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| Titel |
Daily variation at Concordia station (Antarctica) and its dependence on IMF conditions |
| VerfasserIn |
L. Cafarella, D. Mauro, S. Lepidi, A. Meloni, M. Pietrolungo, L. Santarelli, J. J. Schott |
| 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 ; 25, no. 9 ; Nr. 25, no. 9 (2007-10-02), S.2045-2051 |
| Datensatznummer |
250015919
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| Publikation (Nr.) |
 copernicus.org/angeo-25-2045-2007.pdf |
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| Zusammenfassung |
| After some short test surveys, during the 2004–2005 summer expedition in
Antarctica, a geomagnetic French-Italian observatory was installed on the
plateau (geographic coordinates: 75.1° S, 123.4° E; corrected
geomagnetic coordinates: 88.9° S, 54.3° E; UT=LT−8) very close to
the geomagnetic pole. In this paper we present some peculiarities of the
daily variation as observed at this polar cap observatory during the years
2005 and 2006, taking into account the different Loyd seasons and different
interplanetary magnetic field conditions. Some interesting results emerge
from the analysis, confirming the dependence of the daily variation (and of
the associated polar current systems) on the IMF Bz and By
components. In particular the analysis showed that different Bz
conditions correspond to different contribution to daily variation of
ionospheric and field aligned currents, while particular By conditions
lead to a time shift of the diurnal variation, indicating an asymmetry with
respect to the noon meridian. |
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