QBO Signal in Total Ozone over Tibet

From data analysis of ozone satellite observation and general circulation, this article discusses the sea-sonal and interannual variations of total ozone over Tibet. Analysis has been done on Quasi-Biennial Oscillation (QBO) in interannual ozone variation over Tibet, in comparison with QBO over the tropics and non-mountain region at the same latitudes of Tibet. The fact is shown that Tibet ozone QBO has an aver-aged period of 29 months, with an averaged amplitude of 8 DU. The Tibet ozone QBO is antiphase to the stratospheric wind QBO over the tropics, i.e., when the tropics 30 hPa-wind is easterly, ozone has a surplus, and vice verse. This article also discusses the impact of atmospheric transfer on ozone QBO over Tibet.