Ionospheric current system associated with the equatorial counterelectrojet

Details Ionospheric current system associated with the equatorial counterelectrojet Ionospheric current system associated with the equatorial counterelectrojet

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....9913209r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A7, p. 13,209-13,217

Other

6

Atmospheric Tides, Diurnal Variations, Earth Ionosphere, Equatorial Electrojet, Vortices, India, Seasons, Solstices

Scientific paper

The phenomenon of the equatorial counterelectrojet current (CEJ) is studied utilizing the D, H, and Z components of the magnetic field at a chain of geomagnetic observatories in the Indo-Russian zone extending from 0 to 75 deg N magnetic dip. Very significant changes in both H and D components are shown to occur on CEJ days at all stations even north of Sq focus. The current system associated with CEJ consists of two vortices, one counterclockwise in the morning and another clockwise in the evening hours. The counetrelectrojet events during December solstices seem to be associated with the disappearance of the Sq current loop in the Indo-Russian sector and on a number of consecutive days. The cause of the counterelectrojet is suggested to be the changes in various modes of the tidal movements in the upper atmosphere.

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