Electrodynamic structural features of the auroral zone as deduced using data from a meridional chain of ionospheric and magnetic stations

Details Electrodynamic structural features of the auroral zone as deduced using data from a meridional chain of ionospheric and magnetic stations Electrodynamic structural features of the auroral zone as deduced using data from a meridional chain of ionospheric and magnetic stations

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jatp...54..437z&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 54, Mar.-Apr. 1992, p. 437-445.

Computer Science

Sound

Auroral Zones, E Region, Geomagnetism, Ionospheric Currents, Ionospheric Sounding, Atmospheric Ionization, Auroral Electrojets, Particle Precipitation

Scientific paper

This study has used ionospheric and magnetic observational data obtained at a meridional chain of stations during the high latitude geophysical experiment Taimir-82 in the winter of 1982-1983. Mean statistical latitude-time distributions of the occurrence probability of various types of E(s), their blanketing frequency, and the amplitude of geomagnetic field H-variations have been constructed. Based on these distributions and taking the E(s) properties into account, an analysis is made of the mutual correspondence of large-scale structures of the auroral ionosphere and ionospheric currents. Ionospheric currents flow mainly in the region of high E-layer ionization. With increasing magnetic activity, the zone of currents and the zone of ionization expand simultaneously toward lower latitudes. The evening eastward electrojet and the morning westward electrojet are localized inside the zone of diffuse auroral precipitation which is responsible for the formation of E(s) type r. The equatorial part of the midnight westward electrojet is also located in the zone of diffuse precipitation which coincides also with the region of maximum ionization of the E-layer. The polar part of this electrojet, which extends far into the dusk sector, is located in the zone of discrete auroral precipitation (a type E(s)).

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