The influence of anisotropic F region ion velocity distributions on ionospheric ion outflows into the magnetosphere

Details The influence of anisotropic F region ion velocity distributions on ionospheric ion outflows into the magnetosphere The influence of anisotropic F region ion velocity distributions on ionospheric ion outflows into the magnetosphere

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.1347s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Feb. 1, 1989, p. 1347-1358. Research supported by the Oskari Huttunen

Physics

14

Anisotropic Media, F Region, Ion Motion, Magnetosphere-Ionosphere Coupling, Space Plasmas, Velocity Distribution, Atmospheric Temperature, Hydrodynamics, Particle Acceleration

Scientific paper

The field-aligned ionospheric ion momentum equation is studied, focusing on the dependence of coupling between pressure anisotropy and the inhomogeneous geomagnetic field, or hydrodynamic mirror force, on the ion drift. It is shown that the hydrodynamic mirror force increases rapidly with ion drift relative to the neutral gas, but is not highly dependent on the ion-neutral collision model used. EISCAT observations of a burst of flow and the studied, showing that the nonthermal plasma which results is subject to a hydrodynamic mirror force which is about 10 percent of the gravitational downforce.

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