Generation of liquid water on Mars through the melting of a dusty snowpack

Details Generation of liquid water on Mars through the melting of a dusty snowpack Generation of liquid water on Mars through the melting of a dusty snowpack

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...72...95c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 72, Oct. 1987, p. 95-127.

Computer Science

74

Dust, Mars Surface, Planetary Evolution, Snow, Water, Annual Variations, Canals, Insolation, Planetary Temperature, Radiative Heat Transfer, Mars, Water, Melting, Snow, Origin, Formation, Source, Models, Dust, Latitude, Heating, Solar Radiation, Absorption, Depth, Concentration, Size, Ice, Grains, Conductivity, Thermal Effects, Temperature, Density, Pressure, Parameters, Photographs, Calculations, Radiative Processes, Seasonal Variations, Diagrams

Scientific paper

An optical/thermal model for dusty snowpacks at temperate Martian latitudes is used to investigate the possibility of valley network formation by liquid water that was provided by snowmelts, assuming insolation absorption under clear-sky conditions. The mean-annual surface temperatures for snow and the atmospheric exchange terms of the surface energy balance are constrained by global climate model results. Under favorable conditions, liquid water is generated at atmospheric pressures as low as 30-100 mbar, provided that the substrate is composed of regolith; this condition is in keeping with the cratered terrain expected in an ancient Martian surface.

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