Physics
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.2567h&link_type=abstract
Journal of Geophysical Research, vol. 84, June 1, 1979, p. 2567-2572.
Physics
4
Interplanetary Magnetic Fields, Ionospheric Currents, Magnetic Variations, Polar Caps, Diurnal Variations, Ground Stations, Magnetic Signatures, Perturbation, Vector Analysis
Scientific paper
The daily magnetic variation at the Resolute Bay polar cap station is examined for its dependence on the N-S component Bz of the IMF. The magnetic variations are found to be approximately in the same direction in the nightside polar cap for both northward and southward IMF, the amplitudes of the perturbations being larger for southward IMF. In the dayside, significant differences between the northward and southward IMF cases are observed. It is suggested that the overall pattern consists of two standard two-cell current patterns placed in juxtaposition such that the interface between them is the site of the antisunward current (sunward convection). Within the centers of each of these two patterns the currents are sunward (convection is antisunward).
Akasofu Syuh-Ichi
Horwitz James L.
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