Convective instability in the polar ionosphere

Details Convective instability in the polar ionosphere Convective instability in the polar ionosphere

Jul 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975kosis..13..532a&link_type=abstract

Kosmicheskie Issledovaniia, vol. 13, July-Aug. 1975, p. 532-538. In Russian.

Physics

Convection Currents, Ionospheric Disturbances, Ionospheric Heating, Magnetic Disturbances, Polar Regions, Atmospheric Physics, Auroral Electrojets, Ionospheric Temperature

Scientific paper

Several phenomena caused by heating of the polar ionosphere are examined. It is shown that in addition to steady convection determined by the temperature gradient, a vibrational instability is possible which is associated with an anomalous gradient in the monatomic-gas density arising during intense electron effusions. The amplitude and other parameters are estimated for geomagnetic variations that may result from the development of a convective instability of the ionospheric gas. It is suggested that the obtained results may explain the local nature of certain high-latitude geomagnetic disturbances.

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