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| Titel |
Observations of plasma vortices in the vicinity of flow-braking: a case study |
| VerfasserIn |
K. Keika, R. Nakamura, M. Volwerk, V. Angelopoulos, W. Baumjohann, A. Retinò, M. Fujimoto, J. W. Bonnell, H. J. Singer, H. U. Auster, J. P. McFadden, D. Larson, I. Mann |
| 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 ; 27, no. 8 ; Nr. 27, no. 8 (2009-08-04), S.3009-3017 |
| Datensatznummer |
250016608
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| Publikation (Nr.) |
 copernicus.org/angeo-27-3009-2009.pdf |
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| Zusammenfassung |
| We examine fast plasma flows and magnetic field fluctuations observed by
THEMIS at 03:00–03:30 UT on 12 December 2007. All THEMIS probes are
situated in the near-Earth plasma sheet (XSM>−10 RE) with 1–2 RE
spacecraft separations in azimuthal and radial directions. We focus
on the observations of plasma convective flows made simultaneously by more
than one THEMIS probe. At about 03:10 UT and 03:14 UT, the THEMIS P2 probe
observed earthward flows of >100 km/s. The THEMIS P1 probe, located
duskward and earthward of P2, observed tailward flows under a positive
Bz. The inner most probe THEMIS P4, located at almost the same MLT as
THEMIS P1 and P2, did not see any clear flow. We examine the convective flow
patterns for the THEMIS observations. We conclude that plasma vortices are
formed near the region where the earthward flows slow down and turn in
azimuthal directions. |
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