Analysis of Viking infrared thermal mapping data of Mars. The effects of non-ideal surfaces on the derived thermal properties of Mars

Details Analysis of Viking infrared thermal mapping data of Mars. The effects of non-ideal surfaces on the derived thermal properties of Mars Analysis of Viking infrared thermal mapping data of Mars. The effects of non-ideal surfaces on the derived thermal properties of Mars

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979cait.reptq....m&link_type=abstract

Final Technical Report, 1 Oct. 1978 - 30 Sep. 1979 California Inst. of Tech., Pasadena. Div. of Geological and Planetary Science

Mathematics

Logic

Brightness Temperature, Infrared Imagery, Mars Surface, Surface Properties, Surface Temperature, Thermal Mapping, Diurnal Variations, Histograms, Mars Atmosphere, Thermodynamic Properties, Viking Mars Program

Scientific paper

The thermal interia of the surface of Mars varies spatially by a factor of eight. This is attributable to changes in the average particle size of the fine material, the surface elevation, the atmospheric opacity due to dust, and the fraction of the surface covered by rocks and fine material. The effects of these non-ideal properties on the surface temperatures and derived thermal inertias are modeled, along with the the effects of slopes, CO2 condensed onto the surface, and layering of fine material upon solid rock. The non-ideal models are capable of producing thermal behavior similar to that observed by the Viking Infrared Thermal Mapper, including a morning delay in the post-dawn temperature rise and an enhanced cooling in the afternoon relative to any ideal, homogeneous model. The enhanced afternoon cooling observed at the Viking-1 landing site is reproduced by the non-ideal models while that atop Arsia Mons volcano is not, but may be attributed to the observing geometry.

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