Physics
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.3297f&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. E2, p. 3297-3310.
Physics
67
Atmospheric Chemistry, Atmospheric Models, Mars Atmosphere, Nitrogen Atoms, Planetary Ionospheres, Atmospheric Physics, Thermosphere, Mars, Nitrogen, Escape, Origin, Formation, Production Rate, Density, Atmosphere, Thermal Effects, Temperature, Flux, Photodissociation, Ionization, Models, Comparisons, Chemistry, Isotopic Ratios, Altitude, Parameters, Molecular Processes, Ions, Ionosphere, Thermosphere, Electrons, Nitric Oxide, Nitrogen 14, Carbon Dioxide
Scientific paper
Updated rate coefficients and a revised ionosphere-thermosphere model are used to compute the production rates and densities of odd nitrogen species in the Martian atmosphere. Computed density profiles for N(4S), N(2D), N(2P), and NO are presented. The model NO densities are found to be about a factor of 2-3 less than those measured by the Viking 1 mass spectrometer. Revised values for the escape rates of N atoms from dissociative recombination and ionospheric reactions are also computed. Dissociative recombination is found to be comparable in importance to photodissociation at low solar activity, but it is still the most important escape mechanism for N-14 at high solar activity.
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