A model of the neutral and ion nitrogen chemistry in the daytime thermosphere of Venus

Physics

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Atmospheric Composition, Density Distribution, Nitric Oxide, Nitrogen Atoms, Nitrogen Ions, Thermosphere, Venus Atmosphere, Atmospheric Chemistry, Atmospheric Models, Daytime, Ion Density (Concentration), Molecular Ions, Positive Ions, Vertical Distribution, Venus, Thermosphere, Chemistry, Nitrogen, Ions, Models, Density, Atmosphere, Temperatures, Flux, Ionization, Pioneer Venus, Eddy Coefficients, Equipment, Altitude, Nitric Oxide, Ionosphere, Vertical Transport

Scientific paper

Density profiles of N(4S), NO, N(2D), NO(+), and N(+) are calculated for the thermosphere of Venus. The results show that N(4S) is the dominant odd nitrogen species throughout the thermosphere and has a maximum density of 18 million atoms/cu cm at 132 km. The calculated NO(+) density agrees well with recent Pioneer Venus measurements, but the calculated N(+) densities are a factor of two to five less than the measurements. The production of N(4S) atoms generated in the model is adequate to explain recent measurements of the nitric oxide chemiluminescent emission on the night side of Venus.

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