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An MHD simulation of the effects of the interplanetary magnetic field By component on the interaction of the solar wind with the earth's magnetosphere during southward interplanetary magnetic fieldThe interaction between the solar wind and the earth's magnetosphere has been studied by using a time-dependent three-dimensional MHD model in which the IMF pointed in several directions between dawnward and southward. When the IMF is dawnward, the dayside cusp and the tail lobes shift toward the morningside in the northern magnetosphere. The plasma sheet rotates toward the north on the dawnside of the tail and toward the south on the duskside. For an increasing southward IMF component, the plasma sheet becomes thinner and subsequently wavy because of patchy or localized tail reconnection. At the same time, the tail field-aligned currents have a filamentary layered structure. When projected onto the northern polar cap, the filamentary field-aligned currents are located in the same area as the region 1 currents, with a pattern similar to that associated with auroral surges. Magnetic reconnection also occurs on the dayside magnetopause for southward IMF.
Document ID
19870027662
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ogino, T.
(California Univ. Los Angeles, CA, United States)
Walker, R. J.
(California Univ. Los Angeles, CA, United States)
Ashour-Abdalla, M.
(California Univ. Los Angeles, CA, United States)
Dawson, J. M.
(California, University Los Angeles, United States)
Date Acquired
August 13, 2013
Publication Date
September 1, 1986
Publication Information
Publication: Journal of Geophysical Research
Volume: 91
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
87A14936
Funding Number(s)
CONTRACT_GRANT: NAGW-78
CONTRACT_GRANT: NSF ATM-82-18746
Distribution Limits
Public
Copyright
Other

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