The upper ionospheres of Jupiter and Saturn

Details The upper ionospheres of Jupiter and Saturn The upper ionospheres of Jupiter and Saturn

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39.1715m&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 39, Dec. 1991, p. 1715-1732. Research supported by Institute of Space and Ter

Physics

42

Atmospheric Chemistry, Jupiter Atmosphere, Saturn Atmosphere, Upper Ionosphere, Atmospheric Ionization, Atmospheric Models, Ion Recombination, Ionospheric Electron Density, Photoionization, Voyager Project

Scientific paper

The electron-density profiles of Jupiter's and Saturn's ionospheres are modeled with a 1D chemical diffusive model incorporating measured parameters of the neutral atmospheric structure. The Voyager RSS ion-density data are modeled by accounting for ion chemistry, the H3(+) recombination-rate coefficient, and H2O chemistry. Electron-density peaks for both ionospheres are 900-1000 km lower in the model than the measured values, and the role of vibrational excitation of H2 is discussed in converting H(+) to H2(+) and H3(+). Vertical ion flow is also considered which can maintain the plasma peaks under the conditions of electrical fields or horizontal neutral winds. An assumed influx of H2O molecules of a specific quantity is theorized to reproduce the measured values on Saturn when combined with a vertical plasma drift.

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