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RADAR OBSERVATIONS OF INERTIA-GRAVITY WAVES OVER NORTHERN GERMANY
A. Serafimovich, P. Hoffmann, D. Peters et al.
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Session: I.4 |
Type: Oral Projectors: -Overhead-Multimedia- |
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Andrei Serafimovich, Peter Hoffmann, Dieter Peters Leibniz-Institut für Atmosphärenphysik, Kühlungsborn, Germany Volker Lehmann Deutscher Wetterdienst, Meteorologisches Observatorium, Lindenberg, Germany An inertia-gravity wave event over Northern Germany between the 17 and the 19 December 1999 is investigated. It has been recently shown (Peters et al, 2003), that these waves are generated by an upper tropospheric jet in connection with a poleward Rossby wave breaking event. The properties of the inertia gravity waves are analysed by continuous VHF radar measurements with the OSWIN radar at Kühlungsborn (54.1°N, 11.8°E) and supplemented by a series of 3 hrly-radiosonde ascents. The diagnostic results based on a linear theory show a characteristic horizontal wavelength of about 890 km and a vertical wavelength of about 2-3 km in the stratosphere and about 3.3 km in the troposphere. In addition, the spatial structure of these waves is studied with help of the data of the 482 MHz wind profiler at Lindenberg (52.2°N, 14.1°E), separated by about 300 km from the Kühlungsborn radar. Based on wavelet transformations of both data sets, the dominant vertical wavelengths for constant times as well as the dominant periods for constant altitudes are comparable. Temporal and spatial differences of the observed waves are discussed using the results of complex cross-spectral analyses of the results of both radars. |
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First Author |
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| Name | Serafimovich, Andrei |
| Affiliation | Leibniz-Institut für Atmosphärenphysik, Kühlungsborn |
| Country | Germany |
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Second Author |
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| Name | Hoffmann, Peter |
| Affiliation | Leibniz-Institut für Atmosphärenphysik, Kühlungsborn |
| Country | Germany |
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Third Author |
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| Name | Peters, Dieter |
| Affiliation | Leibniz-Institut für Atmosphärenphysik, Kühlungsborn |
| Country | Germany |
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Presenting Author |
Second Author |
| Name | Hoffmann, Peter |
| hoffmann@iap-kborn.de | |
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©2002 MST10 Workshop |