Mathematics – Logic
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phdt.........6c&link_type=abstract
Ph.D. Thesis Massachusetts Univ., Amherst.
Mathematics
Logic
1
Astronomical Models, Climate, Ice, Mars (Planet), Water, Equatorial Regions, Ground Water, Polar Regions, Regolith
Scientific paper
Present climatic conditions on Mars preclude the existence of ground ice in equilibrium with the atmosphere within the latitude band of + or - 40 deg. Yet, various lines of morphologic evidence suggest that substantial quantities of H2O have survived in the equatorial regolith for billions of years. The stability of equatorial ground ice was examined on the basis of current understanding of the physical properties of the Martian regolith. The results of this analysis suggest that any ground ice, emplaced earlier than 3.5 billion years ago, may have long since been lost by sublimation to the atmosphere. In light of these results, alternative explanations for the long-term survival of equatorial ground ice are considered. Chief among these is the possibility of replenishment from subsurface sources of H2O. Such replenishment may occur in response to the Martian geothermal gradient, whereby H2O is driven from the warmer depths to the colder near-surface regolith.
Clifford Stephen M.
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