Plasma sheet polytropic index as inferred from the FPE measurements

Details Plasma sheet polytropic index as inferred from the FPE measurements Plasma sheet polytropic index as inferred from the FPE measurements

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.2321z&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, Dec. 1990, p. 2321-2324.

Physics

14

Geomagnetic Tail, Ion Density (Concentration), Plasma Interaction Experiment, Polytropic Processes, Ampte (Satellites), Current Sheets, Earth Magnetosphere, International Sun Earth Explorers, Plasma Density, Plasma Layers

Scientific paper

It is shown here that a four-cell convection pattern imposed on the magnetosphere by the solar wind during northward IMF conditions can be distorted into a wrapped two-cell convection pattern which is similar to the empirical distorted two-cell convection patterns deduced by Heppner and Maynard (1987). The convection distortions are caused by the anisotropic reflections of Alfven waves due to the anisotropic and nonuniform ionospheric conductance. The distributions of the resulting field-aligned currents in the model are characteristically consistent with observed current distributions, including the NBZ currents during northward IMF.

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