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ELECTRICAL DISCHARGES IN THE MARTIAN DUST DEVILS AND DUST STORMS. N. O. Renno, A. S. Wong, and S. K. Atreya, Department of Atmospheric, Oceanic and Space Sciences, University of Michigan,
 

Summary: ELECTRICAL DISCHARGES IN THE MARTIAN DUST DEVILS AND DUST STORMS. N. O. Renno,
A. S. Wong, and S. K. Atreya, Department of Atmospheric, Oceanic and Space Sciences, University of Michigan,
Ann Arbor, MI 48109-2143 (nrenno@umich.edu).
Introduction: The Mars Global Surveyor Mars
Orbiter Camera (MOC) shows that aeolian processes
have been actively modifying the surface of Mars [1].
The evidence of these processes in the form of wind
erosion features, dust devils, and dust storms is abun-
dant and visible even in images of the MOC wide-
angle camera. Dust devils are ubiquitous features of
terrestrial deserts and the martian landscape during the
warm season. On Mars, dust devils are much larger
and stronger than on Earth. Terrestrial dust devils
have typical diameters of less than 10 m and are sel-
dom higher than a few 100 m [2]. In contrast, dust
devils with diameters between 100 m and 1 km, and
heights of up to 7 km are frequently observed on Mars
[1, 3]. Martian dust devils also have greater dust con-
tent than the terrestrial vortices. The dust devils ob-
served in the images of the Mars Pathfinder panoramic

  

Source: Atreya, Sushil - Department of Atmospheric, Oceanic and Space Science, University of Michigan

 

Collections: Physics