Abstract
The most intense disturbances of the winter-time west winds in the meteor region (i.e. temporal reversal to east winds) are of a large-scale character and have a well established connection with sudden stratospheric warmings. During these periods, strong coupling between stratosphere and mesopause exists. This is shown by daily radar meteor wind results of the stations Kühlungsborn (54.1° N: 11.8° E) and Obninsk (55°N: 38°E) during the four ‘Pre-MAP’ winters 1978/79–1981/82 and by comparison with satellite radiance data from the upper stratosphere. There were several cases, however, where the west wind in the meteor region at both stations markedly decreased, or even reversed, during periods of quiet or even extreme winter conditions in the stratosphere, e.g. in December 1979 and December 1980. The causes of these disturbances are not yet clear.
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