Other
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977p%26ss...25..921s&link_type=abstract
Planetary and Space Science, vol. 25, Oct. 1977, p. 921-930.
Other
1
Ionospheric Composition, Planetary Ionospheres, Plasma Dynamics, Transport Properties, Venus Atmosphere, Atmospheric Models, Diurnal Variations, Electron Density Profiles, Ion Density (Concentration), Ion Temperature, Mariner 10 Space Probe, Mariner 5 Space Probe, Temperature Gradients
Scientific paper
The extent to which certain transport processes affect ion composition and heat flow in the daytime, topside Venus ionosphere was studied. Particular attention is given to the conditions that prevailed during the Mariner 5 measurements, at which time the topside Venus ionosphere appeared to be in a state of diffusive equilibrium. The ion composition is sensitive to the ion temperature, the ion temperature gradient, and to relative drifts between the ion species of a few m/sec. The electron density, on the other hand, is very insensitive to these parameters. As a consequence, ionospheric models of the topside Venus ionosphere are not likely to yield definitive information about the ion composition, the thermal structure or the flow conditions, since at present only electron density profiles are available for testing model predictions. A relative drift between the ion species of a few m/sec induces an ion heat flow that is equivalent to a 1 K/km temperature gradient.
Saint-Maurice J.-P.
Schunk Robert W.
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