Sample records for ATMOSFERA TERRESTRE (earth atmosphere)
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1

La Tierra vista como exoplaneta/ Earth as an exoplanet

Segura, Antígona
2010-08-01

Resumen en español La Tierra, como único ejemplo de planeta habitable, nos da los primeros elementos para caracterizar el espectro de planetas de tipo terrestre alrededor de otras estrellas que podrían ser detectados en el transcurso de la próxima década gracias a misiones como CoRoT y Kepler y caracterizados por las misiones Terrestrial Planet Finder y Darwin. En este artículo se compendian los estudios que utilizan a la Tierra para determinar las posibles características de mundos h (mas) abitables alrededor de otras estrellas. A partir de comparar las características de la Tierra con las de los demás planetas terrestres del Sistema Solar se ha determinado que, en principio, un planeta habitable debe tener atmósfera, agua líquida y el tamaño adecuado para retener dicha atmósfera y mantener actividad tectónica por periodos de tiempo geológicamente largos. Un planeta habitado podría ser reconocido como tal a partir de la detección de bioseñales en su espectro. Simulaciones de atmósferas similares a la Tierra presente y pasada, así como el conocimiento de la evolución geológica de nuestro planeta indican que el oxígeno (O2) resulta una excelente señal de vida, en especial si está acompañado de compuestos como el metano o el óxido nitroso. Los pigmentos usados por organismos fotosintéticos también pueden generar una señal en el espectro de un planeta, la cual sería similar a la absorción de la clorofila en la Tierra. Las observaciones del brillo de la Tierra permiten analizar el espectro promediado del disco de nuestro planeta y determinar los cambios de las bioseñales dadas diferentes condiciones de iluminación y geometría. A partir de estas observaciones y modelos que generan espectros promediados del disco terrestre, se ha encontrado que la presencia de nubes en una atmósfera es el mayor reto para reconocer bioseñales y, en general, las características de la superficie planetaria. La concentración atmosférica de los compuestos producidos por la vida depende de la cantidad de radiación ultravioleta que recibe el planeta, pues ésta controla buena parte de la química atmosférica. Esta radiación depende del tipo de estrella alrededor de la cual gira el planeta. La caracterización de planetas de tipo terrestre requiere conocer las propiedades de la estrella alrededor de la cual se buscan planetas (edad, temperatura superficial, radiación emitida del ultravioleta al infrarrojo), así como construir bibliotecas de espectros planetarios que permitan reconocer los mundos habitables de los que no lo son. Resumen en inglés Earth, as the only example of a habitable world, offers thefirst elements to characterize the spectra ofterrestrial planets around other stars. Those planets may be detected in the next decade by missions like CoRoT and Kepler, and characterized by Terrestrial Planet finder and Darwin. In this paper, I reviewed the research that uses Earth to determine the possible characteristics of habitable worlds around other stars. Comparing Earth's characteristics with those of the (mas) terrestrial planets in the Solar System, the main properties of a habitable world have been determined. A habitable planet must have atmosphere, liquid water and the right size to keep that atmosphere and to maintain tectonic activity for long geologic periods. A habitable world could be recognized as such by the detection of biosignatures on its spectrum. Simulations ofpast and present Earth-like atmospheres and the knowledge of the geological evolution of our planet indicate that oxygen (O2) is an excellent signature of life, in particular if it comes along with compounds like methane and nitrous oxide. Also, the pigments used by photosynthetic organisms could generate a signature in a planet's spectrum. This signature may be similar to the chlorophyll absorption on Earth. Earthshine observations help to analyze the disk average spectrum of our planet and to determine the changes of the biosignatures given certain conditions of illumination and geometry. From such observations and models that generate disk averaged spectra of Earth it has been found that clouds are the biggest challenge to identify biosignatures and characteristics of the planetary surface in general. The atmospheric abundance of the compounds produced by life depends on the amount ofultraviolet radiation received by the planet as it drives most of the atmospheric chemistry. This radiation depends on the stellar type of the planet's parent star. The characterization of terrestrial planets requires the knowledge of the target star properties (age, effective temperature, radiation emitted from the ultraviolet to the infrared), as well as to build spectra libraries that allow recognizing habitable worlds from those that are not.

Scientific Electronic Library Online (Spanish)

2

What do we know today about Titan?

Lara, Luisa María; Rodrigo Montero, Rafael; López-Moreno, José Juan
2006-01-01

Digital.CSIC (Spain)

3

Vibrational quenching of CO2(010) by collisions with O(3P) at thermal energies: A quantum-mechanical study

Lara Castells, M. Pilar de; Hernández, Marta I.; Delgado Barrio, Gerardo; Villarreal, Pablo; López-Puertas, Manuel
2006-04-24

Digital.CSIC (Spain)

4

Time Calibration and Point Source Analysis with the ANTARES Neutrino Telescope

Zúñiga, Juan; Zornoza, J.D.; Salesa-Greus, Francisco
2010-11-29

Digital.CSIC (Spain)

5

The persistence of balance in geophysical flows

Dritschel, David G.; Viúdez, Álvaro
2007-01-03

Digital.CSIC (Spain)

7

Structural and magnetic properties of Er(Co,Mn)O3 perovskite

Antunes, A.B.; Peña, O.; Moure, C.; Gil, V.; André, G.
2007-01-01

Digital.CSIC (Spain)

9

Short-term effects of gamma ray bursts on oceanic photosynthesis

Peñate, Liuba; Martín, Osmel; Cárdenas, Rolando; Agustí, Susana
2010-08-04

Digital.CSIC (Spain)

10

Sensitivity on earth core and mantle densities using atmospheric neutrinos

Borriello, E.; Mangano, G.; Marotta, A.; Miele, G.; Migliozzi, P.; Moura, C.; Pastor, Sergio; Pisanti, O.; Strolin, P.
2009-06-22

Digital.CSIC (Spain)

15

Production of nitrogen oxides by lightning and coronae discharges in simulated early Earth, Venus and Mars environments

Nna Mvondo, Delphine; Navarro González, Rafael; McKay, Christopher P.; Coll, Patrice; Raulin, François
2001-07-10

Digital.CSIC (Spain)

16

Preparation and properties of disordered NaBi(XO4)2, X = W or Mo, crystals doped with rare earths

Volkov, Vladimir; Rico, Mauricio; Mendez-Blas, Antonio; Zaldo, Carlos
2001-10-17

Digital.CSIC (Spain)

17

Physics and chemistry of icy particles in the universe: answers from microgravity.

Ehrenfreund, P.; Fraser, H. J.; Blum, J.; Cartwright, Julyan H. E.; García-Ruiz, J. M.; Hadamcik, E.; Levasseur-Regourd, A. C.; Price, S.; Prodi, F.; Sarkissian, A.
2003-07-01

Digital.CSIC (Spain)

18

Overview of the SMOS Sea Surface Salinity Prototype Processor

Zine, Sonia; Boutin, Jacqueline; Font, Jordi; Reul, Nicolas; Waldteufel, Philippe; Gabarró, Carolina; Tenerelli, Joseph; Petitcolin, François; Vergely, Jean-Luc; Talone, Marco; Delwart, Steven
2008-03-01

Digital.CSIC (Spain)

19

Observations of a very bright fireball and its likely link with comet C/1919 Q2 Metcalf

Trigo-Rodríguez, Josep Maria; Madiedo, José M.; Williams, Iwan P.; Castro-Tirado, Alberto J.; Llorca, Jordi; Vítek, Stanislav; Jelínek, Martin
2009-02-11

Digital.CSIC (Spain)

20

Nitrogen Fixation By Corona Discharge On The Early Precambrian Earth

Nna Mvondo, Delphine; Navarro González, Rafael; Raulin, François; Coll, Patrice
2005-10-18

Digital.CSIC (Spain)

21

Neutrino oscillograms of the Earth: effects of 1-2 mixing and CP-violation

Akhmedov, Evgeny Kh.; Maltoni, Michele; Smirnov, Alexei Yu.
2004-06-18

Digital.CSIC (Spain)

24

Modelling soil moisture at SMOS scale by use of a SVAT model over the Valencia Anchor Station

Juglea, S.; Kerr, Y.; Mialon, A.; Wigneron, J.P.; López-Baeza, E.; Cano, A.; Albitar, A.; Millán-Scheiding, C.; Antolín Tomás, C.; Delwart, S.
2010-01-01

Digital.CSIC (Spain)

25

Machine for the controlled reproduction of the pressure, temperature and irradiation conditions of planetary atmospheres or terrestrial environments and method of using said machine

Martín Gago, José Ángel; Gómez Elvira, Javier; Mateo Martí, Eva; Prieto Ballesteros, Olga; Sobrado Vallecillo, Jesús Manuel
2007-05-03

Digital.CSIC (Spain)

27

Key role of spin-orbit effects in the relaxation of CO2(010) by thermal collisions with O(3Pj)

Lara Castells, M. Pilar de; Hernández, Marta I.; Delgado Barrio, Gerardo; Villarreal, Pablo; López-Puertas, Manuel
2007-05-01

Digital.CSIC (Spain)

28

INTEGRAL observations of the cosmic X-ray background in the 5-100 keV range via occultation by the Earth

Churazov, E.; Sunyaev, R.; Revnivtsev, M.; Sazonov, S.; Molkov, S.; Grebenev, S.; Winkler, C.; Parmar, A.; Bazzano, A.; Falanga, M.; Gros, A.; Lebrun, F.; Natalucci, L.; Ubertini, P.; Roques, J.-P.; Bouchet, L.; Jourdain, E.; Knödlseder, J.; Diehl, R.; Budtz-Jorgensen, C.; Brandt, S.; Lund, N.; Westergaard, N. J.; Neronov, A.; Türler, M.; Chernyakova, M.; Walter, Malcolm R.; Produit, N.; Mowlavi, N.; Mas-Hesse, J. Miguel; Domingo Garau, Albert; Gehrels, N.; Kuulkers, E.; Kretschmar, P.; Schmidt, M.
2007-01-01

Digital.CSIC (Spain)

29

Hunting long-lived gluinos at the Pierre Auger Observatory

Anchordoqui, Luis A.; Delgado, Antonio; García Canal, Carlos A.; Sciutto, Sergio J.
2007-10-02

Digital.CSIC (Spain)

30

Far-IR spectroscopy towards Sagittarius B2

Goicoechea, Javier R.; Cernicharo, José
2004-02-06

Digital.CSIC (Spain)

31

Evidence of a nitrogen deficiency as a selective pressure towards the origin of biological nitrogen fixation in the early Earth

Calva-Alejo, Leonel; Nna Mvondo, Delphine; McKay, Christopher P.; Navarro González, Rafael
2000-01-01

Digital.CSIC (Spain)

33

Contribución del observatorio del Ebro al estudio de la ionosfera terrestre

Alberca, Luis F.; Altadill, David; Solé, J. Germán; Galdón, Eduardo; Apostolov, Emil M.

[EN] This paper is a résumé of the development of the ionospheric research at Ebro Observatory. The work is divided in two main parts. The first one highlights the historical achievements, and, again, it is divided in two parts: one explains the contribution to the study of the total electron conten...

DRIVER (Spanish)

34

Atlantic Ocean CARINA data: overview and salinity adjustments

Tanhua, T.; Steinfeldt, R.; Key, Robert M.; Brown, P.; Gruber, N.; Wanninkhof, R.; Pérez, Fiz F.; Körtzinger, Arne; Velo, A.; Schuster, U.; Van Heuven, S.; Bullister, J. L.; Stendardo, I.; Hoppema, M.; Olsen, A.; Kozyr, A.; Pierrot, D.; Schirnick, C.; Wallace, D. W. R.
2010-02-01

Digital.CSIC (Spain)

35

Archaeometric study of bricks from the ancient defence walls around the town of Pavia in northern Italy.

Setti, M.; Nicola, C.; López-Galindo, A.; Lodola, S.; Maccabruni, C.; Veniale, F.
2006-07-01

Digital.CSIC (Spain)

36

Análisis de observaciones de marea de extensión en Lanzarote

Arnoso, José; Vieira, Ricardo; Vélez, Emilio; Cai, Weixin; Tan, Shiling; Venedikov, A. P.
2003-01-01

Digital.CSIC (Spain)

37

An evolutionary analysis of the reaction mechanisms of photosystem I reduction by cytochrome c(6) and plastocyanin

Rosa, Miguel A. de la; Navarro, José A.; Díaz-Quintana, Antonio; Cerda, Berta de la; Molina-Heredia, Fernando P.; Balme, Alexis; Murdoch, Piedad del S.; Díaz-Moreno, Irene; Durán, Raúl V.; Hervás, Manuel
2002-01-01

Digital.CSIC (Spain)

38

Abrupt Younger Dryas cooling in the northern tropics recorded in lake sediments from the Venezuelan Andes.

Stansell, Nathan D.; Abbott, Mark B.; Rull, Valentí; Rodbell, Donald T.; Bezada, Maximiliano; Montoya, Encarnación
2010-01-01

Digital.CSIC (Spain)

39

A possible nitrogen crisis for Archaean life due to reduced nitrogen fixation by lightning

Navarro González, Rafael; McKay, Christopher P.; Nna Mvondo, Delphine
2001-07-05

Digital.CSIC (Spain)

41

4D volcano gravimetry

Battaglia, Mauricio; Gottsmann, Joachim; Carbone, Daniele; Fernández Torres, José
2008-11-20

Digital.CSIC (Spain)