Martian south polar CAP 1988

Details Martian south polar CAP 1988 Martian south polar CAP 1988

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9514751i&link_type=abstract

(American Geophysical Union and Geological Society of America, International Conference on Mars, 4th, Tucson, AZ, Jan. 10-13, 19

Mathematics

Logic

6

Mars Atmosphere, Mars Photographs, Polar Caps, Dust Storms, Mars Surface, Regression Analysis, Solar Radiation

Scientific paper

The regression of the Martian south polar cap during the 1988 apparition is examined with the measurements of the photographs of Mars obtained at the Bosscha Observatory, at the Hida Observatory, and at the Kwasan Observatory. Around Ls = 230 deg, the regression of the south polar cap in 1988 appears similar to those in other years. After Ls = 240 deg the regression of the south polar cap in 1988 seems slower than those in 1956, in 1971, in 1973, or in 1977. However, in the period Ls = 240 deg-250 deg, it seems faster than that in 1939 which is the slowest reported or than that in 1986 which is also very slow. The 1988 regression seems to be one of the slowest in the period Ls = 240 deg-290 deg. Like the case of the south cap in 1986, the regression of the south polar cap in 1988 supports interannual difference of the regression of the south polar cap. The data from 1988 also support the proposition that the size of the south polar cap around Ls = 250 deg becomes large in the year when global dust storms do not occur.

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