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<p><strong>Abstract.</strong> A correlation between solar activity and normalized occurrence rate of sudden stratospheric warmings (SSWs) has been found. As a proxy for solar activity, the 10.7&thinsp;cm solar radio flux has been used. In order to find the correlation, we derived a normalized occurrence rate of major sudden stratospheric warmings (MSSWs) based on both the ERA-40/ERA-Interim dataset and NCEP data. Based on this distribution, we calculated the correlation coefficient, whichdoi:10.5194/angeo-37-375-2019 fatcat:nwhmnxvodndodft35jgwdbdzqu