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| Titel |
A case-study of the low-latitude thermosphere during geomagnetic storms and its new representation by improved MSIS model |
| VerfasserIn |
T. K. Pant, R. Sridharan |
| 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 ; 16, no. 11 ; Nr. 16, no. 11, S.1513-1518 |
| Datensatznummer |
250013547
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| Publikation (Nr.) |
 copernicus.org/angeo-16-1513-1998.pdf |
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| Zusammenfassung |
The thermospheric temperatures from low and
equatorial latitudes during geomagnetically disturbed periods are known to
exhibit significant deviations from atmospheric model predictions. Also, the
oscillatory features seen in the observations are not accounted for by the
models. A simple relation has been established between the difference in the
observed and model-predicted temperatures and the rate of change of Dst,
the magnetic index representing the ring current variabilities. Using this
relation, a correction term has been added to the latest MSIS-90 model algorithm
and almost all the observed variations in neutral temperatures spectroscopically
determined from Mt.Abu, a low-latitude station in India, are successfully
reproduced for two moderate geomagnetic storms.
Key words. Low-latitude thermosphere · MSIS model ·
Stormtime model predictions · FP spectroscopic temperatures
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