Simultaneous adsorption of CO2 and H2O under Mars-like conditions and application to the evolution of the Martian climate

Details Simultaneous adsorption of CO2 and H2O under Mars-like conditions and application to the evolution of the Martian climate Simultaneous adsorption of CO2 and H2O under Mars-like conditions and application to the evolution of the Martian climate

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994lpi....25.1543z&link_type=abstract

In Lunar and Planetary Inst., The Twenty-Fifth Lunar and Planetary Science Conference. Part 3: P-Z p 1543-1544 (SEE N94-35448 11

Computer Science

Adsorption, Adsorptivity, Carbon Dioxide, Climate Change, Mars Atmosphere, Mars Environment, Water Vapor, Atmospheric Composition, Atmospheric Pressure, Mars Surface, Planetary Geology, Regolith

Scientific paper

The Martian regolith is the most substantial volatile reservoir on the planet; it holds CO2 as adsorbate, and can exchange that CO2 with the atmosphere-cap system over timescales of 105 to 106 years. The climatic response to insolation changes caused by obliquity and eccentricity variations depends in part on the total reservoir of adsorbed CO2. Previous estimates of the adsorbate inventory have been made by measuring the adsorptive behavior of one or more Mars-analyog materials, and deriving an empirical equation that described that adsorption as a function of the partial pressure of CO2 and the temperature of the regolith. The current CO2 inventory is that which satisfies adsorptive equilibrium, observed atmospheric pressure, and no permanent CO2 caps. There is laboratory evidence that H2O poisons the CO2 adsorptive capacity of most materials. No consideration of CO2 - H2O co-adsorption was given in previous estimates of the Martian CO2 inventory, although H2O is present in the vapor phase, and so as adsorbate, throughout the regolith.

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