The role of water ice clouds in the Martian hydrologic cycle

Details The role of water ice clouds in the Martian hydrologic cycle The role of water ice clouds in the Martian hydrologic cycle

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.1439j&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Feb. 10, 1990, p. 1439-1445.

Mathematics

Logic

11

Hydrological Cycle, Ice Clouds, Mars Atmosphere, Water Vapor, Annual Variations, Carbon Dioxide, Frost, Ground Water, Mars, Water Ice, Clouds, Cycles, Hydrology, Seasonal Variations, Ice, Water, Transport, Water Vapor, Polar Caps, Carbon Dioxide, Simulations, Spacecraft Observations, Viking Missions, Mawd Instrument, Distribution, Models

Scientific paper

A one-dimensional model for the seasonal cycle of water on Mars has been used to investigate the direction of the net annual transport of water on the planet and to study the possible role of water ice clouds, which are included as an independent phase in addition to ground ice and water vapor, in the cycle. The calculated seasonal and spatial patterns of occurrence of water ice clouds are qualitatively similar to the observed polar hoods, suggesting that these polar clouds are, in fact, an important component of water cycle. A residual dry ice in the south acts as a cold trap which, in the absence of sources other than the caps, will ultimately attract the water ice from the north cap; however, in the presence of a source of water in northern midlatitudes during spring, it is possible that the observed distribution of vapor and ice can be in a steady state even if a residual CO2 cap is a permanent feature of the system.

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