Physics
Scientific paper
Oct 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975p%26ss...23.1377r&link_type=abstract
Planetary and Space Science, vol. 23, Oct. 1975, p. 1377-1389. Research supported by the National Research Council of Canada and
Physics
5
Atmospheric Electricity, Auroral Electrojets, Electric Current, Current Sheets, Electric Field Strength, Hall Effect, High Energy Electrons, Lines Of Force, Magnetic Effects
Scientific paper
The paper demonstrates the existence of eastward electrojet flow in the dawn sector in the latitude regime normally occupied by the westward convection electrojet. It is shown that the convection westward electrojet near dawn may coexist with the eastward electrojet while lying poleward of it. It is suggested that this eastward electrojet consists of Pedersen current flow driven by an eastward electric field, and it is shown that the field lines which penetrate the eastward electrojet are populated by energetic electrons normally associated with the plasma sheet as well as high energy electrons normally associated with the trapped particle population. The high conductivity channel is generated by processes associated with the precipitation of high energy (above 20 keV) electrons drifting eastwards from midnight in the trapping region. Antiparallel current sheets may flow on the magnetic lines of force penetrating the electrojet, and this flow is closed in the ionosphere by Hall currents flowing equatorward in the high conductivity channel.
Hron Martin
Rostoker Gordon
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