The Effect of Strong Electric Fields on Lifting of Soil Particles During Saltation

Details The Effect of Strong Electric Fields on Lifting of Soil Particles During Saltation The Effect of Strong Electric Fields on Lifting of Soil Particles During Saltation

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufm.p22b..07k&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #P22B-07

Physics

0305 Aerosols And Particles (0345, 4801, 4906), 0345 Pollution: Urban And Regional (0305, 0478, 4251), 3307 Boundary Layer Processes, 6225 Mars

Scientific paper

Electric fields in excess of 100 kV/m have been measured in dust devils and dust storms. These strong electric fields induce charges at the surface, resulting in upward electric forces that aid the lifting of soil particles. We present measurements that show that electric forces in dust devils and dust storms can be strong enough to substantially reduce the friction velocity needed to aerodynamically lift sand particles. We show that electrical forces can even be large enough to directly scavenge dust and sand particles off the surface. Thus, electric fields might be partially responsible for the large dust lifting capacity of dust devils.

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