Ionization of the Venusian atmosphere from solar and galactic cosmic rays

Nordheim, T.A., Dartnell, L., Desorgher, L., Coates, A.J. and Jones, G.H. 2015. Ionization of the Venusian atmosphere from solar and galactic cosmic rays. Icarus. 245, pp. 80-86. https://doi.org/10.1016/j.icarus.2014.09.032

TitleIonization of the Venusian atmosphere from solar and galactic cosmic rays
TypeJournal article
AuthorsNordheim, T.A.
Dartnell, L.
Desorgher, L.
Coates, A.J.
Jones, G.H.
Abstract

The atmospheres of the terrestrial planets are exposed to solar and galactic cosmic rays, the most energetic of which are capable of affecting deep atmospheric layers through extensive nuclear and electromagnetic particle cascades. In the venusian atmosphere, cosmic rays are expected to be the dominant ionization source below ∼100 km altitude. While previous studies have considered the effect of cosmic ray ionization using approximate transport methods, we have for the first time performed full 3D Monte Carlo modeling of cosmic ray interaction with the venusian atmosphere, including the contribution of high-Z cosmic ray ions (Z = 1–28). Our predictions are similar to those of previous studies at the ionization peak near 63 km altitude, but are significantly different to these both above and below this altitude. The rate of atmospheric ionization is a fundamental atmospheric property and the results of this study have wide-reaching applications in topics including atmospheric electrical processes, cloud microphysics and atmospheric chemistry.

JournalIcarus
Journal citation245, pp. 80-86
ISSN0019-1035
Year2015
PublisherElsevier
Publisher's version
Digital Object Identifier (DOI)https://doi.org/10.1016/j.icarus.2014.09.032
Publication dates
Published online23 Sep 2014
Published in print01 Jan 2015
LicenseCC BY 3.0

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