The ionospheric disturbance dynamo

Details The ionospheric disturbance dynamo The ionospheric disturbance dynamo

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.1669b&link_type=abstract

Journal of Geophysical Research, vol. 85, Apr. 1, 1980, p. 1669-1686.

Physics

201

Dynamo Theory, Ionospheric Disturbances, Thermosphere, Winds Aloft, Atmospheric Electricity, Atmospheric Models, Diurnal Variations, Magnetic Storms, Northern Hemisphere

Scientific paper

The purpose of the present work is to develop a theory of the ionospheric disturbance dynamo and to examine, on the basis of theoretically predicted features, its relevance to the understanding of certain observations. A longitudinally symmetric, time-dependent numerical model of the thermospheric disturbance winds driven by an auroral heating event and the associated electric fields and currents derived for longitudinally symmetric conductivities are presented. The study analyzes the pattern of fields and currents obtained from a more realistic dynamo model including longitudinally varying conductivities. Ample observational evidence exists, suggesting that the ionospheric disturbance dynamo has had a significant effect on storm-time ionospheric electric fields at middle and low latitudes.

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