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Rainfall fluctuations and sunspot variability

Niederschlagsschwankungen und Sonnenfleckenveränderlichkeit

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Summary

Mean monthly values of sunspot relative numbers and 290 precipitation records are investigated and compared by means of power-spectrum, numerical band-pass filter and cross-spectrum analysis. Spectral-analysis of variance and numerical bandpass filtering indicate significant cyclical variance components in the time scale of solar activity at some stations. Cross-spectral computations show however, that these series are uncorrelated with sunspots when viewed in a wide geographically distribution.

Zusammenfassung

Mittlere monatliche Sonnenfleckenrelativzahlen und 290 Niederschlagszeitreihen werden mit den Verfahren der Varianzspektrum-, numerischen Bandpaßfilter- und Kreuzspektrumanalyse auf Verknüpfungen untersucht. Die Varianzspektren und die numerische Bandpaßfllterung liefern für einige Stationen signifikante zyklische Schwankungen auf der Zeitskala der solaren Aktivität. Die Kreuzspektrumanalyse ergibt jedoch unter Berücksichtigung der großräumigen Verteilung keine Korrelation zwischen den Niederschlagszeitreihen und den Sonnenflecken.

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Authors and Affiliations

  1. Institut für Meteorologie und Klimatologie, Universität Hannover, Herrenhäuserstraße 2, D-3000, Hannover, 21, Germany

    H. E. Fleer

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Fleer, H.E. Rainfall fluctuations and sunspot variability. Arch. Met. Geoph. Biocl., Ser. B 30, 73–85 (1982). https://doi.org/10.1007/BF02323395

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