The stratospheric polar vortex as a cause for the temporal variability of solar activity and galactic cosmic ray effects on the lower atmosphere circulation

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.