Physics – Geophysics
Scientific paper
Sep 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006rvgeo..44.3003b&link_type=abstract
Reviews of Geophysics, Volume 44, Issue 3, CiteID RG3003
Physics
Geophysics
34
Planetary Sciences: Solid Surface Planets: Meteorology (3346), Atmospheric Processes: Land/Atmosphere Interactions (1218, 1631, 1843), Atmospheric Processes: Planetary Meteorology (5445, 5739), Atmospheric Processes: Boundary Layer Processes, Planetary Sciences: Solar System Objects: Mars
Scientific paper
Dust devils, particle-loaded vertical convective vortices found on both Earth and Mars, are characterized by high rotating wind speeds, significant electrostatic fields, and reduced pressure and enhanced temperature at their centers. On Earth they are subordinate to boundary layer winds in the dust cycle and, except possibly in arid regions, are only ``nuisance-level'' phenomena. On Mars, though, they seem to support the persistent background atmospheric haze, to influence the surface albedo through the formation of ``tracks'' on the surface, and to possibly endanger future exploration because of their high dust load and large potential gradients. High-resolution numerical simulations and thermophysical scaling models successfully describe dust devil-like vortices on Mars, but fitting dust devil action into the Martian global dust cycle is still problematic. Reliable parameterizations of their erosional abilities and solid temporal and spatial distribution data are still required to build and test a complete model of dust devil action.
Balme Matt
Greeley Ronald
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