Field-aligned currents in the magnetospheric boundary layer

Details Field-aligned currents in the magnetospheric boundary layer Field-aligned currents in the magnetospheric boundary layer

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85...37l&link_type=abstract

Journal of Geophysical Research, vol. 85, Jan. 1, 1980, p. 37-40.

Physics

4

Atmospheric Models, Boundary Layers, Current Sheets, Field Aligned Currents, Magnetopause, Atmospheric Stratification, Lines Of Force, Magnetohydrodynamic Flow, Wave Excitation

Scientific paper

A self-consistent magnetopause-boundary layer model is constructed which contains two current layers, one for the magnetopause and one for the magnetosphere-boundary layer transition region. Field-aligned sheet currents in the boundary layer are generated by the plasma flow along the boundary layer. The magnitude of these boundary layer field-aligned currents is about 10 to the -8th A/sq m, which can be scaled along field lines to about 5 x 10 to the -6th A/sq m near the ionosphere and therefore can be identified as a possible source for the auroral sheet currents. The cross-field current density in the model is also about 10 to the -8th A/sq m, which is sufficient to excite the lower-hybrid-drift waves to produce the observed electromagnetic fluctuations in the magnetopause-boundary layer region.

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