CO2 condensation and the climate of early Mars

Details CO2 condensation and the climate of early Mars CO2 condensation and the climate of early Mars

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...94....1k&link_type=abstract

Icarus (ISSN 0019-1035), vol. 94, Nov. 1991, p. 1-13. Research supported by NASA.

Physics

168

Atmospheric Physics, Carbon Dioxide Concentration, Climate, Mars Atmosphere, Condensation, Greenhouse Effect, Mariner 9 Space Probe, Planetary Evolution

Scientific paper

The possibility of the early Mars' greenhouse warming by a dense CO2 atmosphere is presently examined by means of a 1D radiative-convective climate model which differs from earlier ones in considering the effects of CO2 clouds on both the convective lapse rate and the planetary radiation budget. The phenomenon of CO2 condensation, which decreases the lapse rate and thereby reduces the greenhouse effect, increases in importance at low solar luminosities; it may accordingly preclude globally averaged surface temperatures as high as 0 C before about 2 billion years ago in the absence of such other greenhouse gases as CO2 and H2O. Alternative explanations for early Mars warming and channel-formation processes are noted.

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