Abstract
The quasi-biennial oscillation (further – QBO) is a quasi-periodic oscillation of the equatorial zonal wind between easterlies and westerlies in the tropical stratosphere with a mean period of 26 to 29 months. Together with other circulation mechanisms, the QBO comprises a global climate system which affects the climate indices of different regions of the globe including Lithuania. The authors of the present paper chose to address the issue of the anomalies of precipitation in Lithuania. The research encompasses the time frame from 1953 to 2009: relationship between the periods without precipitation 10 and more days, monthly precipitation sum and different phases of QBO. The highest statistically significant precipitation deviations according the QBO phase at the 30 hPa level were established in May, September and November. The anomalies of precipitation were found to be predetermined by the atmospheric circulation patterns.
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