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| Titel |
Momentum transfer at the high-latitude magnetopause and boundary layers |
| VerfasserIn |
E. J. Lund, C. J. Farrugia, P. E. Sandholt |
| 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 ; 26, no. 8 ; Nr. 26, no. 8 (2008-08-13), S.2449-2458 |
| Datensatznummer |
250016202
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| Publikation (Nr.) |
 copernicus.org/angeo-26-2449-2008.pdf |
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| Zusammenfassung |
| How and where momentum is transferred from the solar wind to the
magnetosphere and ionosphere is one of the key problems of space physics.
Much of this transfer occurs through direct reconnection on the dayside,
particularly when the IMF is southward. However, momentum transfer also
occurs at higher latitudes via Alfvén waves on old open field lines, even
for southward IMF. This momentum is transferred to the ionosphere via
field-aligned currents (FACs), and the flow channel associated with these
FACs produces a Hall current which causes magnetic variations at high
latitude (the Svalgaard-Mansurov effect). We show examples where such
momentum transfer is observed with multiple spacecraft and ground-based
instruments. |
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