most important indicators of sustainable regional development and 'green' growth in implementation of EU strategy Europe 2020. It can provide the harmonized development and cohesion of 'old' and 'new' EU member states. Our paper conducts a comparative study of energy dependency and energy security indicators in the Baltic States. The Baltic countries achieved enormous progress in the use of renewable energy sources and energy efficiency since their EU accession in 2004. The increase of renewable energy capacities in Baltic States also contributed to the reduction of energy intensity and carbon intensity of economy and energy import dependency. Our results show that amongst all three states, it was Estonia that had achieved the best results in increased use of renewables and energy efficiency improvements and had distinguished itself with the best indicators and economic and regional policy outcomes.

  10. Dwarfism of blue mussels in the low saline Baltic Sea — growth to the lower salinity limit

    DEFF Research Database (Denmark)

    Riisgård, Hans Ulrik; Larsen, Poul Scheel; Turja, Raisa

    2014-01-01

    Mussels within the Baltic Mytilus edulis × M. trossulus hybrid zone have adapted to the low salinities in the Baltic Sea which, however, results in slow-growing dwarfed mussels. To get a better understanding of the nature of dwarfism, we studied the ability of M. trossulus to feed and grow at low...... valve closure and respiratory weight loss. A trend line in a plot of all available growth data for both mussel species as a function of salinity indicates that the growth of mussels is steadily hampered by reduced salinities from 30 psu down to about 10 psu, below which the growth is rapidly reduced...... to become negative below 4.5 psu. We suggest that reduced ability to produce shell material at extremely low salinity may explain dwarfism of mussels in the Baltic Sea. Reduced bio-calcification at low salinity, however, may impede shell growth, but not somatic growth, and this may at first result...

  11. Basis for a valuation of the Polish Exclusive Economic Zone of the Baltic Sea: Rationale and quest for tools

    Directory of Open Access Journals (Sweden)

    Jan Marcin Węsławski

    2006-03-01

    Full Text Available This paper summarises current knowledge of goods and servicesin the Polish Exclusive Economic Zone of the Baltic Sea ecosystem.It reviews specific properties of the Baltic that could be usedfor economic valuation. Goods and services range from the familiarresources of fish and minerals, which were valued with the ProductivityMethod, to less obvious services provided by the ecosystem suchas biofiltration in coastal sands, valued with either the ReplacementCost or Damage Cost Avoided methods. Disservices to the marineecosystem are also considered, e.g. erosion and coastal flooding,including the costs of planned mitigating measures. This paperemphasises the importance of using valuation methods to helpmake better-educated decisions for the sustainability of theBaltic Sea.

  12. Active bacterial community structure along vertical redox gradients in Baltic Sea sediment

    Energy Technology Data Exchange (ETDEWEB)

    Jansson, Janet; Edlund, Anna; Hardeman, Fredrik; Jansson, Janet K.; Sjoling, Sara

    2008-05-15

    Community structures of active bacterial populations were investigated along a vertical redox profile in coastal Baltic Sea sediments by terminal-restriction fragment length polymorphism (T-RFLP) and clone library analysis. According to correspondence analysis of T-RFLP results and sequencing of cloned 16S rRNA genes, the microbial community structures at three redox depths (179 mV, -64 mV and -337 mV) differed significantly. The bacterial communities in the community DNA differed from those in bromodeoxyuridine (BrdU)-labeled DNA, indicating that the growing members of the community that incorporated BrdU were not necessarily the most dominant members. The structures of the actively growing bacterial communities were most strongly correlated to organic carbon followed by total nitrogen and redox potentials. Bacterial identification by sequencing of 16S rRNA genes from clones of BrdU-labeled DNA and DNA from reverse transcription PCR (rt-PCR) showed that bacterial taxa involved in nitrogen and sulfur cycling were metabolically active along the redox profiles. Several sequences had low similarities to previously detected sequences indicating that novel lineages of bacteria are present in Baltic Sea sediments. Also, a high number of different 16S rRNA gene sequences representing different phyla were detected at all sampling depths.

  13. Biomass and number of fish impinged at a nuclear power plant by the Baltic Sea.

    Science.gov (United States)

    Bryhn, Andreas C; Bergenius, Mikaela A J; Dimberg, Peter H; Adill, Anders

    2013-12-01

    The main aim of this study was to investigate the number and biomass of impinged fish at Forsmark Nuclear Power Plant in Sweden, located on the coast of the Baltic Sea. Of particular interest was the number of impinged individuals of the critically endangered European eel (Anguilla anguilla) which is regularly caught in the cooling system. Another aim was to determine the comparability of the results from Forsmark and results from impingement studies in other types of waters. Cross-systems studies make it possible to (1) estimate fish loss at plants where fish is not counted, and (2) to predict changes in fish loss from changes in electricity production or cooling water use. In 2010, 31,300,000 fish with a total biomass of 62,600 kg were impinged at Forsmark. In 2011, 27,300,000 fish weighing 38,500 kg were impinged. The maximum peak in total fish number and biomass occurred in spring. The most critical period for herring was in late summer and early autumn. Regarding eel, the largest impingement losses were recorded in November. The number of fish agreed with earlier established quantities of impinged fish in both freshwater and marine ecosystems. The study also estimated that 1,300 critically endangered eels could survive at Forsmark each year if a fish return system would be constructed to allow the passage of fish from the plant back to the Baltic Sea.

  14. Champacyclin, a New Cyclic Octapeptide from Streptomyces Strain C42 Isolated from the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Alexander Pesic

    2013-12-01

    Full Text Available New isolates of Streptomyces champavatii were isolated from marine sediments of the Gotland Deep (Baltic Sea, from the Urania Basin (Eastern Mediterranean, and from the Kiel Bight (Baltic Sea. The isolates produced several oligopeptidic secondary metabolites, including the new octapeptide champacyclin (1a present in all three strains. Herein, we report on the isolation, structure elucidation and determination of the absolute stereochemistry of this isoleucine/leucine (Ile/Leu = Xle rich cyclic octapeptide champacyclin (1a. As 2D nuclear magnetic resonance (NMR spectroscopy could not fully resolve the structure of (1a, additional information on sequence and configuration of stereocenters were obtained by a combination of multi stage mass spectrometry (MSn studies, amino acid analysis, partial hydrolysis and subsequent enantiomer analytics with gas chromatography positive chmical ionization/electron impact mass spectrometry (GC-PCI/EI-MS supported by comparison to reference dipeptides. Proof of the head-to-tail cyclization of (1a was accomplished by solid phase peptide synthesis (SPPS compared to an alternatively side chain cyclized derivative (2. Champacyclin (1a is likely synthesized by a non-ribosomal peptide synthetase (NRPS, because of its high content of (d-amino acids. The compound (1a showed antimicrobial activity against the phytopathogen Erwinia amylovora causing the fire blight disease of certain plants.

  15. Application of a sigma-coordinate baroclinic model to the Baltic Sea

    Directory of Open Access Journals (Sweden)

    Andrzej Jankowski

    2002-03-01

    Full Text Available A three-dimensional (3-D sigma-coordinate baroclinic model is used to investigate water circulation and thermohaline variability in the Baltic Sea. Two versions of the horizontal resolution of ~ 10 km and ~ 5 km with 24 sigma-levels in the vertical are considered. The model is based on the Princeton Ocean Model code of Blumberg & Mellor (1987 and Mellor (1993, known as POM. This paper presents details of simulation strategies and briefly discusses the 'reality' of the results of modelling. The model's capabilities of simulating the characteristic hydrographic features of the Baltic Sea were tested for 3 months (August-October 1995, a simulation related to the period of the PIDCAP'95 experiment (Pilot Study for Intensive Data Collection and Analysis and Precipitation (Isemer 1996. The model results are compared with the in situ measurements of temperature and salinity at selected hydrographic stations, collected during cruises of r/v 'Oceania' in September and October 1995. Comparison of computed and measured temperature and salinity shows that the model reproduces the vertical structure of seawater temperature and salinity in relatively good accordance with the in situ observations. The differences between the calculated and observed values of temperature and salinity are c. 1-2oC and c. 1-2 PSU, depending on the location of the hydrographic station.

  16. Submerged terrestrial landscapes in the Baltic Sea: Evidence from multiproxy analyses of sediment cores from Fehmarnbelt

    Science.gov (United States)

    Enters, Dirk; Wolters, Steffen; Blume, Katharina; Segschneider, Martin; Lücke, Andreas; Theuerkauf, Martin; Hübener, Thomas

    2016-04-01

    Five sediment cores were taken from the southern part of the Fehmarn Belt (Baltic Sea) in the context of an environmental impact study for the intended fixed traverse between Germany and Denmark. The lithologies of the 8m long cores reveal dramatic changes in sedimentary environments which reflect the early Holocene history of the southern Baltic Sea. A succession of terrestrial, semiterrestrial and limnic facies from glacial sediments to peat, lacustrine/estuarine deposits and finally marine sediments document the interplay of eustatic sea level rise and isostatic rebound, which finally lead to the establishment of marine conditions during the Littorina transgression. An age control of the observed changes was established by dating over 50 C-14 samples of different fractions. During the Lateglacial minerogenic varves with thicknesses of several centimeters verify the existence of a proglacial lake in the Fehmarnbelt. Peat development started around 11.250 cal. BP and terminated ca. 10.600 cal. BP which is roughly contemporaneous with the end of the Yoldia Phase in the central Baltic Sea. The oldest peat layers consist of undecomposed sedges and reed. Woody remains of willows appear not before 10.700 cal BP and indicate a stagnant or slowly decreasing water table. This semi-terrestrial phase is followed by a shallow inland lake which existed until the Littorina transgression around 8.300 cal. BP. Initially the lacustrine sediments exhibit high C/N ratios, low low δ13Corg values and contain numerous wood fragments as well as other botanical macro remains. This indicates shallow conditions close to the lake shore. Later, the occurrence of planktonic diatom species such as Aulacoseira ambigua suggest greater water depths. We did not find any indications of the often postulated catastrophic outburst of the Ancylus Lake via Fehmarnbelt and the Great Belt into the North Sea. Likewise, XRF scanning does not show conspicuous peaks in Ti or K which would have been

  17. Coming of age: - Do female harbour porpoises (Phocoena phocoena from the North Sea and Baltic Sea have sufficient time to reproduce in a human influenced environment?

    Directory of Open Access Journals (Sweden)

    Tina Kesselring

    Full Text Available The harbour porpoise is the only cetacean species native to German waters. Since human pressures are suggested to shorten their reproductive lifespan, basic knowledge on reproduction is strongly required. One parameter is the onset of sexual maturity in female harbour porpoises. Therefore, we investigated the first signs of sexual maturity for a period of almost two decades (1990-2016. Ovaries from 111 female harbour porpoises from the German North Sea and Baltic Sea were examined for the presence and morphological structure of follicles, corpora lutea and corpora albicantia. Based on the ovarian characteristics we performed the first model-based estimation of age at sexual maturity for harbour porpoises from German waters. Additionally, we produced a demographical age structure based on all female strandings and bycatches from German coasts. Our results showed that corpora lutea and corpora albicantia as signs of former ovulation could be found in individuals at an age of 4.95 (± 0.6 years. No significant differences between specimens from the North Sea and Baltic Sea were detected. However, the average age at death differed significantly with 5.70 (± 0.27 years for North Sea animals and 3.67 (± 0.30 years for those in the Baltic Sea. Growing evidence exists that the shortened lifespan of Baltic Sea harbour porpoises is linked to an anthropogenically influenced environment with rising bycatch mortalities due to local gillnet fisheries. Thus, our findings support the idea of local management plans based on a model-based detection of age at sexual maturity and considering the anthropogenic impacts on the population for effective protection of harbour porpoises and the North Sea and Baltic Sea.

  18. How Changing Human Lifestyles are Shaping Europe's Regional Seas

    Science.gov (United States)

    Mee, L. D.; Lowe, C. D.; Langmead, O.; McQuatters-Gollop, A.; Attrill, M.; Cooper, P.; Gilbert, A.; Knudsen, S.; Garnacho, E.

    2007-05-01

    European society is experiencing unprecedented changes triggered by expansion of the European Union, the fall of Communism, economic growth and the onset of globalisation. Europe's regional seas, the Baltic, Black Sea, Mediterranean and North-East Atlantic (including the North Sea), provide key goods and services to the human population but have suffered from severe degradation in past decades. Their integrity as coupled social and ecological systems depends on how humanity will anticipate potential problems and deal with its ecological footprint in the future. We report the outcome of an EU-funded 15-country, 28 institution project entitled European Lifestyles and Marine Ecosystems (ELME). Our studies were designed to inform new EU policy and legislation that incorporates Ecosystem-Based Management. ELME has modelled the key relationships between economic and social drivers (D), environmental pressures (P) and changes in the state of the environment (S) in Europe's regional seas. We examined four key issues in each sea: habitat change, eutrophication, chemical pollution and fisheries. We developed conceptual models for each regional sea and employed a novel stochastic modelling technique to examine the interrelationship between key components of the conceptual models. We used the models to examine 2-3 decade projections of current trends in D, P and S and how a number of alternative development scenarios might modify these trends. These simulations demonstrate the vulnerability of Europe's seas to human pressure. As affluence increases in countries acceding to the EU, so does the demand for marine goods and services. There are `winners' and `losers' amongst marine species; the winners are often species that are opportunistic invaders or those with low economic value. In the case of eutrophication, semi-enclosed seas such as the Baltic or Black Sea are already affected by the `legacy of the past'; nutrients that have accumulated in soils, ground waters and

  19. The importance of colloids and mires for the transport of uranium isotopes through the Kalix River watershed and Baltic Sea

    International Nuclear Information System (INIS)

    Porcelli, D.; Wasserburg, G.J.; Andersson, P.S.

    1997-01-01

    The importance of colloids and organic deposits for the transport of uranium isotopes from continental source regions and through the estuarine environment was investigated in the mire-rich Kalix River drainage basin in northern Sweden and the Baltic Sea. Ultrafiltration techniques were used to separate uranium and other elements associated with colloids > 10 kD and >3 kD from open-quotes soluteclose quotes uranium and provided consistent results and high recovery rates for uranium as well as for other elements from large volume samples. Uranium concentrations in 0.45 μm-filtered Kalix River water samples increased by a factor of 3 from near the headwaters in the Caledonides to the river mouth while major cation concentrations were relatively constant. 234 U 238 U ratios were high (δ 234 U = 770-1500) throughout the basin, without showing any simple pattern, and required a supply of 234 U-rich water. Throughout the Kalix River, a large fraction (30-90%) of the uranium is carried by >10 kD colloids, which is compatible with uranium complexation with humic acids. No isotopic differences were found between colloid-associated and solute uranium. Within the Baltic Sea, about half of the uranium is removed at low salinities. The proportion that is lost is equivalent to that of river-derived colloid-bound uranium, suggesting that while solute uranium behaves conservatively during estuarine mixing, colloid-bound uranium is lost due to rapid flocculation of colloidal material. The association of uranium with colloids therefore may be an important parameter in determining uranium estuarine behavior. Mire peats in the Kalix River highly concentrate uranium and are potentially a significant source of recoil 234 U to the mirewaters and river waters. However, mirewater data clearly demonstrate that only small 234 U/ 238 U shifts are generated relative to inflowing groundwater. 63 refs., 8 figs., 3 tabs. groundwater. 63 refs., 8 figs., 3 tabs

  20. Long-term stability and effective population size in North Sea and Baltic Sea cod ( Gadus morhua )

    DEFF Research Database (Denmark)

    Poulsen, Nina Aagaard; Eg Nielsen, Einar; Schierup, M.H.

    2006-01-01

    for the Moray Firth population, while subtle but significant genetic changes over time were detected for the Bornholm Basin population. Estimates of the effective population size (N-e) generally exceeded 500 for both populations when employing a number of varieties of the temporal genetic method. However......DNA from archived otoliths was used to explore the temporal stability of the genetic composition of two cod populations, the Moray Firth (North Sea) sampled in 1965 and 2002, and the Bornholm Basin (Baltic Sea) sampled in 1928 and 1997. We found no significant changes in the allele frequencies......, confidence intervals were very wide and N-e's most likely range in the thousands. There was no apparent loss of genetic variability and no evidence of a genetic bottleneck for either of the populations. Calculations of the expected levels of genetic variability under different scenarios of N-e showed...

  1. A novel modeling tool with multi-stressor functionality for organic contaminant transport and fate in the Baltic Sea

    Energy Technology Data Exchange (ETDEWEB)

    Undeman, E., E-mail: emma.undeman@itm.su.se [Baltic Nest Institute, Baltic Sea Centre, Stockholm University, 10691 Stockholm (Sweden); Department of Applied Environmental Science, Stockholm University, 11418 Stockholm (Sweden); Gustafsson, E., E-mail: erik.gustafsson@su.se [Baltic Nest Institute, Baltic Sea Centre, Stockholm University, 10691 Stockholm (Sweden); Gustafsson, B.G., E-mail: bo.gustafsson@su.se [Baltic Nest Institute, Baltic Sea Centre, Stockholm University, 10691 Stockholm (Sweden)

    2014-11-01

    The coupled physical–biogeochemical model BALTSEM, previously used to assess nutrient/carbon cycles and eutrophication in the Baltic Sea, has been expanded to include algorithms for calculations of organic contaminant environmental transport and fate. This novel model version (BALTSEM-POP) is evaluated for polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) and hexachlorobenzene (HCB) in Baltic Sea surface water and sediment. Modeled dissolved concentrations are usually within a factor of 2–4 of observed concentrations, however with larger deviations for furans. Calculated concentrations in particulate organic matter are less accurate (within factors of 1–700), likely due to errors in estimated pelagic biomass, particulate matter–water partitioning, and large natural variability in field data. Concentrations in sediments are usually predicted within a factor of 6. The good performance of the model illustrates its usefulness for exploration of contaminant fate in response to variations in nutrient input and climatic conditions in the Baltic Sea marine environment. - Highlights: • A new model for organic chemical transport and fate in the Baltic Sea is presented. • Physical and biogeochemical processes are linked to organic contaminant transport. • The model is evaluated for PCBs, HCB and PCDD/Fs. • The model can predict dissolved concentrations within a factor of ca 2–4. • Predictions for concentrations in particulate matter and sediment are less accurate.

  2. TBT and its metabolites in sediments: Survey at a German coastal site and the central Baltic Sea.

    Science.gov (United States)

    Abraham, Marion; Westphal, Lina; Hand, Ines; Lerz, Astrid; Jeschek, Jenny; Bunke, Dennis; Leipe, Thomas; Schulz-Bull, Detlef

    2017-08-15

    Since the 1950s the organotin compound tributyltin (TBT) was intensively used in antifouling paints for marine vessels and it became of concern for the marine environment. Herein, we report on a study from 2015 on TBT and its metabolites monobutyltin (MBT) and dibutyltin (DBT) in sediments from the central Baltic Sea and a Baltic Sea coastal site with strong harbor activities (Warnemünde). Sublayers from a sediment core from the Arkona Basin were analyzed to investigate the long term organotin pressure for the Baltic Sea. For the central Baltic Sea total organotin (MBT+DBT+TBT) ranged from 100 to 500ng/g TOC with distinct areas of high organotin content probably due to historical inputs. For the coastal site total organotin ranged from 10,000 to 60,000ng/g TOC. MBT and DBT were the predominant organotin species detected. Overall, the data obtained indicate the progress of TBT degradation at the investigated sites. Copyright © 2017 Elsevier Ltd. All rights reserved.

  3. Phenology of cryptomonads and the CRY1 lineage in a coastal brackish lagoon (Vistula Lagoon, Baltic Sea)

    Czech Academy of Sciences Publication Activity Database

    Piwosz, Kasia; Kownacka, J.; Ameryk, A.; Zalewski, M.; Pernthalter, J.

    2016-01-01

    Roč. 52, č. 4 (2016), s. 626-637 ISSN 0022-3646 R&D Projects: GA ČR GA13-11281S Institutional support: RVO:61388971 Keywords : Baltic Sea * chromalveolate hypothesis * coastal waters Subject RIV: EE - Microbiology, Virology Impact factor: 2.608, year: 2016

  4. Salinity change in the Baltic Sea during the last 8,500 years: evidence, causes and models

    Energy Technology Data Exchange (ETDEWEB)

    Westman, Per; Wastegaard, Stefan; Schoning, Kristian [Stockholm Univ. (Sweden). Dept. of Quaternary Research; Gustafsson, Bo [Oceanus Havsundersoekningar, Goeteborg (Sweden); Omstedt, Anders [SMHI, Norrkoeping (Sweden)

    1999-12-01

    The salinity influences which ecosystems will dominate in the coastal area and what property radionuclides have. Salinity is also an important boundary condition for the transport models in the geosphere. Knowledge about the past salinity is important background to evaluate the hydrology and geochemistry in the rock and further to assess the radiological consequences of possible releases from a radioactive repository. This report concerns the salinity in the Baltic Sea during the last 8500 calendar years BP. Shore-level data for the inlet areas and proxy (indirect) data for the palaeo-salinity and the climate are reviewed. These data is further used in a steady-state model for the salt exchange between the Baltic Sea and Kattegat. This will then be extended to a model of the future development of the salinity in the Baltic Sea. We conclude that the changes in the inlet cross-section areas together with a 15% to 60% lower net freshwater input compared to the present input can explain the higher salinity in the Baltic Sea during earlier times.

  5. Iron and manganese shuttles control the formation of authigenic phosphorus minerals in the euxinic basins of the Baltic Sea

    NARCIS (Netherlands)

    Jilbert, T.|info:eu-repo/dai/nl/304835714; Slomp, C.P.|info:eu-repo/dai/nl/159424003

    2013-01-01

    Microanalysis of epoxy resin-embedded sediments is used to demonstrate the presence of authigenic iron (Fe) (II) phosphates and manganese (Mn)-calcium (Ca)-carbonate-phosphates in the deep euxinic basins of the Baltic Sea. These minerals constitute major burial phases of phosphorus (P) in this area,

  6. Emergence of a new rhabdovirus associated with mass mortalities in eelpout (Zoarces viviparous) in the Baltic Sea

    DEFF Research Database (Denmark)

    Axen, C.; Hakhverdyan, M.; Boutrup, Torsten Snogdal

    2017-01-01

    We report the first description of a new Rhabdoviridae tentatively named eelpout rhabdovirus (EpRV genus Perhabdovirus). This virus was associated with mass mortalities in eelpout (Zoarces viviparous, Linnaeus) along the Swedish Baltic Sea coast line in 2014. Diseased fish showed signs of central...

  7. A novel modeling tool with multi-stressor functionality for organic contaminant transport and fate in the Baltic Sea

    International Nuclear Information System (INIS)

    Undeman, E.; Gustafsson, E.; Gustafsson, B.G.

    2014-01-01

    The coupled physical–biogeochemical model BALTSEM, previously used to assess nutrient/carbon cycles and eutrophication in the Baltic Sea, has been expanded to include algorithms for calculations of organic contaminant environmental transport and fate. This novel model version (BALTSEM-POP) is evaluated for polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) and hexachlorobenzene (HCB) in Baltic Sea surface water and sediment. Modeled dissolved concentrations are usually within a factor of 2–4 of observed concentrations, however with larger deviations for furans. Calculated concentrations in particulate organic matter are less accurate (within factors of 1–700), likely due to errors in estimated pelagic biomass, particulate matter–water partitioning, and large natural variability in field data. Concentrations in sediments are usually predicted within a factor of 6. The good performance of the model illustrates its usefulness for exploration of contaminant fate in response to variations in nutrient input and climatic conditions in the Baltic Sea marine environment. - Highlights: • A new model for organic chemical transport and fate in the Baltic Sea is presented. • Physical and biogeochemical processes are linked to organic contaminant transport. • The model is evaluated for PCBs, HCB and PCDD/Fs. • The model can predict dissolved concentrations within a factor of ca 2–4. • Predictions for concentrations in particulate matter and sediment are less accurate

  8. Salinity change in the Baltic Sea during the last 8,500 years: evidence, causes and models

    International Nuclear Information System (INIS)

    Westman, Per; Wastegaard, Stefan; Schoning, Kristian; Omstedt, Anders

    1999-12-01

    The salinity influences which ecosystems will dominate in the coastal area and what property radionuclides have. Salinity is also an important boundary condition for the transport models in the geosphere. Knowledge about the past salinity is important background to evaluate the hydrology and geochemistry in the rock and further to assess the radiological consequences of possible releases from a radioactive repository. This report concerns the salinity in the Baltic Sea during the last 8500 calendar years BP. Shore-level data for the inlet areas and proxy (indirect) data for the palaeo-salinity and the climate are reviewed. These data is further used in a steady-state model for the salt exchange between the Baltic Sea and Kattegat. This will then be extended to a model of the future development of the salinity in the Baltic Sea. We conclude that the changes in the inlet cross-section areas together with a 15% to 60% lower net freshwater input compared to the present input can explain the higher salinity in the Baltic Sea during earlier times

  9. Migration of 90Sr in the cooling basin of the Ignalina atomic power plant and the Baltic sea ecosystems

    International Nuclear Information System (INIS)

    Dushauskiene-Duzh, R.

    1992-01-01

    On the basis of a long-time radiation monitoring of the Ignalina APP and the Baltic sea ecosystems determined regularities of the 90 Sr distribution in the main components of the ecosystems (water, bottom sediments, biota). It was established that 90 Sr accumulation coefficient in the aquatic plants of the warmed up water zone of the Ignalina APP is 2.6 lower than that of the stable water suction zone. The accumulation of 90 Sr in molluscs is higher in the warmed up water zone than in the stable water zone. It was determined that the mean concentration of 90 Sr in surface water of near-shore areas of the Baltic sea are higher than that in the open Baltic. Concentration of the 90 Sr in the biota in the Baltic sea is about 300-500 times higher than in the water. The accumulation level of 90 Sr in zoobenthos varies in different species being in organs and tissues of fishes consuming actively calcium for building up their skeletons. 90 Sr levels in bottom sediments of bays are higher than those in sediments of the open sea. Accumulation of 90 Sr in muds is about 11 times higher than in sands. (author). 5 figs., 3 refs

  10. Fecundity regulation in relation to habitat utilisation of two sympatric flounder (Platichtys flesus) populations in the brackish water Baltic Sea

    DEFF Research Database (Denmark)

    Nissling, Anders; Thorsen, Anders; da Silva, Filipa F.G.

    2015-01-01

    Two populations of flounder (Platichtys flesus) with different life history traits inhabit the brackish water Baltic Sea. Both types share feeding areas in coastal waters during summer-autumn but utilise different habitats for spawning in spring, namely offshore spawning with pelagic eggs and coa...

  11. Equilibrium passive sampling as a tool to study polycyclic aromatic hydrocarbons in Baltic Sea sediment pore-water systems

    DEFF Research Database (Denmark)

    Lang, Susann-Cathrin; Hursthouse, Andrew; Mayer, Philipp

    2015-01-01

    Solid Phase Microextraction (SPME) was applied to provide the first large scale dataset of freely dissolved concentrations for 9 polycyclic aromatic hydrocarbons (PAHs) in Baltic Sea sediment cores. Polydimethylsiloxane (PDMS) coated glass fibers were used for ex-situ equilibrium sampling followed...

  12. Links between biota and climate-related variables in the Baltic region using Lake Onega as an example

    Directory of Open Access Journals (Sweden)

    Andrey N. Sharov

    2014-03-01

    Full Text Available This paper aims to reveal current changes (recent decades in regional climatic variables like water temperature (WT, the duration of the ice-free period (ICE-FREE and the precipitation rate (P, as exemplified by Petrozavodsk Bay (Lake Onega, European Russia, and to analyse their relationships with the global climatic indices NAO, AO and structural characteristics of biota (chlorophyll a concentration (Chl a, phytoplankton and zoobenthos abundance/biomass in the lake ecosystem, which lies within the Baltic Sea catchment area. Spearman's rank correlations yielded significant (p R = 0.66; p = 0.03 with WT and negatively with ICE-FREE (R = -0.53; p = 0.05. At the same time, multiple regression analysis confirmed that the global climate governs primarily the regional climatic variables and productivity level in the lake's ecosystem, whereas most of the biotic characteristics respond to variability in the regional climate.

  13. Characterizing and predicting the distribution of Baltic Sea flounder (Platichthys flesus) during the spawning season

    Science.gov (United States)

    Orio, Alessandro; Bergström, Ulf; Casini, Michele; Erlandsson, Mårten; Eschbaum, Redik; Hüssy, Karin; Lehmann, Andreas; Ložys, Linas; Ustups, Didzis; Florin, Ann-Britt

    2017-08-01

    Identification of essential fish habitats (EFH), such as spawning habitats, is important for nature conservation, sustainable fisheries management and marine spatial planning. Two sympatric flounder (Platichthys flesus) ecotypes are present in the Baltic Sea, pelagic and demersal spawning flounder, both displaying ecological and physiological adaptations to the low-salinity environment of this young inland sea. In this study we have addressed three main research questions: 1) What environmental conditions characterize the spatial distribution and abundance of adult flounder during the spawning season? 2) What are the main factors defining the habitats of the two flounder ecotypes during the spawning season? 3) Where are the potential spawning areas of flounder? We modelled catch per unit of effort (CPUE) of flounder from gillnet surveys conducted over the southern and central Baltic Sea in the spring of 2014 and 2015 using generalized additive models. A general model included all the stations fished during the survey while two other models, one for the demersal and one for the pelagic spawning flounder, included only the stations where each flounder ecotype should dominate. The general model captured distinct ecotype-specific signals as it identified dual salinity and water depth responses. The model for the demersal spawning flounder revealed a negative relation with the abundance of round goby (Neogobius melanostomus) and a positive relation with Secchi depth and cod abundance. Vegetation and substrate did not play an important role in the choice of habitat for the demersal ecotype. The model for the pelagic spawning flounder showed a negative relation with temperature and bottom current and a positive relation with salinity. Spatial predictions of potential spawning areas of flounder showed a decrease in habitat availability for the pelagic spawning flounder over the last 20 years in the central part of the Baltic Sea, which may explain part of the observed

  14. Development of interdisciplinary model of microplastics transport and transformation in the Baltic sea

    Science.gov (United States)

    Bagaev, Andrei; Chubarenko, Irina; Mizyuk, Artem; Zobkov, Mikhail; Esiukova, Elena; Isachenko, Igor; Stepanova, Natalya

    2016-04-01

    Nowadays, anthropogenic pressure from the coastal areas comes up in many aspects of marine environment changes, decreasing the aesthetics of the underwater world, threatening the sustainability of marine ecosystems and influencing the quality of human life. Microplastics are pervasive throughout the marine environment, are ingested by many marine organisms, and enter a food chain that includes humans. A certain fraction of microplastics in marine environment results from breakdown of larger items in numerous tiny fragments due to mechanical forces and photochemical processes, as well as from other degradation sources. Microplastics can absorb high levels of Persistent Organic Pollutants (POPs) and other toxins. Deep-sea sediments are a likely, but yet unquantified, sink for microplastics (Cole et al., 2011). Since the MARBLE ('MicroplAstics Research in the BaLtic Environment') project started, three expeditions and multiple on-shore field experiments have been conducted in the South-Eastern Baltic. The samples were collected from the surface, deep water layers and bottom sediments. The samples were processed and physical parameters of the microparticles were established. In parallel, laboratory experiments under controllable conditions over the particles of regular shapes were conducted in order to test the empirical formulas for the sinking velocity. PLEX ('PLastics EXplorer') -- a device for efficiently collecting microparticles in marine environment -- was developed, built and tested. An attempt was made to quantify some geometrical properties of particles, to compare their surface areas, fouling rates, sinking velocities, and finally provide some estimates for the main spatial and temporal scales, describing the behaviour of the particles of different densities and shapes in the Baltic Sea (Chubarenko et al., 2016). An original 3D model of Microplastics dynamics is under development now. Its aim is to provide a robust numerical predictive tool to study pathways

  15. Use of regional climate models data for groundwater recharge modelling in Baltic artesian basin

    Science.gov (United States)

    Timuhins, A.; Klints, I.; Sennikovs, J.; Virbulis, J.

    2012-04-01

    Baltic artesian basin (BAB) covers about 480000 square kilometres. BAB includes territory of Latvia, Lithuania, Estonia, parts of Poland, Russia, Belarus and Baltic Sea. The closed hydrogeological mathematical model for the BAB is developed in University of Latvia and reference calculations made in steady state mode. No-flow boundary condition is applied on the bottom and side boundaries of BAB. Hydraulic head is fixed on the seabed and largest lakes, and along the main river lines. Main water supply wells also are presented in the model as a pointwise water extraction. Precipitation is the main source of the groundwater recharge in the BAB region. Infiltration parameterization is responsible for this water source in BAB model. During the early stage of calibration of BAB hydrogeological model an automatic calibration for the hydraulic conductivities of permeable layers and single infiltration rate was attempted. Performing BAB model calibration it was noted that the differences of calculated and observed hydraulic heads (used for calculating the calibration penalty function) can be reduced by introducing a spatially distributed infiltration model. The aim of the present study is improving of the infiltration model, as well as preserving a short computation time (several minutes) for the piezometric head. Direct solution of improvement of the infiltration would be a usage of the advanced hydrological models. However, an accurate hydrological model requires a lot of computational power. It should couple meteorological and hydrological parameters and requires additional calibration. The regional climate model (KNMI-RACMO2 25 km resolution) results from ENSEMBLES project are used for the spatially distributed infiltration field calculation. The infiltration field is constructed as weighted difference of 30 year averaged precipitation and evaporation fields. The weight value is calibrated and a considerable decrease of the value of penalty function of the groundwater

  16. [The Baltic countries as the birthplace of embryology. Contingencies of a transnational region of science].

    Science.gov (United States)

    Riha, Ortrun; Schmuck, Thomas

    2010-01-01

    Modern embryology is grounded on the research of Pander (theory of germ-layers), von Baer (human egg) and Rathke (branchial arches in mammals). All these scientists lived and worked in the Baltic region. They held professorships at the universities of Koenigsberg and Dorpat and at the Imperial Academy of St. Petersburg, thus moving between the Kingdom of Prussia and the Russian Czardom. Since the Baltic countries are not commonly considered to be predestined as a birthplace of embryology, special attention is turned to the coincidences that, there of all places, made those people focus on that special field of research. Considering the peripheral position of the Baltic, the paper examines personal relations, national identities, cultural exchange, and local working conditions, including room for development as well as formidable obstacles.

  17. Marine environment protection of the North Sea and Baltic Sea. Special report - February 2004; Meeresumweltschutz fuer Nord- und Ostsee. Sondergutachten - Februar 2004

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    The marine environment of the North Sea and Baltic Sea is still heavily polluted. The marine ecosystems are under severe stress from overfishing, water pollution, raw materials production and tourism. Environmental protection in this region necessitates decisive political initiatives and strict corrections especially in fishery policy, agricultural policy and chemical substances control. This is the balance of the special expert opinion of the Council of Environmental Experts. The publication specifies the main problem areas, the current pollution situation, the fields where action is most urgently required - especially in fishery, chemical substances, agricultural and sea travel policies - and presents suggestions for an integrated European and national marine protection policy including a regional development concept for the marine environment. (orig.) [German] Die Meeresumwelt von Nord- und Ostsee ist nach wie vor stark belastet. Ueberfischung, Schadstoffeintraege und Ueberduengung sowie die intensive Nutzung durch Schifffahrt, Rohstoffabbau und Tourismus beeintraechtigen vielfach massiv die marinen Oekosysteme. Ein wirksamer Meeresumweltschutz erfordert daher einschneidende politische Initiativen und grundlegende Korrekturen insbesondere in der Fischereipolitik, der Agrarpolitik und bei der Chemikalienregulierung. Diese Bilanz zieht der Rat von Sachverstaendigen fuer Umweltfragen in seinem aktuellen Sondergutachten 'Meeresumweltschutz fuer Nord- und Ostsee'. Das Sondergutachen - gibt einen Ueberblick ueber die wichtigsten Problemfelder und die aktuelle Belastungslage, - zeigt den wesentlichen Handlungsbedarf auf, insbesondere fuer die Fischerei-, Chemikalien-, Agrar- und Schifffahrtspolitik und - entwickelt Vorschlaege fuer eine integrierte europaeische und nationale Meeresschutzpolitik einschliesslich einer Merresraumordnung. (orig.)

  18. The significance of nitrogen fixation to new production during early summer in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    U. Ohlendieck

    2007-01-01

    Full Text Available Rates of dinitrogen (N2 fixation and primary production were measured during two 9 day transect cruises in the Baltic proper in June–July of 1998 and 1999. Assuming that the early phase of the bloom of cyanobacteria lasted a month, total rates of N2 fixation contributed 15 mmol N m−2 (1998 and 33 mmol N m−2 (1999 to new production (sensu Dugdale and Goering, 1967. This constitutes 12–26% more new N than other annual estimates (mid July–mid October from the same region. The between-station variability observed in both total N2 fixation and primary productivity greatly emphasizes the need for multiple stations and seasonal sampling strategies in biogeochemical studies of the Baltic Sea. The majority of new N from N2 fixation was contributed by filamentous cyanobacteria. On average, cyanobacterial cells >20 µm were able to supply a major part of their N requirements for growth by N2 fixation in both 1998 (73% and 1999 (81%. The between-station variability was high however, and ranged from 28–150% of N needed to meet the rate of C incorporation by primary production. The molar C:N rate incorporation ratio (C:NRATE in filamentous cyanobacterial cells was variable (range 7–28 and the average almost twice as high as the Redfield ratio (6.6 in both years. Since the molar C:N mass ratio (C:NMASS in filamentous cyanobacterial cells was generally lower than C:NRATE at a number of stations, we suggest that the diazotrophs incorporated excess C on a short term basis (carbohydrate ballasting and buoyancy regulation, released nitrogen or utilized other regenerated sources of N nutrients. Measured rates of total N2 fixation contributed only a minor fraction of 13% (range 4–24 in 1998 and 18% (range 2–45 in 1999 to the amount of N needed for the community primary production. An average of 9 and 15% of total N2 fixation was found in cells <5 µm. Since cells <5 µm did not show any detectable rates of N2 fixation, the 15N-enrichment could be

  19. Russia-EU energy efficiency cooperation in the Baltic region: the untapped potential

    Directory of Open Access Journals (Sweden)

    Romanova T. A.

    2014-03-01

    Full Text Available A stereotypical understanding of EU-Russia energy relations is often reduced to trade in oil and natural gas, which downplays the importance of energy efficiency cooperation. Such cooperation is promoted within the Energy Charter and its Treaty, Partnership and Cooperation Agreement, Energy Dialogue, Common Economic Space, Partnership for Modernisation. However, it lacks practical development, which relates to the instability of the legal environment in Russia, insufficient mechanisms of financial support for energy conservation projects and poor political support. Nevertheless, energy efficiency cooperation is capable of changing Russia-EU energy cooperation qualitatively: it offers a cheaper way to meet the needs of the EU, redefines interdependence between the parties, and introduces new elements of equality between them. Energy efficiency cooperation also transforms the patterns of the EU-Russia legal harmonization, creates new conditions for the convergence of regulations and the development of the middle class in Russia. Due to its specific features, cooperation in the Baltic Sea region becomes a locomotive of the Russia-EU energy efficiency cooperation, and, as a result, is capable of changing the quality of relations between the partners.

  20. The radiological exposure of man from ingestion of Cs-137 and Sr-90 in seafood from the Baltic Sea. Pilot project: Marina-Balt

    International Nuclear Information System (INIS)

    Nielsen, S.P.; Oehlenschlaeger, M.; Karlberg, O.

    1995-04-01

    This report describes a limited radiological assessment of the collective doses to man from the intake of seafood from the Baltic Sea contaminated with the radionuclides Cs-137 and Sr-90. Information on fisheries statistics is presented. The most important source terms to radioactive contamination of Cs-137 and Sr-90 in the Baltic Sea are identified and quantified. A compartment model for the dispersion of radionuclides in European coastal waters including the Baltic Sea is described and tested by comparing model predictions with observations. Collective doses are calculated with the model for each of the source-term categories. (au) (11 tabs., 28 ills., 17 refs.)

  1. Reorganization of a large marine ecosystem due to atmospheric and anthropogenic pressure: a discontinuous regime shift in the Central Baltic Sea

    DEFF Research Database (Denmark)

    Moellmann, C; Diekmann, Rabea; Muller-Karulis, B

    2009-01-01

    Marine ecosystems such as the Baltic Sea are currently under strong atmospheric and anthropogenic pressure. Besides natural and human-induced changes in climate, major anthropogenic drivers such as overfishing and anthropogenic eutrophication are significantly affecting ecosystem structure...... the Baltic Sea, the largest brackish water body in the world ocean, and its ecosystems are strongly affected by atmospheric and anthropogenic drivers. Here, we present results of an analysis of the state and development of the Central Baltic Sea ecosystem integrating hydroclimatic, nutrient, phyto...... to atmospherically induced environmental change by reducing the anthropogenic impact....

  2. Seasonal signatures in SFG vibrational spectra of the sea surface nanolayer at Boknis Eck Time Series Station (SW Baltic Sea)

    Science.gov (United States)

    Laß, K.; Bange, H. W.; Friedrichs, G.

    2013-08-01

    The very thin sea surface nanolayer on top of the sea surface microlayer, sometimes just one monomolecular layer thick, forms the interface between ocean and atmosphere. Due to the small dimension and tiny amount of substance, knowledge about the development of the layer in the course of the year is scarce. In this work, the sea surface nanolayer at Boknis Eck Time Series Station (BE), southwestern Baltic Sea, has been investigated over a period of three and a half years. Surface water samples were taken monthly by screen sampling and were analyzed in terms of organic content and composition by sum frequency generation spectroscopy, which is specifically sensitive to interfacial layers. A yearly periodicity has been observed with a pronounced abundance of sea surface nanolayer material (such as carbohydrate-rich material) during the summer months. On the basis of our results we conclude that the abundance of organic material in the nanolayer at Boknis Eck is not directly related to phytoplankton abundance alone. We speculate that indeed sloppy feeding of zooplankton together with photochemical and/or microbial processing of organic precursor compounds is responsible for the pronounced seasonality.

  3. Simulation of nitrate reduction in groundwater - An upscaling approach from small catchments to the Baltic Sea basin

    Science.gov (United States)

    Hansen, A. L.; Donnelly, C.; Refsgaard, J. C.; Karlsson, I. B.

    2018-01-01

    This paper describes a modeling approach proposed to simulate the impact of local-scale, spatially targeted N-mitigation measures for the Baltic Sea Basin. Spatially targeted N-regulations aim at exploiting the considerable spatial differences in the natural N-reduction taking place in groundwater and surface water. While such measures can be simulated using local-scale physically-based catchment models, use of such detailed models for the 1.8 million km2 Baltic Sea basin is not feasible due to constraints on input data and computing power. Large-scale models that are able to simulate the Baltic Sea basin, on the other hand, do not have adequate spatial resolution to simulate some of the field-scale measures. Our methodology combines knowledge and results from two local-scale physically-based MIKE SHE catchment models, the large-scale and more conceptual E-HYPE model, and auxiliary data in order to enable E-HYPE to simulate how spatially targeted regulation of agricultural practices may affect N-loads to the Baltic Sea. We conclude that the use of E-HYPE with this upscaling methodology enables the simulation of the impact on N-loads of applying a spatially targeted regulation at the Baltic Sea basin scale to the correct order-of-magnitude. The E-HYPE model together with the upscaling methodology therefore provides a sound basis for large-scale policy analysis; however, we do not expect it to be sufficiently accurate to be useful for the detailed design of local-scale measures.

  4. Application of Radioactive and Stable Isotopes to Trace Anthropogenic Pollution in the Baltic Sea

    International Nuclear Information System (INIS)

    Lujaniene, G.; Valiulis, D.; Remeikaitė-Nikienė, N.; Barisevičiūtė, R.; Stankevičius, A.; Kulakauskaitė, I.; Mažeika, J.; Petrošius, R.; Jokšas, K.; Li, H.-C.; Garnaga, G.; Povinec, P.

    2015-01-01

    The Baltic Sea is one of the seas most contaminated by various pollutants including the chemical munitions dumped after the Second World War. Pu isotopes, Δ 14 C and δ 13 C of total organic carbon (TOC) as well as lipid and phospholipids (PL) fractions of the sediments were applied to study sources of pollutants including chemical warfare agents (CWA). The compound-specific δ 13 C analysis, PL–derived fatty acid biomarkers and an end-member mixing model were used to estimate a relative contribution of the marine, terrestrial and fossil as well as petroleum hydrocarbons (measured directly) sources to organic carbon in the sediments, to assess a possible effect of petroleum hydrocarbon contamination on radiocarbon signatures and to elucidate a possible leakage of CWA at the Gotland Deep dumpsite. Data on spatial distribution of As, Zn, Ni, Cr, Hg, Cd, Cu and Pb concentrations as well as 206 Pb/ 207 Pb and 208 Pb/ 207 Pb ratios in the surface sediments indicated the highest concentrations of Pb with their different pattern of distribution and insignificant variations of 206 Pb/ 207 Pb and 208 Pb/ 207 Pb ratios. The obtained data revealed the possible application of the Chernobyl-derived Pu to trace the pollutants of the terrestrial origin. Wide TOC variations with the strong impact of the terrestrial and fresh waters in the coastal areas were observed. Variations of Δ 14 C and δ 13 C values with the most depleted values of the Δ 14 C TOC (-453%) and Δ 14 C of total lipid extracts (-812.4%) at the CWA dumpsite were found. An excess (after subtracting the petroleum hydrocarbon) of fossil sources at the CWA dumpsite as compared to those at other stations in the Baltic Sea was detected. The obtained results indicated a possible effect of CWA on depleted Δ 14 C and δ 13 C values. This study was supported by the Research Council of Lithuania, contract No. MIP-080/2012. (author)

  5. Sealworm (Pseudoterranova decipiens) infection in grey seals (Halichoerus grypus), cod (Gadus morhua) and shorthorn sculpin (Myoxocephalus scorpius) in the Baltic Sea.

    Science.gov (United States)

    Lunneryd, Sven-Gunnar; Boström, Maria Kristina; Aspholm, Paul Eric

    2015-01-01

    The anisakid nematode Pseudoterranova decipiens, known as the sealworm or cod worm, can infect the flesh of several fish species. The parasite causes cosmetic problems for the fish industry and can cause abdominal discomfort if consumed by humans. There are only scattered studies on the abundance or distribution of the sealworm in fish and seals in the Baltic Sea. To remedy this situation, the extent of sealworm infection was investigated in cod (Gadus morhua) and shorthorn sculpin (Myoxocephalus scorpius) collected along the Swedish coast. A relative presence of the sealworm was also investigated in samples from grey seal (Halichoerus grypus) stomachs. Up to 100% of the fish were infected in some of the areas. Sculpin were generally worse infected than cod, both in abundance and prevalence of parasites. General linear models showed a significant correlation between the number of seals in an area and the prevalence of sealworms in cod. There was a sharp decrease of infected fish in areas with salinity lower than 7‰. Even though the northern Baltic proper and the southern Bothnian Sea have a high number of grey seals, only one sealworm was found in a sculpin in that region, and none in cod. In grey seal stomachs the sealworm was only found in samples from the central Baltic proper; further north, all anisakid nematodes identified in seals were Contracaecum osculatum. The results indicate that seal presence drives the distribution in the southern parts of the Baltic and that low salinity, or some other variable which correlates with salinity, limits the distribution in the northern part.

  6. Vaccination improves survival of Baltic salmon ( Salmo salar ) smolts in delayed release sea ranching (net-pen period)

    DEFF Research Database (Denmark)

    Buchmann, Kurt; Dalsgaard, Inger; Nielsen, Michael Engelbrecht

    1997-01-01

    Baltic salmon (Salmo salar) of the Finnish Iijoki stock were hatched and reared in freshwater in a salmon hatchery on the Danish island of Bornholm in the Baltic sea. Salmon parr were divided in three groups each comprising 22 000 fish. One group was vaccinated by intraperitoneal injection....... In contrast, no increase of titres was seen in the bath vaccinated and untreated groups. Marked cellular reactions in the abdominal cavity of injected fish were registered. A total of 3000 fish have been tagged and released to evaluate the effect of vaccination on the recapture rate. The implications...

  7. Model calculations of the effects of present and future emissions of air pollutants from shipping in the Baltic Sea and the North Sea

    Directory of Open Access Journals (Sweden)

    J. E. Jonson

    2015-01-01

    Full Text Available Land-based emissions of air pollutants in Europe have steadily decreased over the past two decades, and this decrease is expected to continue. Within the same time span emissions from shipping have increased in EU ports and in the Baltic Sea and the North Sea, defined as SECAs (sulfur emission control areas, although recently sulfur emissions, and subsequently particle emissions, have decreased. The maximum allowed sulfur content in marine fuels in EU ports is now 0.1%, as required by the European Union sulfur directive. In the SECAs the maximum fuel content of sulfur is currently 1% (the global average is about 2.4%. This will be reduced to 0.1% from 2015, following the new International Maritime Organization (IMO rules. In order to assess the effects of ship emissions in and around the Baltic Sea and the North Sea, regional model calculations with the EMEP air pollution model have been made on a 1/4° longitude × 1/8° latitude resolution, using ship emissions in the Baltic Sea and the North Sea that are based on accurate ship positioning data. The effects on depositions and air pollution and the resulting number of years of life lost (YOLLs have been calculated by comparing model calculations with and without ship emissions in the two sea areas. In 2010 stricter regulations for sulfur emissions were implemented in the two sea areas, reducing the maximum sulfur content allowed in marine fuels from 1.5 to 1%. In addition ships were required to use fuels with 0.1 % sulfur in EU harbours. The calculations have been made with emissions representative of 2009 and 2011, i.e. before and after the implementation of the stricter controls on sulfur emissions from 2010. The calculations with present emissions show that per person, an additional 0.1–0.2 years of life lost is estimated in areas close to the major ship tracks with current emission levels. Comparisons of model calculations with emissions before and after the implementation of stricter

  8. Model calculations of the effects of present and future emissions of air pollutants from shipping in the Baltic Sea and the North Sea

    Science.gov (United States)

    Jonson, J. E.; Jalkanen, J. P.; Johansson, L.; Gauss, M.; Denier van der Gon, H. A. C.

    2015-01-01

    Land-based emissions of air pollutants in Europe have steadily decreased over the past two decades, and this decrease is expected to continue. Within the same time span emissions from shipping have increased in EU ports and in the Baltic Sea and the North Sea, defined as SECAs (sulfur emission control areas), although recently sulfur emissions, and subsequently particle emissions, have decreased. The maximum allowed sulfur content in marine fuels in EU ports is now 0.1%, as required by the European Union sulfur directive. In the SECAs the maximum fuel content of sulfur is currently 1% (the global average is about 2.4%). This will be reduced to 0.1% from 2015, following the new International Maritime Organization (IMO) rules. In order to assess the effects of ship emissions in and around the Baltic Sea and the North Sea, regional model calculations with the EMEP air pollution model have been made on a 1/4° longitude × 1/8° latitude resolution, using ship emissions in the Baltic Sea and the North Sea that are based on accurate ship positioning data. The effects on depositions and air pollution and the resulting number of years of life lost (YOLLs) have been calculated by comparing model calculations with and without ship emissions in the two sea areas. In 2010 stricter regulations for sulfur emissions were implemented in the two sea areas, reducing the maximum sulfur content allowed in marine fuels from 1.5 to 1%. In addition ships were required to use fuels with 0.1 % sulfur in EU harbours. The calculations have been made with emissions representative of 2009 and 2011, i.e. before and after the implementation of the stricter controls on sulfur emissions from 2010. The calculations with present emissions show that per person, an additional 0.1-0.2 years of life lost is estimated in areas close to the major ship tracks with current emission levels. Comparisons of model calculations with emissions before and after the implementation of stricter emission control on

  9. Even low to medium nitrogen deposition impacts vegetation of dry, coastal dunes around the Baltic Sea

    International Nuclear Information System (INIS)

    Remke, Eva; Brouwer, Emiel; Kooijman, Annemieke; Blindow, Irmgard; Esselink, Hans; Roelofs, Jan G.M.

    2009-01-01

    Coastal dunes around the Baltic Sea have received small amounts of atmospheric nitrogen and are rather pristine ecosystems in this respect. In 19 investigated dune sites the atmospheric wet nitrogen deposition is 3-8 kg N ha -1 yr -1 . The nitrogen content of Cladonia portentosa appeared to be a suitable biomonitor of these low to medium deposition levels. Comparison with EMEP-deposition data showed that Cladonia reflects the deposition history of the last 3-6 years. With increasing nitrogen load, we observed a shift from lichen-rich short grass vegetation towards species-poor vegetation dominated by the tall graminoid Carex arenaria. Plant species richness per field site, however, does not decrease directly with these low to medium N deposition loads, but with change in vegetation composition. Critical loads for acidic, dry coastal dunes might be lower than previously thought, in the range of 4-6 kg N ha -1 yr -1 wet deposition. - Even low to medium nitrogen deposition impacts Baltic dune vegetation promoting a dominance of taller graminoids

  10. Trophodynamics of mercury and other trace elements in a pelagic food chain from the Baltic Sea

    International Nuclear Information System (INIS)

    Nfon, Erick; Cousins, Ian T.; Jaervinen, Olli; Mukherjee, Arun B.; Verta, Matti; Broman, Dag

    2009-01-01

    Mercury (Hg) and 13 other trace elements (Al, Ti, V, Cr, Fe, Mn, Co, Ni, Cu, Zn, As, Cd, and Pb) were measured in phytoplankton, zooplankton, mysis and herring in order to examine the trophodynamics in a well-studied pelagic food chain in the Baltic Sea. The fractionation of nitrogen isotopes (δ 15 N) was used to evaluate food web structure and to estimate the extent of trophic biomagnification of the various trace elements. Trophic magnification factors (TMFs) for each trace element were determined from the slope of the regression between trace element concentrations and δ 15 N. Calculated TMFs showed fundamental differences in the trophodynamics of the trace elements in the pelagic food chain studied. Concentrations of Al, Fe, Ni, Zn, Pb and Cd showed statistically significant decreases (TMF 1) in concentration with trophic level i.e. Hg biomagnifies in this Baltic food chain. The estimated TMF for Hg in this food chain was comparable to TMFs observed elsewhere for diverse food chains and locations.

  11. Isotopic signatures of eelgrass (Zostera marina L.) as bioindicator of anthropogenic nutrient input in the western Baltic Sea

    International Nuclear Information System (INIS)

    Schubert, Philipp R.; Karez, Rolf; Reusch, Thorsten B.H.; Dierking, Jan

    2013-01-01

    Highlights: • Anthropogenic nitrogen (N) inputs are a global problem, but difficult to quantify. • We tested the use of eelgrass δ 15 N as proxy of such inputs in the Baltic Sea. • The method revealed distinct spatial patterns in sewage N across a eutrophic bay. • Traditional eutrophication measures corroborated the results from δ 15 N values. • Eelgrass δ 15 N ratios have high potential as proxy of sewage-derived N in the Baltic. -- Abstract: Eutrophication is a global environmental problem. Better management of this threat requires more accurate assessments of anthropogenic nitrogen (N) inputs to coastal systems than can be obtained with traditional measures. Recently, primary producer N isotopic signatures have emerged as useful proxy of such inputs. Here, we demonstrated for the first time the applicability of this method using the widespread eelgrass (Zostera marina) in the highly eutrophic Baltic Sea. Spatial availability of sewage N across a bay with one major sewage outflow predicted by eelgrass δ 15 N was high near and downstream of the outflow compared to upstream, but returned to upstream levels within 4 km downstream from the outfall. General conclusions were corroborated by traditional eutrophication measures, but in contrast to these measures were fully quantitative. Eelgrass N isotope ratios therefore show high potential for coastal screens of eutrophication in the Baltic Sea, and in other areas with eelgrass meadows

  12. Ocean acidification and desalination: climate-driven change in a Baltic Sea summer microplanktonic community.

    Science.gov (United States)

    Wulff, Angela; Karlberg, Maria; Olofsson, Malin; Torstensson, Anders; Riemann, Lasse; Steinhoff, Franciska S; Mohlin, Malin; Ekstrand, Nina; Chierici, Melissa

    2018-01-01

    Helcom scenario modelling suggests that the Baltic Sea, one of the largest brackish-water bodies in the world, could expect increased precipitation (decreased salinity) and increased concentration of atmospheric CO 2 over the next 100 years. These changes are expected to affect the microplanktonic food web, and thereby nutrient and carbon cycling, in a complex and possibly synergistic manner. In the Baltic Proper, the extensive summer blooms dominated by the filamentous cyanobacteria Aphanizomenon sp., Dolichospermum spp. and the toxic Nodularia spumigena contribute up to 30% of the yearly new nitrogen and carbon exported to the sediment. In a 12 days outdoor microcosm experiment, we tested the combined effects of decreased salinity (from 6 to 3) and elevated CO 2 concentrations (380 and 960 µatm) on a natural summer microplanktonic community, focusing on diazotrophic filamentous cyanobacteria. Elevated p CO 2 had no significant effects on the natural microplanktonic community except for higher biovolume of Dolichospermum spp. and lower biomass of heterotrophic bacteria. At the end of the experimental period, heterotrophic bacterial abundance was correlated to the biovolume of N. spumigena. Lower salinity significantly affected cyanobacteria together with biovolumes of dinoflagellates, diatoms, ciliates and heterotrophic bacteria, with higher biovolume of Dolichospermum spp. and lower biovolume of N. spumigena , dinoflagellates, diatoms, ciliates and heterotrophic bacteria in reduced salinity. Although the salinity effects on diatoms were apparent, they could not clearly be separated from the influence of inorganic nutrients. We found a clear diurnal cycle in photosynthetic activity and pH, but without significant treatment effects. The same diurnal pattern was also observed in situ ( p CO 2 , pH). Thus, considering the Baltic Proper, we do not expect any dramatic effects of increased p CO 2 in combination with decreased salinity on the microplanktonic food web

  13. Ship emissions and the use of current air cleaning technology: contributions to air pollution and acidification in the Baltic Sea

    Directory of Open Access Journals (Sweden)

    B. Claremar

    2017-10-01

    Full Text Available The shipping sector is a significant contributor to emissions of air pollutants in marine and coastal regions. In order to achieve sustainable shipping, primarily through new regulations and techniques, greater knowledge of dispersion and deposition of air pollutants is required. Regional model calculations of the dispersion and concentration of sulfur, nitrogen, and particulate matter, as well as deposition of oxidized sulfur and nitrogen from the international maritime sector in the Baltic Sea and the North Sea, have been made for the years 2011 to 2013. The contribution from shipping is highest along shipping lanes and near large ports for concentration and dry deposition. Sulfur is the most important pollutant coupled to shipping. The contribution of both SO2 concentration and dry deposition of sulfur represented up to 80 % of the total in some regions. WHO guidelines for annual concentrations were not trespassed for any analysed pollutant, other than PM2.5 in the Netherlands, Belgium, and central Poland. However, due to the resolution of the numerical model, 50 km  ×  50 km, there may be higher concentrations locally close to intense shipping lanes. Wet deposition is more spread and less sensitive to model resolution. The contribution of wet deposition of sulfur and nitrogen from shipping was up to 30 % of the total wet deposition. Comparison of simulated to measured concentration at two coastal stations close to shipping lanes showed some underestimations and missed maximums, probably due to resolution of the model and underestimated ship emissions. A change in regulation for maximum sulfur content in maritime fuel, in 2015 from 1 to 0.1 %, decreases the atmospheric sulfur concentration and deposition significantly. However, due to costs related to refining, the cleaning of exhausts through scrubbers has become a possible economic solution. Open-loop scrubbers meet the air quality criteria but their consequences for

  14. Report of the ninth meeting of the Baltic Marine Environment Protection Commission - Helsinki Commission (HELCOM). Convention on the Protection of the Marine Environment of the Baltic Sea Area

    International Nuclear Information System (INIS)

    1988-01-01

    This document is the report of the ninth meeting of the Baltic Marine Environment Protection Commission - the Helsinki Commission - held in Helsinki 15-19 February 1988. The Commission is composed of the representatives of Denmark, Finland, Federal Republic of Germany, Poland, Sweden and the Union of Soviet Socialist Republics as well as national, regional and international organizations. The Meeting made a number of proposals and recommendations on the protection of the marine environment

  15. Qualitative and quantitative composition of microplastics particles during the expeditionary measurement program in the South-Eastern Baltic Sea

    Science.gov (United States)

    Esiukova, Elena; Bagaeva, Margarita; Chubarenko, Natalia

    2016-04-01

    According to the tasks of the Russian Science Foundation project "Physical and dynamical properties of marine microplastics particles and their transport in a basin with vertical and horizontal salinity gradient on the example of the Baltic Sea" number 15-17-10020, a comprehensive expeditionary program of measurements in the South-Eastern Baltic started. The project is aimed at finding solutions for a number of problems caused by superfluous plastic pollution in the World Ocean and, in particular, in the Baltic Sea. This pollution has been accumulating for years and just recently it has become obvious that only multidisciplinary approach (geographical, biological, chemical, etc.) to the issues related to the processes of transformation of properties and propagation of plastic particles will allow the study of physical aspects of the problem. During the first stage of the study samples should be selected from the water surface, water column at various horizons, bottom sediments in the Baltic Sea, from different areas at the beaches - in order to further examine the qualitative and quantitative composition of microplastic particles in different seasons for different hydrophysical situations. Reconnaissance survey was begun to choose the fields for research close to point and distributed sources of microplastics. Preference is given to those beaches that are exposed to maximum anthropogenic pollution: areas around the town of Baltiysk, the northern part of the Vistula Spit (near the settlement of Kosa), and the Sambia peninsula coast (settlements of Yantarny, Donskoye, Primorye, Kulikovo, towns of Svetlogorsk, Pionersky, Zelenogradsk). Locations for experimental sites were found in order to assess time for formation of microplastics (Vistula Spit, Kosa settlement). In June-November, 2015 there were 5 expeditions in the waters of the South-Eastern Baltic, 7 expeditions along the coast line of the Baltic Sea (in Kaliningrad Oblast), and 5 expeditions to the Vistula

  16. Regional variations in diffuse nitrogen losses from agriculture in the Nordic and Baltic regions

    Directory of Open Access Journals (Sweden)

    N. Vagstad

    2004-01-01

    Full Text Available This paper describes nitrogen losses from, and the characteristics of, 35 selected catchments (12 to 2000 ha in the Nordic and Baltic countries. Average annual losses of N in 1994–1997 ranged from 5 to 75 kg ha-1, generally highest and characterised by significant within-country and interannual variations, in Norway and the lowest losses were observed in the Baltic countries. An important finding of the study is that the average nutrient losses varied greatly among the studied catchments. The main explanations for this variability were water runoff, fertiliser use (especially the amount of manure, soil type and erosion (including stream bank erosion. However, there were several exceptions, and it was difficult to find general relationships between the individual factors. For example, there was poor correlation between nitrogen losses and surpluses. Therefore, the results suggest that the observed variability in N losses cannot have been due solely to differences in farm management practices, although the studied catchments do include a wide range of nutrient application levels, animal densities and other relevant elements. There is considerable spatial variation in the physical properties (soil, climate, hydrology, and topography and the agricultural management of the basins, and the interaction between and relative effects of these factors has an important impact on erosion and nutrient losses. In particular, hydrological processes may have a marked effect on N losses measured in the catchment stream water. The results indicate that significant differences in hydrological pathways (e.g. the relationship between fast- and slow-flow processes lead to major regional differences in N inputs to surface waters and therefore also in the response to changes in field management practices. Agricultural practices such as crop rotation systems, nutrient inputs and soil conservation measures obviously play a significant role in the site-specific effects

  17. Species interactions in the western Baltic Sea: With focus on the ecological role of whiting

    DEFF Research Database (Denmark)

    Ross, Stine Dalmann

    , which potentially prey on and compete for food with whiting. Here, the growth dynamics and feeding ecology of whiting in the western Baltic Sea is investigated and discussed in an ecosystem context. Furthermore, the diet of the harbour porpoise is examined and the interactions between whiting, cod......The food web of the upper trophic levels in marine ecosystems is often complex, encompassing multiple biological interactions. One species may serve as prey, predator and competitor at the same time, and the interactions are likely to change with the ontogenetic development from juvenile to adult....... Disentangling food web dynamics is important for both ecologists and conservationists involved with management. Multispecies assessment models and ecosystem-based trophic models are becoming increasingly used as tools to investigate and assess biological interactions and predation impacts of key species...

  18. Relationships between inherent optical properties in the Baltic Sea for application to the underwater imaging problem

    Directory of Open Access Journals (Sweden)

    Sławomir Sagan

    2013-02-01

    Full Text Available Statistical relationships between coefficients of light attenuation, scattering and backscattering at wavelength 550 nm derived from series of optical measurements performed in Baltic Sea waters are presented. The relationships were derived primarily to support data analysis from underwater imaging systems. Comparison of these relations with analogous empirical data from the Atlantic and Pacific Oceans shows that the two sets of relationships are similar, despite the different water types and the various experimental procedures and instrumentation applied. The apparently universal character of the relationships enables an approximate calculation of other optical properties and subsequently of the contrast, signal/noise ratio, visibility range and spatial resolution of underwater imaging systems based on attenuation coefficients at wavelength 550 nm only.

  19. In-air spectral signatures of the Baltic Sea macrophytes and their statistical separability

    Science.gov (United States)

    Kotta, Jonne; Remm, Kalle; Vahtmäe, Ele; Kutser, Tiit; Orav-Kotta, Helen

    2014-01-01

    Many macroalgal species potentially have distinctive spectral signatures detectable using remote sensing. In order to map the spatial distribution of these species, their spectral properties have to be quantified and statistical differences between species need to be assessed. In the present study, we collected a spectral library of the key benthic macrophyte species in the Baltic Sea area and presented the methodology that allows quantifying statistical differences between their reflectance spectra. The results indicate that three broad groups of algae-green, brown, and red algae-can be separated based on their optical signatures. In general, the between-species differences are too small to allow easy recognition of benthic algae based on their untransformed reflectance spectra. However, the distinctness of the studied species and taxa improves if standardized reflectance values are used. The best indicative spectral range was at 530 to 570 nm for the separation of species and of larger taxonomic units.

  20. Report on the intercomparison run IAEA-306 radionuclides in Baltic Sea sediment

    International Nuclear Information System (INIS)

    Ballestra, S.; Vas, D.; Lopez, J.J.; Noshkin, V.

    1989-10-01

    The results of an intercomparison exercise on a Baltic Sea sediment sample, coded as IAEA-306, designed for the determination of artificial and natural radionuclide levels, are reported. This sample was collected in the fall 1986. It was anticipated that the concentrations of the artificial radionuclides in this sediment would be higher than the environmental levels usually found and, therefore, would constitute an excellent intercomparison sample. The data from 84 laboratories representing 34 countries have been evaluated. The most frequently measured radionuclid