Abstract
In this work we continue studying possible reasons for the temporal variability of long-term effects of solar activity (SA) and galactic cosmic ray (GCR) variations on the lower atmosphere circulation. It was shown that long-term oscillations of the amplitude and sign of SA/GCR effects on troposphere pressure at high and middle latitudes are closely related to the state of a cyclonic vortex forming in the polar stratosphere. A roughly 60-yr periodicity was revealed in the vortex strength affecting the evolution of the large-scale atmospheric circulation and the sign of SA/GCR effects. The results obtained suggest an important part of the polar vortex in the mechanism of SA/GCR influence on the troposphere circulation.
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