Thermal and albedo mapping of the polar regions of Mars using Viking thermal mapper observations: 1. North polar region

Details Thermal and albedo mapping of the polar regions of Mars using Viking thermal mapper observations: 1. North polar region Thermal and albedo mapping of the polar regions of Mars using Viking thermal mapper observations: 1. North polar region

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....9925959p&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. E12, p. 25959-25991

Physics

74

Albedo, Infrared Imagery, Mapping, Mars Surface, Northern Hemisphere, Polar Regions, Temperature Distribution, Brightness Temperature, Diurnal Variations, Mathematical Models, Spatial Resolution, Surface Temperature, Viking Spacecraft

Scientific paper

We present the first maps of the apparent thermal inertia and albedo of the north polar region of Mars. The observations used to create these maps were acquired by the infrared thermal mapper (IRTM) instruments on the two Viking orbiters over a 50-day period in 1978 during the Martian early northern summer season. The maps cover the region from 60 deg N to the north pole at a spatial resolution of 1/2 deg of latitude. The analysis and interpretation of these maps is aided by the results of a one-dimensional radiative convective model, which is used to calculate diurnal variations in surface and atmospheric temperatures, and brightness temperatures at the top of the atmosphere for a wide range of assumptions concerning aerosol optical properties and aerosol optical depths. The results of these calculations show that the effects of the Martian atmosphere on remote determinations of surface thermal inertia are more significant than have been indicated in previous studies. The maps of apparent thermal inertia and albedo show a great deal of spatial structure that is well correlated with surface features.

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