On the basis of the data of the emission and radiophysical measurements some regularities of quasi-biennial oscillation (QBO) of the atmospheric temperature at heights of the mesopause and lower thermosphere are investigated. It is shown, that they are closely connected with quasi-biennial variations of solar activity and form within the limits of a cycle of solar activity the fading wave train of fluctuations. Such behaviour of the wave train can be good described by the Airy function. The wave train arises during an ending of previous cycle of solar activity. Within the maximum of solar activity the period of fluctuations is ∼38 months and linearly (r=−0.98) decreases up to ∼21 months to the end of a 11-year cycle.
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Document Type: Research Article
Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, 119017 Moscow, Russia
Swedish Institute of Space Physics, Box 812, SE-981 28 Kiruna, Sweden
Abastumani Astrophysical Observatory, Georgian Academy of Sciences, 380060, Tbilisi, Georgia
Publication date: 2002-01-01
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