Recessions of the south polar CAP of Mars in 1986 and 1988

Details Recessions of the south polar CAP of Mars in 1986 and 1988 Recessions of the south polar CAP of Mars in 1986 and 1988

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jalpo..34..116c&link_type=abstract

Association of Lunar and Planetary Observers, Journal (ISSN 0039-2502), vol. 34, July 1990, p. 116-122.

Physics

Mars (Planet), Polar Caps, Annual Variations, Telescopes, Viking Orbiter 2

Scientific paper

The recessions in latitude of the edge of the Martian south polar cap (SPC) in 1986 and 1988, as measured by ALPO members using Newtonian telescopes with filar and reticle micrometers, exhibited a near-linear retreat of 6.2 sols (Martian solar days) per degree of latitude from early southern spring at Ls (planetocentric solar longitude) 185 deg through early summer to Ls 285 deg in 1986; and 6.7 sols per degree from Ls 183 to 290 deg in 1988. The SPC in both recessions was observed to retreat from about -60 to -86 deg latitude, with a 98-percent areal reduction from 9.66 to 0.18 million sq km.

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