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| Titel |
Investigation of inertia-gravity waves in the upper troposphere/lower stratosphere over Northern Germany observed with collocated VHF/UHF radars |
| VerfasserIn |
A. Serafimovich, P. Hoffmann, D. Peters, V. Lehmann |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 5, no. 2 ; Nr. 5, no. 2 (2005-02-04), S.295-310 |
| Datensatznummer |
250002343
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| Publikation (Nr.) |
 copernicus.org/acp-5-295-2005.pdf |
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| Zusammenfassung |
| A case study to investigate the properties of inertia-gravity waves in the upper
troposphere/lower stratosphere has been carried out over Northern Germany during the
occurrence of an upper tropospheric jet in connection with a poleward Rossby wave
breaking event from 17-19 December 1999. The investigations are based on the
evaluation of continuous radar measurements with the OSWIN VHF radar at
Kühlungsborn (54.1 N, 11.8 E) and the 482 MHz UHF wind
profiler at Lindenberg (52.2 N, 14.1 E). Both radars are separated by
about 265 km. Based on wavelet transformations of both data sets, the
dominant vertical wavelengths of about 2-4 km for fixed times as well as the
dominant observed periods of about 11 h and weaker oscillations with periods of
6 h for the altitude range between 5 and 8 km are comparable. Gravity
wave parameters have been estimated at both locations separately and by a complex
cross-spectral analysis of the data of both radars. The results show the appearance of
dominating inertia-gravity waves with characteristic horizontal wavelengths of
300 km moving in the opposite direction than the mean background wind and a
secondary less pronounced wave with a horizontal wavelength in the order of about
200 km moving with the wind. Temporal and spatial differences of the observed
waves are discussed. |
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