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Modeling of energy buildup for a flare-productive regionA self-consistent MHD model of shearing magnetic loops is used to investigate magnetic energy buildup in active region AR 2372 (Boulder number), in the period of April 5-7, 1980. The magnetic field and sunspot motions in this region, derived using observational data obtained by the Marshall Space Flight Center Solar Observatory, suggest the initial boundary conditions for the model. It is found that the plasma parameters (i.e., density, temperature, and plasma flow velocity) do not change appreciably during the process of energy buildup as the magnetic loops are sheared. Thus, almost all of the added energy is stored in the magnetic field. Furthermore, it is shown that dynamical processes are not important during a slow buildup (i.e., for a shearing velocity less than 1 km/s). Finally, it is concluded that the amount of magnetic energy stored and the location of this stored magnetic energy depend on the initial magnetic field (whether potential or sheared) and the magnitude of the shearing motion.
Document ID
19840052024
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Wu, S. T.
(Alabama Univ. Huntsville, AL, United States)
Krall, K. R.
(Alabama, University Huntsville, AL, United States)
Hu, Y. Q.
(Alabama, University Huntsville, AL; University of Science and Technology of China, Hefei, People's Republic of China, United States)
Hagyard, M. J.
(NASA Marshall Space Flight Center Space Science Laboratory, Huntsville, AL, United States)
Smith, J. B., Jr.
(NOAA, Space Environment Laboratory, Boulder CO, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Publication Information
Publication: Solar Physics
Volume: 90
ISSN: 0038-0938
Subject Category
Solar Physics
Accession Number
84A34811
Funding Number(s)
CONTRACT_GRANT: F19628-83-K-0019
CONTRACT_GRANT: NAS8-33526
CONTRACT_GRANT: NAS8-33525
CONTRACT_GRANT: NASA ORDER H-12261-B
CONTRACT_GRANT: NAGW-9
Distribution Limits
Public
Copyright
Other

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