Ion escape fluxes from the terrestrial high-latitude ionosphere

Details Ion escape fluxes from the terrestrial high-latitude ionosphere Ion escape fluxes from the terrestrial high-latitude ionosphere

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....9212255b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Nov. 1, 1987, p. 12255-12266.

Physics

36

Earth Ionosphere, Escape (Abandonment), Hydrogen Ions, Ionospheric Ion Density, Oxygen Ions, Polar Regions, Electron Energy, Solar Cycles, Thermal Energy

Scientific paper

In this paper, the hydrodynamic transport equations for H(+) and O(+) are solved, including the important dynamic, collisional, and chemical effects that operate in the F region ionosphere below regions of ion acceleration. It is found that the most important parameter controlling the amount of O(+) in plasma outflows is the total ion flux demand imposed on the ionosphere by the higher-altitude acceleration region. The O(+) content is further modulated by the temperature of the exosphere and the resultant composition in the topside ionosphere, and by the location of the lower boundary of the ion acceleration region relative to the crossover altitude, where O and H have equal densities. As solar activity increases, the limiting O(+) escape flux increases, while the limiting H(+) escape flux decreases.

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