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| Titel |
A survey of magnetopause FTEs and associated flow bursts in the polar ionosphere |
| VerfasserIn |
D. A. Neudegg, S. W. H. Cowley, S. E. Milan, T. K. Yeoman, Mark Lester, G. Provan, G. Haerendel, W. Baumjohann, B. Nikutowski, J. Büchner, U. Auster, K.-H. Fornacon, E. Georgescu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 18, no. 4 ; Nr. 18, no. 4, S.416-435 |
| Datensatznummer |
250013953
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| Publikation (Nr.) |
 copernicus.org/angeo-18-416-2000.pdf |
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| Zusammenfassung |
Using the Equator-S spacecraft and SuperDARN
HF radars an extensive survey of bursty reconnection at the magnetopause and
associated flows in the polar ionosphere has been conducted. Flux transfer event
(FTE) signatures were identified in the Equator-S magnetometer data during
periods of magnetopause contact in January and February 1998. Assuming the
effects of the FTEs propagate to the polar ionosphere as geomagnetic
field-aligned-currents and associated Alfvén-waves, appropriate field mappings
to the fields-of-view of SuperDARN radars were performed. The radars observed
discrete ionospheric flow channel events (FCEs) of the type previously assumed
to be related to pulse reconnection. Such FCEs were associated with \sim80% of
the FTEs and the two signatures are shown to be statistically associated with
greater than 99% confidence. Exemplary case studies highlight the nature of the
ionospheric flows and their relation to the high latitude convection pattern,
the association methodology, and the problems caused by instrument limitations.
Key words: Ionosphere (polar ionosphere) ·
Magnetospheric physics (magnetosphere-ionosphere interaction; solar
wind-magnetosphere interactions) |
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