Color and albedo of the south polar layered deposits on Mars

Details Color and albedo of the south polar layered deposits on Mars Color and albedo of the south polar layered deposits on Mars

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.1343h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Feb. 10, 1990, p. 1343-1358.

Mathematics

Logic

35

Albedo, Color, Geological Surveys, Mars Atmosphere, Mars Surface, Polar Regions, Planetary Geology, Planetary Mapping, Viking Orbiter Spacecraft, Mars, Color, Albedo, Polar Regions, Optical Properties, Deposits, Ice, Frost, Atmosphere, Scattering, Dust, Brightness, Layers, Composition, Mapping, Procedure, Photographs, Viking 2 Mission, Orbiters, Mixing, Maps, Sand, Climate, Erosion, Deposition, Eolian Processes

Scientific paper

Five color/albedo units, including polar frost, have been recognized and mapped in the southern layered deposits on Mars. Atmospheric dust scattering was measured in shadows and modeled in order to remove the component of brightness in Mars images due to the atmosphere and quantify the albedo and color of the surface. The layered deposits appear to be mantled by red dust, except where eolian stripping has exposed the underlying bedrock. Dark material has been deposited in topographic depressions in much of the south polar region, including the layered deposits. The available observational data suggest that the layered deposits are composed of bright dust, ice, and a small amount of dark material. If the dark material is sand, a periodic change in polar winds seems required in order to transport the sand poleward into the layered terrain. In any case, the observations are not consistent with the layered deposits being composed only of bright dust and ice.

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