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| Titel |
Gravity wave generation and propagation during geomagnetic storms over Kiruna (67.8°N, 20.4°E) |
| VerfasserIn |
P. R. Fagundes, A. L. Aruliah, D. Rees, J. A. Bittencourt |
| 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 ; 13, no. 4 ; Nr. 13, no. 4, S.358-366 |
| Datensatznummer |
250011816
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| Publikation (Nr.) |
 copernicus.org/angeo-13-358-1995.pdf |
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| Zusammenfassung |
| Atmospheric gravity waves, detected over
Kiruna (67.8°N, 20.4°E) during geomagnetic storms, are presented and analysed.
The data include direct measurements of the OI 630.0 nm emission line intensity,
the x-component of the local geomagnetic field and thermospheric (meridional
and zonal) wind velocities derived from the OI 630.0 nm Doppler shift observed
with an imaging Fabry-Perot interferometer (IFPI). A low pass band filter
technique was used to determine short-period variations in the thermospheric
meridional wind velocities observed during geomagnetic storms. These
short-period variations in the meridional wind velocities, which are identified
as due to gravity waves, are compared to the corresponding variations observed
in the OI 630.0 nm emission line intensity, x-component of the local
geomagnetic field and the location of the auroral electrojet. A
cross-correlation analysis was used to calculate the propagation velocities of
the observed gravity waves. |
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