Electrical Discharges and Broadband Radio Emission by Martian Dust Devils and Dust Storms

Details Electrical Discharges and Broadband Radio Emission by Martian Dust Devils and Dust Storms Electrical Discharges and Broadband Radio Emission by Martian Dust Devils and Dust Storms

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufm.p51c0459r&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #P51C-0459

Physics

3304 Atmospheric Electricity

Scientific paper

Triboelectric charging of saltating and colliding sand and dust particles produces strong electric fields in terrestrial dust devils and dust storms. Acceleration of the charged particles, as well as microdischarges between them, generates wideband electromagnetic radiation that may be easily detected by properly designed radio receivers. Similar phenomena are expected to be ubiquitous on Mars, because Martian dust devils and dust storms are larger, stronger, dustier and more frequent than their terrestrial analogues, and electrical discharges occur at a much lower potential gradient in the thin Martian atmosphere. We present theoretical arguments and show observational evidence that Martian dust events produce nonthermal wideband electromagnetic radiation that is strong enough to be detected from Earth.

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