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| Titel |
The influence of the interplanetary medium on SuperDARN radar scattering occurrence |
| VerfasserIn |
P. Ballatore, J. P. Villain, N. Vilmer, M. Pick |
| 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 ; 18, no. 12 ; Nr. 18, no. 12, S.1576-1583 |
| Datensatznummer |
250014102
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| Publikation (Nr.) |
 copernicus.org/angeo-18-1576-2000.pdf |
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| Zusammenfassung |
The effects of the characteristics of the
interplanetary medium on the radar scattering occurrence, related to the whole
array of SuperDARN radars installed in the Northern Hemisphere, have been
studied over a two-year period. Statistically significant correlations of the
variation of the scattering occurrence are found with the merging electric field
and with the negative Bz component of the interplanetary
magnetic field, independent of the seasonal period considered. This result
demonstrates that the merging rate (and in particular the reconnection process)
between the interplanetary magnetic field and the magnetosphere is a relevant
factor affecting the occurrence of scattering. For comparison, we note that no
statistically significant correlations are obtained when the interplanetary ion
density or the solar wind speed are considered, although also these variables
affect to a small degree the scattering occurrence variation. The study of the
latitudinal and magnetic local time dependence of the observations shows an
association between the considered correlation and the location of the auroral
oval and the cusp/cleft region.
Key words: Ionosphere (ionospheric irregularities) ·
Magnetospheric physics (solar wind-magnetosphere interactions) · Radio science
(ionospheric physics) |
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