Physics
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992icar...99....1w&link_type=abstract
Icarus (ISSN 0019-1035), vol. 99, no. 1, p. 1-27.
Physics
28
Annual Variations, Atmospheric Models, Atmospheric Pressure, Carbon Dioxide Concentration, Mars Atmosphere, Polar Caps, Albedo, Conductive Heat Transfer, Diurnal Variations, Emissivity, Viking Lander Spacecraft
Scientific paper
The present diurnal and seasonal thermal model for Mars, in which surface CO2 frost condensation and sublimation are determined by the net effects of radiation, latent heat, and heat conduction in subsurface soil layers, in order to simulate seasonal exchanges of CO2 between the polar caps and atmosphere, successfully reproduces the measured pressured variations at the Viking Lander 1 site. In the second part of this work, the year-to-year differences between measured surface pressures at Viking sites as a function of season are used as upper limits on the potential magnitudes of interannual variations in the Martian atmosphere's mass. Simulations indicate that the dust layers deposited onto the condensing north seasonal polar cap during dust storms can darken seasonal frost deposits upon their springtime uncovering, while having little effect on seasonal pressure variations.
Paige David A.
Wood Stephen E.
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