Large-scale Birkeland currents in the dayside polar region during strongly northward IMF - A new Birkeland current system

Details Large-scale Birkeland currents in the dayside polar region during strongly northward IMF - A new Birkeland current system Large-scale Birkeland currents in the dayside polar region during strongly northward IMF - A new Birkeland current system

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.7441i&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Sept. 1, 1984, p. 7441-7452. NSF-Navy-supported research.

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158

Birkeland Currents, Interplanetary Magnetic Fields, Ionospheric Currents, Magnetic Signatures, Polar Regions, Antarctic Regions, Arctic Regions, Daytime, Magsat Satellites, Statistical Analysis, Time Response

Scientific paper

Field magnetic data collected from 146 MAGSAT and Triad satellite orbits over polar regions are used to investigate the stable, well-defined patterns of transverse magnetic disturbances occurring during periods of strongly positive Birkeland currents. Several characteristics of the polar disturbances are described, in a series of magnetometric diagrams, and the statistical relationships between spatial patterns and intensities of both the disturbances and Birkeland currents are discussed. It is found that the current system becomes more stable and intensifies as the Birkeland currents become more northward. The new stable polar cap current system is important because of its relationship to a variety of other northward Birkeland current phenomena such as polar cap auroral arcs and multicell convective flow patterns.

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