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Electrical discharges and broadband radio emission by Martian dust devils and dust storms
 

Summary: Electrical discharges and broadband radio emission by Martian dust
devils and dust storms
Nilton O. Renno, Ah-San Wong, and Sushil K. Atreya
Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan, USA
Imke de Pater
Department of Astronomy, University of California, Berkeley, California, USA
Maarten Roos-Serote
Lisbon Astronomical Observatory, Tapada da Ajuda, Lisbon, Portugal
Received 2 June 2003; revised 7 September 2003; accepted 16 October 2003; published 19 November 2003.
[1] 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. Similar
phenomena are expected to be ubiquitous on Mars,
because Martian dust devils and dust storms are
larger, stronger 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 observational evidence

  

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

 

Collections: Physics