Biology
Scientific paper
Nov 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.518...87k&link_type=abstract
In: Proceedings of the First European Workshop on Exo-Astrobiology, 16 - 19 September 2002, Graz, Austria. Ed.: Huguette Lacoste
Biology
1
Planetary Surfaces: Greenhouse Effect
Scientific paper
Classical thermophysical models of airless solar system bodies assume complete opaqueness of the surface material. This means that the insolation is absorbed at the immediate surface. However, if the surface consists of particles which are neither dark nor optically thick, the assumption of absorption at the surface is no longer valid. In the case of a medium which is optically thin in the visible and opaque in the thermal infrared (e.g. H2O-ice, CO2-ice), a deposition of energy below the surface occurs and the average temperature of interior layers should be higher than the average surface temperature. This subsurface heating process is the so-called Solid-State Greenhouse Effect. Recently a new project was started at IWF to reach a better understanding of the phenomenon described above. Our research will concentrate on the thermal and optical properties of icy areas on Earth, the Mars polar caps, Jupiter's satellite Europa, and comets.
Kargl Günter
Kaufmann Erika
Kömle Norbert I.
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