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| Titel |
Detection of a plasmaspheric wind in the Earth's magnetosphere by the Cluster spacecraft |
| VerfasserIn |
I. Dandouras |
| 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 ; 31, no. 7 ; Nr. 31, no. 7 (2013-07-02), S.1143-1153 |
| Datensatznummer |
250019058
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| Publikation (Nr.) |
 copernicus.org/angeo-31-1143-2013.pdf |
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| Zusammenfassung |
| Plumes, forming at the plasmapause and released outwards, constitute a
well-established mode for plasmaspheric material release to the Earth's
magnetosphere. They are associated to active periods and the related
electric field change. In 1992, Lemaire and Shunk proposed the existence of
an additional mode for plasmaspheric material release to the Earth's
magnetosphere: a plasmaspheric wind, steadily transporting cold
plasmaspheric plasma outwards across the geomagnetic field lines, even
during prolonged periods of quiet geomagnetic conditions. This has been
proposed on a theoretical basis. Direct detection of this wind has, however,
eluded observation in the past. Analysis of ion measurements, acquired in
the outer plasmasphere by the CIS experiment onboard the four Cluster
spacecraft, provide now an experimental confirmation of the plasmaspheric
wind. This wind has been systematically detected in the outer plasmasphere
during quiet and moderately active conditions, and calculations show that it
could provide a substantial contribution to the magnetospheric plasma
populations outside the Earth's plasmasphere. Similar winds should also
exist on other planets, or astrophysical objects, quickly rotating and
having an atmosphere and a magnetic field. |
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