Radar profiles of the equatorial electrojet

Details Radar profiles of the equatorial electrojet Radar profiles of the equatorial electrojet

Nov 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976georl...3..673c&link_type=abstract

Geophysical Research Letters, vol. 3, Nov. 1976, p. 673-676. Research supported by the Institut National d'Astronomie et de Geo

Astronomy and Astrophysics

Astronomy

6

E Region, Equatorial Electrojet, Ionospheric Currents, Ionospheric Electron Density, Magnetic Variations, Radar Measurement, Africa, Asymmetry, Electric Fields, Geomagnetism, Ionospheric Drift, Magnetic Field Configurations, Peru, Phase Velocity

Scientific paper

The electrojet current deduced from radar measurements was found in the past to present large E-W variations near the coast of Peru. New measurements in Africa indicate that the electrojet shows no anomalous variations with longitude in Central Africa while a large E-W asymmetry is detected in East Africa near the Red Sea. Local structures of the magnetic field and particularly the non-perpendicularity of the field lines to the dip equator can be at the origin of a permanent asymmetry. The origin of the enhancement of the asymmetry during magnetic disturbances is still unclear but can be associated partly to neutral wind gradients and possibly to induced effects related to large variations of the earth conductivity in East Africa.

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