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Co-Evolution of Atm...
Co-Evolution of Atmospheres, Life, and Climate
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- Grenfell, J. L. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Rauer, H. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Technische Universität Berlin
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- Selsis, F. (author)
- Université de Bordeaux,University of Bordeaux
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- Kaltenegger, L. (author)
- Harvard-Smithsonian Center for Astrophysics
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Beichman, C. (author)
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- Danchi, W. (author)
- NASA Goddard Space Flight Center
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- Eiroa, C. (author)
- Universidad Autonoma de Madrid (UAM)
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- Fridlund, M. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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- Henning, T. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Herbst, T. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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Lammer, H. (author)
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- Leger, A. (author)
- Université Paris-Sud XI,University of Paris-Sud XI
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- Liseau, René, 1949 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Lunine, J. (author)
- University of Arizona
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- Paresce, F. (author)
- Istituto nazionale di astrofisica (INAF)
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- Penny, A. (author)
- STFC Rutherford Appleton Laboratory
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Quirrenbach, A. (author)
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- Rottgering, H. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Schneider, J. (author)
- Observatoire de Paris-Meudon
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- Stam, D. (author)
- Netherlands Institute for Space Research (SRON)
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- Tinetti, G. (author)
- University College London (UCL)
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- White, G. J. (author)
- STFC Rutherford Appleton Laboratory,Open University
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(creator_code:org_t)
- Mary Ann Liebert Inc, 2010
- 2010
- English.
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In: Astrobiology. - : Mary Ann Liebert Inc. - 1531-1074 .- 1557-8070. ; 10:1, s. 77-88
- Related links:
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http://dx.doi.org/10...
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http://oro.open.ac.u...
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Subject headings
Close
- After Earth's origin, our host star, the Sun, was shining 20-25% less brightly than today. Without greenhouse-like conditions to warm the atmosphere, our early planet would have been an ice ball, and life may never have evolved. But life did evolve, which indicates that greenhouse gases must have been present on early Earth to warm the planet. Evidence from the geological record indicates an abundance of the greenhouse gas CO2. CH4 was probably present as well; and, in this regard, methanogenic bacteria, which belong to a diverse group of anaerobic prokaryotes that ferment CO2 plus H-2 to CH4, may have contributed to modification of the early atmosphere. Molecular oxygen was not present, as is indicated by the study of rocks from that era, which contain iron carbonate rather than iron oxide. Multicellular organisms originated as cells within colonies that became increasingly specialized. The development of photosynthesis allowed the Sun's energy to be harvested directly by life-forms. The resultant oxygen accumulated in the atmosphere and formed the ozone layer in the upper atmosphere. Aided by the absorption of harmful UV radiation in the ozone layer, life colonized Earth's surface. Our own planet is a very good example of how life-forms modified the atmosphere over the planets' lifetime. We show that these facts have to be taken into account when we discover and characterize atmospheres of Earth-like exoplanets. If life has originated and evolved on a planet, then it should be expected that a strong co-evolution occurred between life and the atmosphere, the result of which is the planet's climate.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- methane
- Atmospheres
- Climate
- halogen occultation experiment
- ozone
- Exoplanets
- Biomarker
- 2-dimensional model
- long-term
- hydrogen
- earth-like planets
- middle-atmosphere
- Early Earth
- evolution
- habitable zones
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database
- By the author/editor
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Grenfell, J. L.
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Rauer, H.
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Selsis, F.
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Kaltenegger, L.
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Beichman, C.
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Danchi, W.
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show more...
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Eiroa, C.
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Fridlund, M.
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Henning, T.
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Herbst, T.
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Lammer, H.
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Leger, A.
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Liseau, René, 19 ...
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Lunine, J.
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Paresce, F.
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Penny, A.
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Quirrenbach, A.
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Rottgering, H.
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Schneider, J.
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Stam, D.
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Tinetti, G.
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White, G. J.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Astrobiology
- By the university
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Chalmers University of Technology