Martian north polar CAP and circumpolar clouds - 1975-1980 telescopic observations

Details Martian north polar CAP and circumpolar clouds - 1975-1980 telescopic observations Martian north polar CAP and circumpolar clouds - 1975-1980 telescopic observations

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...71..306j&link_type=abstract

(NASA, Lunar and Planetary Institute, and National Air and Space Museum, MECA Conference on Mars: The Evolution of Its Climate a

Computer Science

17

Mars Atmosphere, Mars Surface, Polar Caps, Space Observations (From Earth), Northern Hemisphere, Tables (Data), Viking Mars Program, Wind (Meteorology), Mars, Polar Regions, Ice Caps, Clouds, Telescope Methods, Analysis, Earth-Based Observations, Seasonal Variations, Sublimation, Longitude

Scientific paper

Observational data on the late-winter/spring sublimation and recession of the north polar cap of Mars are analyzed statistically. Ground-based photographic data obtained by the International Planetary Patrol during the oppositions of 1975, 1978, and 1980 are compiled in tables and graphs, and Viking data from the 1977-1978 and 1980 recessions are included for comparison. The results indicate that the recession of the cap from its maximum extent (near 55 deg N) reaches a plateau during midspring. The end of this plateau is associated with (1) a sharp increase in circumpolar cloud cover (suggesting that the cap is the water source) and (2) a probable reversal of the northern-hemisphere meridional wind (as observed by Kahn, 1983).

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