Physics
Scientific paper
Oct 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aps..osf..ba01f&link_type=abstract
American Physical Society, Ohio Section Fall Meeting, October 8-9, 1999 Wright State University/Air Force Institute of Technolog
Physics
Scientific paper
Atomic carbon may escape from the atmosphere of Mars by a number of non-thermal mechanisms, which may be photochemical or mechanical processes, such as sputtering. We present model calculations of the escape rate of C by the photochemical escape mechanisms, including dissociative recombination of CO^+, photodissociation and photodissociative ionization of CO, electron impact dissociation and dissociative ionization of CO, and a few chemical reactions. Our background model is based on the MTGCM model of Bougher and co-workers, and the solar fluxes are from the solar flux model of Ayres. We find that the most important escape mechanism is dissociative recombination of CO^+, but photodissociation may also make a signficant contribution if the mixing ratio of CO is larger at high solar activity than at low solar activity.
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