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| Titel |
A multi-diagnostic approach to understanding high-latitude plasma transport during the Halloween 2003 storm |
| VerfasserIn |
P. Yin, C. N. Mitchell, P. Spencer, I. McCrea, T. Pedersen |
| 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. 9 ; Nr. 26, no. 9 (2008-09-15), S.2739-2747 |
| Datensatznummer |
250016223
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| Publikation (Nr.) |
 copernicus.org/angeo-26-2739-2008.pdf |
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| Zusammenfassung |
| During the Halloween 2003 storm event, significant electron density
enhancements at elevated F-layer altitudes were recorded by the EISCAT and
ESR radars in northern Europe between 20:00 and 24:00 UT on 30 October. At the
same time, a sequence of optical images from Qaanaaq in northern Greenland
captured a series of eastward-propagating polar cap patches. In this paper,
an advanced 4-D tomographic method based on the assimilation of global GPS
data, coupled to a predictive Kalman filtering technique, has been used to
reveal the linkage between these ionospheric structures. The combination of
the various data sources has clearly established the time history of this
extreme event, in which high-density plasma was uplifted in the dayside
ionosphere and convected anti-sunward across the polar cap to European high
latitudes at an elevated F-layer. Using this multi instrument approach, we
can differentiate between those density structures observed at the ESR which
occurred as a result of cross-polar transport and those more likely to have
been produced by in-situ soft particle precipitation, a distinction which is
supported by the ESR and EISCAT data. The multi-diagnostic approach reported
here has the potential significantly to extend our current understanding of
high latitude plasma transport and the origin of electron density
enhancements. |
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