Day and night models of the Venus thermosphere

Details Day and night models of the Venus thermosphere Day and night models of the Venus thermosphere

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.3955m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, May 1, 1983, p. 3955-3969.

Physics

29

Atmospheric Chemistry, Atmospheric Composition, Atmospheric Models, Planetology, Thermosphere, Venus Atmosphere, Atmospheric Circulation, Atmospheric Density, Carbon Dioxide, Chemical Reactions, Diurnal Variations, Planetary Ionospheres, Temperature Distribution, Venus, Thermosphere, Models, Atmosphere, Altitude, Gases, Density, Ionosphere, Chemistry, Transport, Diffusion, Photochemistry, Dissociation, Ionization, Circulation, Flux, Airglow, Homopause

Scientific paper

A model atmosphere of Venus for altitudes between 100 and 178 km is presented for the dayside and nightside. Densities of CO2, CO, O, N2, He, and O2 on the dayside, for 0800 and 1600 hours local time, are obtained by simultaneous solution of continuity equations. These equations couple ionospheric and neutral chemistry and the transport processes of molecular and eddy diffusion. Photodissociation and photoionization J coefficients are presented to facilitate the incorporation of chemistry into circulation models of the Venus atmosphere. Midnight densities of CO2 CO, O, N2, He, and N are derived from integration of the continuity equations, subject to specified fluxes. The nightside densities and fluxes are consistent with the observed airglow of NO and O2(1 Delta). The homopause of Venus is located near 133 km on both the dayside and nightside.

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