QBO signal in total ozone over Tibet

From data analysis of ozone satellite observation and general circulation, this article discusses the seasonal and interannual variations of total ozo ne over Tibet. Analysis has been done on Quasi-Biennial Oscillation (QBO) i n interannual ozone variation over Tibet, in comparison with QBO over the t ropics and non-mountain region at the same latitudes of Tibet. The fact is shown that Tibet ozone QBO has an averaged period of 29 months, with an ave raged amplitude of 8 DU. The Tibet ozone QBO is antiphase to the stratosphe ric wind QBO over the tropics, i.e., when the tropics 30 hPa-wind is easter ly, ozone has a surplus, and vice verse. This article also discusses the im pact of atmospheric transfer on ozone QBO over Tibet.