Effect of mid-altitude ion heating on ion outflow at polar latitudes

Details Effect of mid-altitude ion heating on ion outflow at polar latitudes Effect of mid-altitude ion heating on ion outflow at polar latitudes

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.9753l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Sept. 1, 1988, p. 9753-9763.

Physics

37

Atmospheric Heating, Ion Motion, Polar Regions, Space Plasmas, Atmospheric Models, Collisionless Plasmas, Oxygen Ions, Vertical Motion

Scientific paper

The effect of ion heating on polar ion outflow, when either the parallel or perpendicular (or both) ion temperatures at the exobase are elevated above values typical for the ionosphere, was investigated using a modified semikinetic steady-state model of Barakat and Schunk (1983) that allowed for anisotropic ion heating at the exobase and eliminated lower boundary potential jumps. In addition, the relative impact of the ion heating vs electron heating on the oxygen escape fluxes was investigated by examining the flux of O(+) ions for various combinations of electron and ion temperatures. It is demonstrated that the O(+) escape flux can be increased, to levels as high as were obtained by Barakat and Schunk (1983) with the electron temperatures of 10,000 K, by raising, instead, the ion temperatures (but to values considerably less than the 100,000 K observed by Moore et al., 1986).

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