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| Titel |
On the longitudinal structure of the transient day-to-day variation of the semidiurnal tide in the mid-latitude lower thermosphere - I. Winter season |
| VerfasserIn |
E. G. Merzlyakov, Yu. I. Portnyagin, C. Jacobi, N. J. Mitchell, H. G. Muller, A. H. Manson, A. N. Fachrutdinova, W. Singer, P. Hoffmann |
| 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 ; 19, no. 5 ; Nr. 19, no. 5, S.545-562 |
| Datensatznummer |
250014253
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| Publikation (Nr.) |
 copernicus.org/angeo-19-545-2001.pdf |
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| Zusammenfassung |
The longitudinal structure
of the day-to-day variations of semidiurnal tide amplitudes is analysed based on
coordinated mesosphere/lower thermosphere wind measurements at several stations
during three winter campaigns. Possible excitation sources of these variations
are discussed. Special attention is given to a nonlinear interaction between the
semidiurnal tide and the day-to-day mean wind variations. Data processing
includes the S-transform analysis which takes into account transient behaviour
of secondary waves. It is shown that strong tidal modulations appear during a
stratospheric warming and may be caused by aperiodic mean wind variations during
this event.
Key words. Meteorology and
atmospheric dynamics (middle atmosphere dynamics; waves and tides) |
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