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| Titel |
Modelling the tongue-of-ionisation using CTIP with SuperDARN electric potential input: verification by radiotomography |
| VerfasserIn |
S. E. Pryse, E. L. Whittick, A. D. Aylward, H. R. Middleton, D. S. Brown, Mark Lester, J. A. Secan |
| 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. 3 ; Nr. 27, no. 3 (2009-03-06), S.1139-1152 |
| Datensatznummer |
250016446
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| Publikation (Nr.) |
 copernicus.org/angeo-27-1139-2009.pdf |
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| Zusammenfassung |
| Electric potential patterns obtained by the SuperDARN radar network are used
as input to the Coupled Thermosphere-Ionosphere-Plasmasphere model, in an
attempt to improve the modelling of the spatial distribution of the
ionospheric plasma at high latitudes. Two case studies are considered, one
under conditions of stable IMF Bz negative and the other under stable IMF Bz
positive. The modelled plasma distributions are compared with sets of
well-established tomographic reconstructions, which have been interpreted
previously in multi-instrument studies. For IMF Bz negative both the model
and observations show a tongue-of-ionisation on the nightside, with good
agreement between the electron density and location of the tongue. Under Bz
positive, the SuperDARN input allows the model to reproduce a spatial plasma
distribution akin to that observed. In this case plasma, unable to penetrate
the polar cap boundary into the polar cap, is drawn by the convective flow
in a tongue-of-ionisation around the periphery of the polar cap. |
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