Mathematics – Logic
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.2456c&link_type=abstract
Journal of Geophysical Research, vol. 88, Mar. 10, 1983, p. 2456-2474.
Mathematics
Logic
104
Mars, Ice, Equatorial Regions, Atmosphere, Water, Temperature, Morphology, History, Climate, Hypotheses, Models, Distribution, Structure, Regolith, Procedure, Parameters, Porosity, Analysis, Thermal Effects, Gradients, Absorption, Carbon Dioxide, Soils
Scientific paper
The lifetime of an unreplenished layer of ground ice lying within 30 deg of the Martian equator was examined within the context of the existing data base on Martian regolith and climate. Data on the partial pressure of H2O in the Martian atmosphere and the range of mean annual temperatures indicated the ground ice would be restricted to latitudes poleward of 40 deg. However, the ground ice near the poles may be a relic from early Martian geologic times held in place by a thin layer of regolith. Consideration of twelve model pore size distributions, similar to silt- and clay-type earth soils, was combined with a parallel pore model of gaseous diffusion to calculate the flux of H2O molecules escaping from the subsurface ground ice layer. Martian equatorial ground ice was found to be influenced by the soil structure, the magnitude of the geothermal gradient, the climatic desorption of CO2 from the regolith. It is concluded that equatorial ground ice is present on Mars only if a process of replenishment is active.
Clifford Stephen M.
Hillel Daniel
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