Limits on the CO2 Content of the Martian Polar Deposits

Details Limits on the CO2 Content of the Martian Polar Deposits Limits on the CO2 Content of the Martian Polar Deposits

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..859m&link_type=abstract

Lunar and Planetary Science, volume 27, page 859

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Carbon Dioxide, Clathrate, Climate, Deposits: Polar, Mars

Scientific paper

It has recently been suggested that large quantities of CO2 could be sequestered within the martian polar deposits as CO2 ice or CO2 clathrate hydrate, stabilized against sublimation by a non-porous overburden of water ice. I investigate the phase stability of CO2-bearing polar ices and place limits on the quantity of CO2 that can be sequestered. The magnitude of this limitation follows from CO2-bearing ices having thermal conductivities on the order of 5 to 6 times smaller than that of water ice, producing a higher geothermal gradient. By calculating the effective thermal conductivity of a mixture of ices and the resulting temperature-pressure profile of the polar deposits and comparing these profiles with the phase diagrams of water ice, CO2 ice, and CO2 clathrate hydrate, I set limits on the quantity of CO2 in the polar deposits.

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