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Atmospheric Escape and Evolution of Terrestrial Planets and Satellites

H. Lammer 1 J. F. Kasting 2 Eric Chassefière 3 R.E. Johnson 4 Y.N. Kulikov 5 F. Tian 6
1 IWF - Space Research Institute of Austrian Academy of Sciences
2 Department of Geosciences [PennState]
3 SA - Service d'aéronomie
4 MS - Department of Materials Science and Engineering [Charlottesville]
5 PGI - Polar Geophysical Institute of Russian Academy of Sciences
6 NCAR - National Center for Atmospheric Research [Boulder]
Abstract : The origin and evolution of Venus', Earth's, Mars' and Titan's atmospheres are discussed from the time when the active young Sun arrived at the Zero-Age-Main-Sequence. We show that the high EUV flux of the young Sun, depending on the thermospheric composition, the amount of IR-coolers and the mass and size of the planet, could have been responsible that hydrostatic equilibrium was not always maintained and hydrodynamic flow and expansion of the upper atmosphere resulting in adiabatic cooling of the exobase temperature could develop. Furthermore, thermal and various nonthermal atmospheric escape processes influenced the evolution and isotope fractionation of the atmospheres and water inventories of the terrestrial planets and Saturn's large satellite Titan efficiently.
Keywords : Terrestrial planets Magnetic protection Isotope anomalies Escape Atmosphere evolution Young Sun
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https://hal.archives-ouvertes.fr/hal-00375029
Contributor : Catherine Cardon <>
Submitted on : Saturday, April 11, 2009 - 1:17:18 PM
Last modification on : Tuesday, December 15, 2020 - 4:02:45 AM

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CNRS | INSU | UPMC | UVSQ | AERONOMIE | SORBONNE-UNIVERSITE

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H. Lammer, J. F. Kasting, Eric Chassefière, R.E. Johnson, Y.N. Kulikov, et al.. Atmospheric Escape and Evolution of Terrestrial Planets and Satellites. Space Science Reviews, Springer Verlag, 2008, 139 (1-4), pp.399-436. ⟨10.1007/s11214-008-9413-5⟩. ⟨hal-00375029⟩

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