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| Titel |
Spatial distribution of rolled up Kelvin-Helmholtz vortices at Earth's dayside and flank magnetopause |
| VerfasserIn |
M. G. G. T. Taylor, H. Hasegawa, B. Lavraud, T. Phan, C. P. Escoubet, M. W. Dunlop, Y. V. Bogdanova, A. L. Borg, M. Volwerk, J. Berchem, O. D. Constantinescu, J. P. Eastwood, A. Masson, H. Laakso  , J. Soucek, A. N. Fazakerley, H. U. Frey, E. V. Panov, C. Shen, J. K. Shi, D. G. Sibeck, Z. Y. Pu, J. Wang, J. A. Wild |
| 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 ; 30, no. 6 ; Nr. 30, no. 6 (2012-06-29), S.1025-1035 |
| Datensatznummer |
250017241
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| Publikation (Nr.) |
 copernicus.org/angeo-30-1025-2012.pdf |
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| Zusammenfassung |
| The Kelvin-Helmholtz Instability (KHI) can drive waves at the magnetopause.
These waves can grow to form rolled-up vortices and facilitate transfer of
plasma into the magnetosphere. To investigate the persistence and frequency
of such waves at the magnetopause we have carried out a survey of all Double
Star 1 magnetopause crossings, using a combination of ion and magnetic field
measurements. Using criteria originally used in a Geotail study made by
Hasegawa et al. (2006) (forthwith referred
to as H2006), 17 candidate events were identified from the
entire TC-1 mission (covering ~623 orbits where the magnetopause was
sampled), a majority of which were on the dayside of the terminator. The
relationship between density and shear velocity was then investigated, to
identify the predicted signature of a rolled up vortex from H2006 and all 17
events exhibited some level of rolled up behavior. The location of the
events had a clear dawn-dusk asymmetry, with 12 (71%) on the post noon,
dusk flank suggesting preferential growth in this region. |
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