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Electrodynamics of the westward traveling surgeIt is shown that the global convection pattern, the ionospheric current, and the field-aligned current associated with the westward traveling surge in the asymptotic state can be modeled quantitatively as consequences of a blockage of the Hall current from closure in the magnetosphere via field-aligned currents. The conductivity is allowed to increase self-consistently with increasing upward field-aligned current in the model. This inclusion of the self-consistent enhanced ionospheric conductivity due to discrete auroral precipitations is found to generate a localized intense westward electrojet on the poleward side of the Harang discontinuity. The westward electrojet is also found to rotate counterclockwise, merging into the eastward electrojet around the leading edge of the surge. Thus the major features of the westward traveling surge can be reproduced reasonably well in the model.
Document ID
19850062299
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kan, J. R.
(Alaska Univ. Fairbanks, AK, United States)
Kamide, Y.
(Alaska, University Fairbanks, United States)
Date Acquired
August 12, 2013
Publication Date
August 1, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
85A44450
Funding Number(s)
CONTRACT_GRANT: NAG5-469
CONTRACT_GRANT: F19628-82-K-0010
CONTRACT_GRANT: NSF ATM-83-17456
Distribution Limits
Public
Copyright
Other

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