Solar heating of suspended particles and the dynamics of Martian dust devils

Details Solar heating of suspended particles and the dynamics of Martian dust devils Solar heating of suspended particles and the dynamics of Martian dust devils

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3319s03f&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 19, CiteID L19S03

Physics

4

Atmospheric Composition And Structure: Cloud/Radiation Interaction, Atmospheric Composition And Structure: Planetary Atmospheres (5210, 5405, 5704), Atmospheric Processes: Convective Processes, Atmospheric Processes: Clouds And Aerosols

Scientific paper

The heat input to Martian dust devils due to solar warming of suspended particles is assessed based on a prior estimate of dust loading and from an analysis of shadows cast by dust devils in images taken from orbit. Estimated values for solar heating range from 0.12 to 0.57 W/m3 with associated temperature increases of 0.011 to 0.051°C per second. These warming rates are comparable to the adiabatic cooling rate expected for a gas parcel rising on Mars with a vertical velocity of 10 m/s. Solar warming of suspended dust serves to maintain buoyancy in a rising dust plume and may be one cause for the large scale of dust devils observed on Mars.

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