Phase-coherent oscillatory modes in solar and geomagnetic activity and climate variability |
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| Authors: | Milan Paluš Dagmar Novotná |
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| Affiliation: | 1. Saratov Branch of Institute of Radioengineering and Electronics of Russian Academy of Sciences, 38, Zelyonaya str., Saratov, Russia;2. Yuri Gagarin State Technical University of Saratov, 77, Politekhnicheskaya str., Saratov, Russia;3. Lobachevsky State University of Nizhny Novgorod, 23, Gagarina av., Nizhny Novgorod, Russia;4. Saratov State University, 83, Astrakhanskaya str., Saratov, Russia |
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| Abstract: | ![]()
Oscillatory modes with the period of approximately 7–8 yr were detected in monthly time series of sunspot numbers, geomagnetic activity aa index, NAO (North Atlantic Oscillation) index and near-surface air temperature from several mid-latitude European locations. Instantaneous phases of the modes underwent synchronization analysis and their statistically significant phase coherence, beginning from 1950s, has been observed. Thus the statistical evidence for a coupling between solar/geomagnetic activity and climate variability has been obtained from continuous monthly data, independent of the season, however, confined to the temporal scale related to oscillatory periods about 7–8 yr. |
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