Dynamo-electric field-aligned currents in the plasmasphere

Details Dynamo-electric field-aligned currents in the plasmasphere Dynamo-electric field-aligned currents in the plasmasphere

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jatp...40..755s&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 40, June 1978, p. 755-760.

Physics

2

Dynamo Theory, Electric Fields, Field Aligned Currents, Ionospheric Currents, Magnetic Variations, Antisymmetry, Atmospheric Circulation, Atmospheric Conductivity, Current Density, Field Theory (Physics), Plasmapause, Tides

Scientific paper

The dynamo theory has been used to interpret antisymmetric sq-variations. The following results have been found analytically: (1) the antisymmetric electric field is important only for driving field-aligned coupling currents between both hemispheres, (2) the antisymmetric part of the observed sq-variations can be explained best by the dynamo-action of seasonally depending (1, 1)-, (1, -2)-, and (2, 2)-tidal modes, and (3) at all seasons the field-aligned currents are strongest near noon where they have at north-summer in the northern hemisphere a source near 50 degrees and a sink near 30 degrees latitude.

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