Ionospheric and Birkeland current distributions for northward interplanetary magnetic field - Inferred polar convection

Details Ionospheric and Birkeland current distributions for northward interplanetary magnetic field - Inferred polar convection Ionospheric and Birkeland current distributions for northward interplanetary magnetic field - Inferred polar convection

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.7453z&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Sept. 1, 1984, p. 7453-7458. NSF-Navy-supported research.

Computer Science

Sound

90

Auroral Zones, Birkeland Currents, Current Distribution, Interplanetary Magnetic Fields, Ionospheric Currents, Convection Currents, Fourier Analysis, Magnetic Signatures, Magsat Satellites, Satellite Sounding, Southern Hemisphere

Scientific paper

A comprehensive analysis of the total vector magnetic disturbance field is presented. The analysis is based on satellite observations of the magnetic disturbance field over the polar regions during a strong northward-moving interplanetary magnetic field IMF. Specific attention is given to a determination of northward (NBZ) currents which accompany Birkeland currents. A Fourier technique is used to derive the physical parameters ionospheric system during two days of strong IMF activity, January 3, 1980 and November 11, 1979. The system shows a W-shaped pattern with an antisunward current over the magnetic pole and return currents on either side. It is shown that the antisunward orientation of the system implies the presence of sunward convection. Suggestions are given for multicell patterns over the polar regions for northward IMF during an IMF sign change.

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