The case for a wet, warm climate on early Mars

Details The case for a wet, warm climate on early Mars The case for a wet, warm climate on early Mars

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...71..203p&link_type=abstract

(NASA, Lunar and Planetary Institute, and National Air and Space Museum, MECA Conference on Mars: The Evolution of Its Climate a

Mathematics

289

Climatology, Mars Atmosphere, Mathematical Models, Moisture Content, Planetary Evolution, Carbon Dioxide, Geochemistry, Graphs (Charts), Greenhouse Effect, Water, Mars, Water, Climate, Theoretical Studies, Carbon Dioxide, Atmosphere, Calculations, Models, Radiation, Convection, Pressure, Temperature, Luminosity, Greenhouse Effect, Geochemistry, Weathering, Decomposition, Thermal Effects, Volcanism, Calculations, Source, Partitioning, Hydrosphere, Volatiles, Cycles, Carbonates

Scientific paper

The conditions under which Mars could have had a warm wet climate during its early evolution are explored by means of numerical simulations, incorporating more accurate data on the opacity of gaseous CO2 and H2O in the solar and thermal spectral regions (McClatchey et al., 1971) into the one-dimensional radiative-convective greenhouse model of Kasting and Ackerman (1986). The results are presented in extensive graphs and characterized in detail, with consideration of atmospheric CO2 loss rates, sources of atmospheric CO2, CO2 partitioning between atmosphere and hydrosphere, the Mars volatile inventory, the CO2 geochemical cycle, climate evolution, and observational tests. It is concluded that greenhouse conditions (requiring atmospheric CO2 of 1-5 bar) could have existed for a period of about 1 Gyr if the total surficial inventory of CO2 was 2-10 bar.

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