The wind regime of the mesosphere and lower thermosphere during the DYANA campaign—II. Semi-diurnal tide
| Autor: | J.C. Stoddart, N. A. Makarov, V.V. Sidorov, A.N. Fakhrutdinova, R. Schminder, Werner Singer, Yu.I. Portnyagin, A. H. Manson, A.M. Nikonov, Peter Hoffmann, R.R. Clark, G. Cevolani, R. P. Chebotarev, Dierk Kürschner, E.S. Kazimirovsky, H.G. Muller, V.D. Kokourov, Chris Meek |
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| Rok vydání: | 1994 |
| Předmět: |
Atmospheric Science
General Engineering Atmospheric sciences Physics::Geophysics law.invention Geophysics law Mesopause Wind regime General Earth and Planetary Sciences Environmental science Astrophysics::Earth and Planetary Astrophysics Thermosphere Radar Stratosphere Longitudinal wave General Environmental Science |
| Zdroj: | Journal of Atmospheric and Terrestrial Physics. 56:1731-1752 |
| ISSN: | 0021-9169 |
| DOI: | 10.1016/0021-9169(94)90007-8 |
| Popis: | Co-ordinated ground-based radar measurements carried out during the 15 January–15 March 1990 DYANA campaign at 14 different geographical sites have provided a good opportunity to investigate the characteristics of semi-diurnal tidal variations in the mesosphere/lower thermosphere over a wide spectrum of space/time scales. It is pointed out that significant differences of monthly mean tidal parameters observed at the various sites may be explained by latitudinal and longitudinal effects. Well-defined 2–3-week oscillations of the tidal parameters are found to be typical of all observational sites. Their estimated space scales do not contradict the hypothesis about a possible coupling between these oscillations and the low wave-number processes in the stratosphere. Tidal parameter oscillations with 2–5-day periods may be explained to be effects of the nonstationary processes with longitudinal wave numbers S > 3. |
| Databáze: | OpenAIRE |
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