Physics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.2289k&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 23, p. 2289-2292.
Physics
22
Crossed Fields, F Region, Ion Temperature, Ionospheric Heating, Oxygen Ions, Particle Acceleration, Anisotropy, Electric Fields, Ionic Collisions, Magnetic Fields
Scientific paper
A numerical solution to the 20-moment set of transport equations has been found in order to study subauroral ionospheric outflows during periods of enhanced perpendicular ion drifts. The numerical model solves the time-dependent O(+) density, momentum, and both the parallel and perpendicular energy and heat flow equations in the 200-6000 km altitude range. Assuming perpendicular drifts of 3 km/s relative to the neutral atmosphere, we have found that anisotropic heating of O(+) (a result of ion-neutral collisions) leads to a temperature anisotropy, with perpendicular temperatures exceeding 8000 K and parallel temperatures greater than 5000 K (near 200 km altitude). Above approximately 2000 km, transport processes dominate the effects of collisions and wavelike oscillations in O(+) velocity, temperature and heat flux were noted.
Gombosi Tamas I.
Khazanov George V.
Korosmezey A.
Rasmussen Carl Edward
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