Physics
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985georl..12..167g&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 12, April 1985, p. 167-170.
Physics
61
Earth Ionosphere, Electron Energy, Ion Temperature, Plasma Dynamics, Plasma-Electromagnetic Interaction, Polar Regions, Differential Equations, Hydrogen Ions, Mach Number, Oxygen Ions, Space Plasmas, Time Dependence
Scientific paper
The coupled, time-dependent continuity, momentum, and energy equations of a two-ion O(+) and H(+) quasi-neutral plasma were solved in order to extend understanding of polar wind behavior. This numerical code allows studies of the time dependent behavior of polar wind-type flows into and out of the ionosphere. Initial studies indicate that the typical time constants for electron and ion temperature changes are of the order of minutes and tens of minutes, respectively. The response time of the minor high altitude ion O(+) is less than an hour, whereas that of the major ion, H(+), is many hours. The initial test runs also demonstrate the fact that temporary supersonic flows of both O(+) and H(+) are possible, especially in the presence of significant ion heating.
Cravens Thomas E.
Gombosi Tamas I.
Nagy Andrew F.
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