Physics – Geophysics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept..161f&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 161-162 (SEE N87-23341 16-91)
Physics
Geophysics
Adsorption, Climate, Greenhouse Effect, Mars (Planet), Mars Atmosphere, Regolith, Water, Carbonates, Mars Surface
Scientific paper
Researchers reexamined radiative transfer models of early Mars that were advanced to show the existance of a greenhouse effect. These models were reexamined with regard to the effect that regolith adsorption may have had. It is argued that while the precipitation of carbonates has probably been an important process during Mars history, the rates at which this process could have taken place under early Mars conditions would have dropped sharply once liquid water was fairly scarce. Furthermore, conditions under which liquid water was available may have involved efficient recycling of carbonate so that steady state conditions rather than irreversible CO2 removal prevailed. In contrast, the growth of regolith surface area demands corresponding and predictable CO2 removal from the atmosphere-cap system and is fully capable of terminating any enhanced temperature regime on early Mars in the absence of any other effects.
Fanale Fraser P.
Postawko Susan E.
Salvail James R.
Zent Aaron P.
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