Sunlight penetration through the Martian polar caps: Effects on the thermal and frost budgets

Details Sunlight penetration through the Martian polar caps: Effects on the thermal and frost budgets Sunlight penetration through the Martian polar caps: Effects on the thermal and frost budgets

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992rmus.nasau....l&link_type=abstract

In its Reanalysis of Mariner 9 UV Spectrometer Data for Ozone, Cloud, and Dust Abundances, and Their Interaction Over Climate Ti

Physics

Carbon Dioxide, Dichotomies, Energy Budgets, Frost, Ice, Mars Surface, Penetration, Polar Caps, Solar Radiation, Sunlight, Surface Temperature, Depth, Dust, Sublimation

Scientific paper

An energy balance model of the seasonal polar caps on Mars is modified to include penetration of solar radiation into and through the ice. Penetration of solar radiation has no effect on subsurface temperature or total frost sublimation if seasonal ice overlies a dust surface. An effect is noted for seasonal ice which overlies the residual polar caps. For the case of an exposed water-ice residual polar cap, the temperature at depth is calculated to be up to several degrees warmer and the calculated lifetime of seasonal CO2 frost is slightly lower when penetration of sunlight is properly treated in the model. For the case of a residual polar cap which is perennially covered by CO2 frost, the calculated lifetime of seasonal CO2 frost is very slightly increased as a result of sunlight penetration through the ice. Hence, penetration of sunlight into the ice helps to stabilize the observed dichotomy in the residual polar caps on Mars, although it is a small effect.

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