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| Titel |
Polarisation in the auroral red line during coordinated EISCAT Svalbard Radar/optical experiments |
| VerfasserIn |
M. Barthélémy, J. Lilensten  , F. Pitout, C. Simon Wedlund, R. Thissen, D. Lorentzen, F. Sigernes, J. Moen, G. Gronoff, I. McCrea, H. Rothkael, H. Ménager, A. Aruliah |
| 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 ; 29, no. 6 ; Nr. 29, no. 6 (2011-06-22), S.1101-1112 |
| Datensatznummer |
250017044
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| Publikation (Nr.) |
 copernicus.org/angeo-29-1101-2011.pdf |
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| Zusammenfassung |
| The polarisation of the atomic oxygen red line in the Earth's thermosphere is
observed in different configurations with respect to the magnetic field line
at high latitude during several coordinated Incoherent Scatter radar/optical experiment campaigns. When pointing northward with a line-of-sight
nearly perpendicular to the magnetic field, we show that, as expected, the
polarisation is due to precipitated electrons with characteristic energies of
a few hundreds of electron Volts. When pointing toward the zenith or
southward with a line-of-sight more parallel to the magnetic field, we show
that the polarisation practically disappears. This confirms experimentally
the predictions deduced from the recent discovery of the red line
polarisation. We show that the polarisation direction is parallel to the
magnetic field line during geomagnetic activity intensification and that
these results are in agreement with theoretical work. |
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