Influence of solar activity on the cyclic variations of precipitation in the Baltic region
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Abstract
We discuss the influence of solar activity on pluvial precipitation from time series of Lithuania (1910-1993) and Estonia (1866-1993), and using data of sunspots areas (1866-1993). By means of autoregressive and spectral methods for monthly and annual series we obtain significant cycles for solar and terrestrial processes with periods of 6 and 12 months, and 2.5 and 11 years. The analysis of the annual series of Estonian precipitation and sunspot areas features changes in the 11 year cycle, reduced to 9 years between 1915 and 1956; also, a significant oscillation with a period of 5 years in the last 6 decades was determined. The co- spectra of the solar and climatic processes agree with other works and support the common nature of all cycles and the influence of the solar activity on the climate variability.
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