Comparison of ground-based and Viking Orbiter measurements of Martian water vapor - Variability of the seasonal cycle

Details Comparison of ground-based and Viking Orbiter measurements of Martian water vapor - Variability of the seasonal cycle Comparison of ground-based and Viking Orbiter measurements of Martian water vapor - Variability of the seasonal cycle

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984icar...57..322j&link_type=abstract

Icarus (ISSN 0019-1035), vol. 57, March 1984, p. 322-334.

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67

Annual Variations, Atmospheric Moisture, Mars Atmosphere, Space Observations (From Earth), Viking Orbiter Spacecraft, Abundance, Carbon Dioxide, Water Vapor, Mars, Earth-Based Observations, Viking Missions, Orbiters, Water, Vapor, Seasonal Variations, Mars Atmospheric Water Detection Experiment, Climate, Comparisons, Sublimation, Polar Regions, Carbon Dioxide, Ice, Mawd, Data, Abundance

Scientific paper

Earth-based observations of Mars atmospheric water vapor are presented for the 1975-1976, 1977-1978, and 1983 apparitions. Comparisons are made with near-simultaneous spacecraft measurements made from the Viking Orbiter Mars Atmospheric Water Detection experiment during 1976-1978 and with previous earth-based measurements. Differences occur between the behavior in the different years, and may be related to the Mars climate. Measurements during the southern summer in 1969 indicate a factor of three times as much water as is present at this same season in other years. This difference may have resulted from the sublimation of water from the south polar residual cap upon removal of most or all of the CO2 ice present; sublimation of all of the CO2 ice during some years could be a result of a greater thermal load being placed on the cap due to the presence of differing amounts of atmospheric dust.

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