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|Title:||Interplanetary magnetic field control of fast azimuthal flows in the nightside high-latitude ionosphere|
Milan, Steve E.
Yeoman, Tim K.
|Publisher:||American Geophysical Union (AGU)|
|Citation:||Geophysical Research Letters, 2008, 35, L08102.|
|Abstract:||SuperDARN radar data from both hemispheres for the interval January 1999 to November 2006 have been inspected for evidence of high-speed azimuthal flows in the nightside high-latitude ionosphere. In the northern hemisphere, 88% of the westward directed fast flows occurred during IMF BY negative intervals and 83% of the eastward flows occurred during IMF BY positive intervals. In the southern hemisphere 82% of the westward flows occurred during IMF BY positive intervals and 74% of the eastward flows occurred during IMF BY negative intervals. ∼74% of these fast flows occurred when the IMF was within the 30° < ∣ ∣ < 100° clock angle range and the AE index was below 150 nT. These results support the hypothesis that highly dynamic magnetospheric activitycan be associated with predominantly northward, but BY-dominated IMF driving conditions and subsequent non-substorm reconnection in a twisted magnetotail.|
|Rights:||This paper was published as Geophysical Research Letters, 2008, 35, L08102. Copyright 2008 American Geophysical Union. It is also available from http://www.agu.org/pubs/crossref/2008/2008GL033545.shtml. Doi: 10.1029/2008GL033545|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
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