Modeling substorm current systems using conductivity distributions inferred from DE auroral images

Details Modeling substorm current systems using conductivity distributions inferred from DE auroral images Modeling substorm current systems using conductivity distributions inferred from DE auroral images

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....9111235k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Oct. 1, 1986, p. 11235-11256.

Physics

46

Atmospheric Models, Auroral Zones, Ionospheric Conductivity, Polar Substorms, Auroral Electrojets, Dynamics Explorer 1 Satellite, Field Aligned Currents, Ground Stations, Ionospheric Currents, Satellite Imagery, Spatial Distribution

Scientific paper

The first attempt to systematically use DE 1 auroral images to infer ionospheric conductivities is presented. These conductivities are then used to compute the distributions of ionospheric and field-aligned current patterns during auroral substorms. It is concluded that the western electrojet is, in general, collocated with the region of high auroral luminosity, while the region of relatively low luminosity in the evening sector is collocated with the eastward electrojet. The upward field-aligned currents exist in the brightest auroral region on the poleward side of the evening auroral oval and on the equatorward side of the morning oval. A significant amount of ionospheric currents can flow in regions where there are no bright auroral emissions.

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