Injection of dust into the Martian atmosphere - Evidence from the Viking Gas Exchange experiment

Details Injection of dust into the Martian atmosphere - Evidence from the Viking Gas Exchange experiment Injection of dust into the Martian atmosphere - Evidence from the Viking Gas Exchange experiment

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...68...99h&link_type=abstract

Icarus (ISSN 0019-1035), vol. 68, Oct. 1986, p. 99-119.

Computer Science

5

Dust Storms, Mars Atmosphere, Gas Exchange, Ice, Magnesium, Moisture Content, Regolith, Soils, Viking Lander Spacecraft, Mars, Injection, Atmosphere, Viking Missions, Spacecraft Observations, Dust, Dust Storms, Freezing, Thawing, Humidity, Porosity, Depth, Hypotheses, Velocity, Laboratory Studies, Simulations, Experiments, Comparisons, Desorption, Ge Experiment, Regolith, Soil, Calculations, Diurnal Variations, Seasonal Variations, Water, Aerosols, Hydrogen Chloride, Sulfuric Acid

Scientific paper

The hypothesis that predawn midlatitude storms are triggered by a soil humidification process is examined. A freeze/thaw model of the process is evaluated in the Viking Gas Exchange experiments conducted on Mars. The humidification-driven desorption and desiccation state of Martian soil samples are analyzed. The periodic humidification of equatorial regolith soil is studied in terms of pore space pressure during desorption events and soil diffusivity; the thermal properties of the regolith surface layer are modeled using the program of Clifford (1984). Consideration is given to the diurnal and seasonal cycles of the humidification process, the permanent, low-albedo features in the midlatitudes, and the production of H2SO4 and HCl aerosols.

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