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| Titel |
On the terms of geomagnetic daily variation in Antarctica |
| VerfasserIn |
P. Michelis, R. Tozzi, A. Meloni |
| 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 ; 27, no. 6 ; Nr. 27, no. 6 (2009-06-22), S.2483-2490 |
| Datensatznummer |
250016561
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| Publikation (Nr.) |
 copernicus.org/angeo-27-2483-2009.pdf |
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| Zusammenfassung |
| The target of this work is to investigate the nature of magnetic
perturbations produced by ionospheric and magnetospheric currents as
recorded at high-latitude geomagnetic stations. In particular, we
investigate the effects of these currents on geomagnetic data recorded in
Antarctica. To this purpose we apply a mathematical method, known as Natural
Orthogonal Composition, to analyze the magnetic field disturbances along the
three geomagnetic field components (X, Y and Z) recorded at Mario Zucchelli
Station (IAGA code TNB; geographic coordinates: 74.7° S, 164.1° E)
from 1995 to 1998. Using this type of analysis, we characterize the dominant
modes of the geomagnetic field daily variability through a set of empirical
orthogonal functions (EOFs). While such mathematically independent EOFs do
not necessarily represent physically independent modes of variability, we
find that some of them are actually related to well known current patterns
located at high latitudes. |
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