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Ann. Geophys., 22, 701-704, 2004
www.ann-geophys.net/22/701/2004/
© European Geosciences Union 2004
Unexpectedly small semidiurnal tidal wind amplitudes in the mid-latitudemesopause region during September 2002
D. Kürschner1 and Ch. Jacobi2
1Institute of Geology and Geophysics, University of Leipzig, Talstr. 35, D-04103 Leipzig, Germany
2Institute of Meteorology, University of Leipzig, Stephanstr. 3, D-04103 Leipzig, Germany
Abstract. The mesopause region monthly mean winds and semidiurnal tidal amplitudes and phases over Central Europe have been measured at Collm Observatory since September 1982. The regular annual cycle of the semidiurnal tidal amplitudes show maximum values during late August and September. In contrast to that, in autumn 2002 no enhancement of the tidal amplitudes was measured, while the autumn tidal phase transition occurred unusually early.
Key words. Meteorology and atmospheric dynamics (middle
atmosphere dynamics; waves and tides; climatology)
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