Physics
Scientific paper
Jul 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.7611c&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, July 10, 1988, p. 7611-7624.
Physics
78
Albedo, Mars Surface, Viking Mars Program, Wind Effects, Wind Erosion, Atmospheric Circulation, Dust Storms, Infrared Imagery, Northern Hemisphere, Southern Hemisphere, Thermal Mapping
Scientific paper
This paper describes the use of visible reflectance observations by the Viking IR thermal mapper for the construction of the time sequence of the Martian surface and atmospheric albedo throughout the Viking mission. The major variations in albedo were found to be associated with the two global dust storms of 1977. Visible albedo observations provided an excellent means for determining the onset and decay phases of the two storms, separating the surface and the atmospheric dust. Even at the height of the second storm some surface features were visible, particularly in the southern hemisphere. Significant differences were observed between the northern and the southern hemispheres in the dust load and the timing of the decay phase of the global storms. At the present time, there appears to be a net transport of dust from south to north, which is consistent with models of atmospheric circulation during the storm period.
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