Physics – Atmospheric and Oceanic Physics
Scientific paper
2009-01-23
Kok, J. F., and N. O. Renno, Geophys. Res. Lett., 36, L05202 (2009)
Physics
Atmospheric and Oceanic Physics
5 journal pages, 3 figures, published in Geophysical Research Letters
Scientific paper
10.1029/2008GL036691
Wind-blown sand, or 'saltation,' creates sand dunes, erodes geological features, and could be a significant source of dust aerosols on Mars. Moreover, the electrification of sand and dust in saltation, dust storms, and dust devils could produce electric discharges and affect atmospheric chemistry. We present the first calculations of electric fields in martian saltation, using a numerical model of saltation that includes sand electrification, plasma physics, and the adsorption of ions and electrons onto particulates. Our results indicate that electric discharges do not occur in martian saltation. Moreover, we find that the production of hydrogen peroxide and the dissociation of methane by electric fields are less significant than previously thought. Both these species are highly relevant to studies of past and present life on Mars.
Kok Jasper F.
Renno Nilton O.
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