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| Titel |
Simultaneous observations of reconnection pulses at Cluster and their effects on the cusp aurora seen at Chinese Yellow River Station |
| VerfasserIn |
Qinghe Zhang, Malcolm Dunlop, Mike Lockwood, Ruiyuan Liu, Hongqiao Hu, Zejun Hu, Yulia Bogdanova, Huigen Yang, Beichen Zhang, Desheng Han |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250036581
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| Zusammenfassung |
| While the Cluster spacecraft were located near the high-latitude magnetopause, between
10:10 and 10:40 UT on 16 January 2004, three typical flux transfer event (FTE) signatures
were observed. During this interval, simultaneous and conjugated all-sky camera
measurements, recorded at Yellow River Station, Svalbard, Arctic, are available at 630.0 and
557.7nm that show poleward-moving auroral forms (PMAFs) consistent with magnetic
reconnection at dayside magnetopause. Simultaneous FTEs seen at the magnetopause mainly
move northward, but having duskward (eastward) and tailward velocity components, roughly
consistent with the observed direction of motion of the PMAFs in all-sky images.
Between the PMAFs in the meridional keograms extracted from the all-sky images
are intervals of lower intensity aurora which migrate equatorward just before the
PMAFs intensify: strong evidence for the equatorward eroding and poleward moving
open-closed boundary (OCB) during a variable reconnection rate under variable IMF
conditions. From the durations of the PMAFs we infer that the evolution time of FTEs is
5 -11 minutes from its origin on magnetopause to its addition to the polar cap. |
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