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| Titel |
Nonmigrating tidal activity related to the sudden stratospheric warming in the Arctic winter of 2003/2004 |
| VerfasserIn |
D. Pancheva, P. Mukhtarov, B. Andonov |
| 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 (2009-03-02), S.975-987 |
| Datensatznummer |
250016432
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| Publikation (Nr.) |
 copernicus.org/angeo-27-975-2009.pdf |
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| Zusammenfassung |
| This paper is focused on the nonmigrating tidal
activity seen in the SABER/TIMED temperatures that is related to the major
sudden stratospheric warming (SSW) taking place in the Arctic winter of
2003/2004. The emphasis is on the nonmigrating diurnal tides observed in the
stratosphere and lower mesosphere which is usually accepted to be
insignificant in comparison with that in the upper mesosphere and
thermosphere. By using different independent spectral methods we found a
significant amplification in December–January of the following nonmigrating
24-h tides: zonally symmetric (s=0), eastward propagating with zonal
wavenumber 1 (E1), and westward propagating with zonal wavenumbers 2 and 3
(W2 and W3) tides. It has been found that the double peak nonmigrating tidal
amplifications located in the stratosphere (~40 km) and in the lower
mesosphere (~70 km) are a consequence of the maintained hydrostatic
relation. By detailed comparison of the evolution and spatial structure of
the nonmigrating diurnal tides with those of the migrating diurnal tide and
stationary planetary waves (SPWs) evidence for a SPW-migrating tide
interaction as a source of nonmigrating tides has been presented. Therefore,
the nonmigrating 24-h tides turn out to be an important component of the
middle atmosphere dynamics during the major SSW in the Arctic winter of
2003/2004. |
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