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The effect of different resistivity models on magnetotail dynamicsTwo-dimensional, time-dependent MHD simulations of the interaction between the solar wind and the earth's magnetosphere have been performed to study magnetotail dynamics with varying forms of anomalous resistivity. In general, the resulting models conform to the neutral line model proposed for substorms with near-earth x points and high-speed tailward flows occurring in the magnetotail. However, in the case where Joule heating is included in the physical description of the system, the near-earth x point never moves far down tail, and high-speed tailward flows never stop. Only in the case where there is no Joule heating does the x point move down tail. Simultaneously, the high-speed tailward flows cease. These results indicate that the mechanism of energy dissipation can have an important effect on reconnection processes and the global magnetospheric dynamics.
Document ID
19860061053
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lyon, J. G.
(Naval Research Lab. Washington, DC, United States)
Fedder, J. A.
(Naval Research Lab. Washington, DC, United States)
Huba, J. D.
(U.S. Navy, Naval Research Laboratory, Washington DC, United States)
Date Acquired
August 12, 2013
Publication Date
July 1, 1986
Publication Information
Publication: Journal of Geophysical Research
Volume: 91
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
86A45791
Distribution Limits
Public
Copyright
Other

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