Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/7841
Title: Interplanetary magnetic field control of fast azimuthal flows in the nightside high-latitude ionosphere
Authors: Grocott, Adrian
Milan, Steve E.
Yeoman, Tim K.
First Published: 24-Apr-2008
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.
DOI Link: 10.1029/2008GL033545
ISSN: 0094-8276
Links: http://onlinelibrary.wiley.com/doi/10.1029/2008GL033545/abstract
http://hdl.handle.net/2381/7841
Type: Article
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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