Dependence of the Region II field-aligned currents on ionospheric conductivity gradients

Details Dependence of the Region II field-aligned currents on ionospheric conductivity gradients Dependence of the Region II field-aligned currents on ionospheric conductivity gradients

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35.1405c&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 35, Nov. 1987, p. 1405-1418.

Physics

3

Field Aligned Currents, Ionospheric Conductivity, Magnetosphere-Ionosphere Coupling, Polar Regions, Current Density, Daytime, Electric Potential, Hall Effect, Morning

Scientific paper

The effect of the ionospheric conductivity distribution on the field-aligned currents in the polar ionosphere is systematically studied. It is shown that the intensity and the location of the Region II field-aligned current in the magnetosphere-ionosphere coupling are critically dependent on the latitudinal gradient of the Pedersen conductivity in the morning and afternoon sectors around the auroral oval. Moreover, the Region II current density is also found to increase as the conductance ratio Sigma sub H/Sigma sub P is reduced by increasing Sigma sub P.

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