NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Polar cap deflation during magnetospheric substormsThe expanding/contracting polar cap model has been used to simulate DE-2 ion drift data during substorms as determined using the AL index. Of the 39 cases modeled, 57 percent required the opening of a nightside gap which maps to where reconnection occurs in the tail; 75 percent of the 16 recovery phase cases required a nightside gap, while only 29 percent of the 17 expansion phase cases required a nightside gap. On the basis of this result, it is concluded that if a nightside gap implies tail reconnection, then reconnection probably occurs after expansion phase onset and continues throughout most of the recovery phase of a substorm.
Document ID
19890049333
Document Type
Reprint (Version printed in journal)
Authors
Moses, J. J.
(High Altitude Observatory Boulder, CO, United States)
Siscoe, G. L.
(California, University Los Angeles, United States)
Heelis, R. A.
(Texas, University Richardson, United States)
Winningham, J. D.
(Southwest Research Institute San Antonio, TX, United States)
Date Acquired
August 14, 2013
Publication Date
April 1, 1989
Publication Information
Publication: Journal of Geophysical Research
Volume: 94
ISSN: 0148-0227
Subject Category
Geophysics
Funding Number(s)
CONTRACT_GRANT: NAG5-305
CONTRACT_GRANT: NAS5-28712
CONTRACT_GRANT: F19628-84-N-0006
CONTRACT_GRANT: NSF ATM-87-22962
CONTRACT_GRANT: NASA ORDER W-16320
CONTRACT_GRANT: NAG5-306
Distribution Limits
Public
Copyright
Other
No Preview Available