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The interaction between the factors of thequasi-biennial oscillation (QBO) and the 11-year solar cycle is considered as anseparate factor influencing the interannual January-March variations of totalozone over Northeastern Europe. Linear correlation analysis and the runningcorrelation method are used to examine possible connections between ozone andsolar activity at simultaneous moment the QBO phase. Statistically significantcorrelations between the variations of total ozone in February and, partially,in March, and the sunspot numbers during the different phases of QBO are found.The running correlation method between the ozone and the equatorial zonal winddemonstrates a clear modulation of 11-y solar signal for February and March.Modulation is clearer if the QBO phases are defined at the level of 50 hParather than at 30 hPa. The same statistical analyses are conducted also forpossible connections between the index of stratospheric circulation C1and sunspot numbers considering the QBO phase. Statistically significantconnections are found for February. The running correlations between the index C1and the equatorial zonal wind show the clear modulation of 11-y solar signal forFebruary and March. Based on the obtained correlations between the interannualvariations of ozone and index C1, it may be concluded that aconnection between solar cycle – QBO – ozone occurs through the dynamics ofstratospheric circulation

The sunspot cycle, the QBO, and the total ozone over Northeastern Europe: a connection through the dynamics of stratospheric circulation