AbstractThe radio wave absorption in the lower ionosphere measured in Central and Southern Europe is used to study long-term changes in the characteristics of planetary waves in the period range of 2–15 days. Such fluctuations in absorption were proved to be of non-solar origin /7/. No consistent pattern is found in variations of the dominant period of planetary waves with T = 2–15 days. Amplitudes in fixed period bands do not exhibit a trend in Central Europe but they show an evident positive trend (20–25% increase over 1980–1989) in Southern Europe. The results indicate a possibility of long-term trends in some characteristics of planetary waves at 80–100 km altitudes.
Changes in characteristics of planetary waves at 80–100 km over Central and Southern Europe since 1980
Advances in Space Research ; 11 , 3 ; 31-34
01.01.1991
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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