Mars - Northern summer ice CAP - Water vapor observations from Viking 2

Details Mars - Northern summer ice CAP - Water vapor observations from Viking 2 Mars - Northern summer ice CAP - Water vapor observations from Viking 2

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sci...194.1339f&link_type=abstract

Science, vol. 194, Dec. 17, 1976, p. 1339-1341.

Computer Science

16

Abundance, Atmospheric Moisture, Mars Atmosphere, Polar Caps, Viking Orbiter 2, Water Vapor, Atmospheric Temperature, Carbon Dioxide, Ice Environments, Northern Hemisphere, Solstices, Summer

Scientific paper

Observations of the latitude dependence of water vapor made from the Viking 2 orbiter show peak abundances in the latitude band 70 to 80 deg N in the northern midsummer season (planetocentric longitude about 108 deg). Total column abundances in the polar regions require near-surface atmospheric temperatures in excess of 200 K and are incompatible with the survival of a frozen carbon dioxide cap at Martian pressures. The remnant (or residual) north polar cap and the outlying patches of ice at lower latitudes are thus predominantly water ice, whose thickness can be estimated to be between 1 meter and 1 kilometer.

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