A two-dimensional model of the ionosphere of Venus

Details A two-dimensional model of the ionosphere of Venus A two-dimensional model of the ionosphere of Venus

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.5595c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, July 1, 1983, p. 5595-5606.

Physics

62

Atmospheric Models, Planetary Ionospheres, Two Dimensional Models, Venus Atmosphere, Atmospheric Chemistry, Electron Precipitation, Ionospheric Electron Density, Ionospheric Ion Density, Night, Pioneer Venus 1 Spacecraft, Venus, Models, Ionosphere, Nightside, Pioneer Venus, Orbiters, Pvo, Solar Wind, Pressure, Plasma, Velocity, Transport, Parameters, Flow, Electrons, Precipitation, Deuterium, Hydrogen, Element Ratios

Scientific paper

While most orbits of the Pioneer Venus Orbiter have indicated a substantial nightside ionosphere, this region virtually disappears, existing only as irregular patches of low density plasma, on those orbits during which the solar wind dynamic pressure is large. There observational results are presently interpreted by means of a two-dimensional theoretical model of the Venus ionosphere in which empirical horizontal velocities are adopted. The degree to which the horizontal transport of ions from day to night can maintain the nightside ionosphere is shown to depend on the flow velocities, together with the ionopause height at the terminator. Attention is also given to the role played by electron precipitation in the support of a nightside ionosphere. Indirect evidence is given for an enhanced deuterium/hydrogen ratio on Venus.

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