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| Titel |
Inertia-gravity waves in the troposphere and lower stratosphere associated with a jet stream exit region |
| VerfasserIn |
L. Thomas, R. M. Worthington, A. J. McDonald |
| 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 ; 17, no. 1 ; Nr. 17, no. 1, S.115-121 |
| Datensatznummer |
250013649
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| Publikation (Nr.) |
 copernicus.org/angeo-17-115-1999.pdf |
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| Zusammenfassung |
Radar measurements at Aberystwyth (52.4°
N, 4.1° W) of winds at tropospheric and lower stratospheric
heights are shown for 12-13 March 1994 in a region of highly curved flow,
downstream of the jet maximum. The perturbations of horizontal velocity have
comparable amplitudes in the troposphere and lower stratosphere with downward
and upward phase propagation, respectively, in these two height regions. The
sense of rotation with increasing height in hodographs of horizontal
perturbation velocity derived for hourly intervals show downwards propagation of
energy in the troposphere and upward propagation in the lower stratosphere with
vertical wavelengths of 1.7 to 2.3 km. The results indicate inertia-gravity
waves propagating in a direction similar to that of the jet stream but at
smaller velocities. Some of the features observed contrast with those of
previous observations of inertia-gravity waves propagating transverse to the jet
stream. The interpretation of the hodographs to derive wave parameters has taken
account of the vertical shear of the background wind transverse to the direction
of wave propagation.
Key words. Meteorology and atmospheric dynamics
(mesoscale meteorology; middle atmosphere dynamics; waves and tides) |
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