Low- and mid-latitude ionospheric electric fields during the January 1984 GISMOS campaign

Details Low- and mid-latitude ionospheric electric fields during the January 1984 GISMOS campaign Low- and mid-latitude ionospheric electric fields during the January 1984 GISMOS campaign

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.2367f&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, March 1, 1990, p. 2367-2377.

Physics

52

Electric Fields, Electromagnetic Coupling, Ionospheric Currents, Temperate Regions, Tropical Regions, Convection, Diurnal Variations, Dynamo Theory, Incoherent Scatter Radar, Interplanetary Magnetic Fields, Plasma Drift, Spatial Distribution

Scientific paper

The electrical coupling between the high-, middle-, and low-latitude ionospheres during January 17-19, 1984 is examined, using interplanetary and high-latitude magnetic field data together with F region plasma drift measurements from the EISCAT, Sondre Stromfjord, Millstone Hill, Saint-Santin, Arecibo, and Jicamarca incoherent scatter radars. The penetration both the zonal and meridional electric field components of high-latitude origin into the low-latitude and the equatorial ionospheres are studied. The observations in the postmidnight sector are used to compare the longitudinal variations of the zonal perturbation electric field with predictions made from global convection models. The results show that the meridional electric field perturbations are considerably more attenuated with decreasing latitude than the zonal fluctuations. It is concluded that variations in the meridional electric field at low latitudes are largely due to dynamo effects.

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