Sublimation and transport of water from the north residual polar CAP on Mars

Details Sublimation and transport of water from the north residual polar CAP on Mars Sublimation and transport of water from the north residual polar CAP on Mars

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.1423h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Feb. 10, 1990, p. 1423-1437. Research supported by NASA.

Other

69

Mars Atmosphere, Polar Caps, Satellite Observation, Transport Properties, Water Vapor, Carbon Dioxide, Mars Surface, Sublimation, Viking Spacecraft, Mars, Sublimation, Transport, Water, Polar Regions, Polar Caps, Dust, Mawd Instrument, Viking Missions, Spacecraft Observations, Atmosphere, Cycles, Seasonal Variations, Simulations, Circulation, Models, Source, Regolith, Abundance, Calculations, Dynamics, Irtm Instrument, Procedure, Water Vapor, Comparisons, Mixing, Precipitation, Topography

Scientific paper

The possible role of the north residual cap in the current Martian water cycle was examined using models to assess the ability of the cap to supply water to the atmosphere and the ability of the atmospheric circulation to transport it out of the polar regions to low northern latitudes. Results indicate that rather extreme circumstances would be required for the cap to provide all of the observed increase in atmospheric water, such as a combination of high surface winds, low cap emissivities, or substantial evaporation from dark material. But even if these conditions could be met, the high-latitude circulation is too localized in scale to move much water vapor out of the polar environment. Both the present calculations and the data from the Viking's Mars Atmospheric Water Detection Experiment show that about two thirds of the water appearing in the Martian northern hemisphere during summer must be supplied by other sources. It is suggested that the additional source is water desorbing from the nonpolar regolith.

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