ANALYSIS OF THE ANNUAL VARIATION OF TROPO SPHERIC AND STRATOSPHERIC OZONE DERIVED FROM OZONESONDE DATA

The comprehensive analysis of annual variation in the latitude-height field of ozone mixing ratios is performed on the basis of ozone soundi ngs at 28 stations of the World ozone measuring network. Using differe nt characteristics of the annual variation and applying various method s of analysis peculiarities and common features of the intra-annual ev olution of ozone are revealed in the middle and lower stratosphere, th e free troposphere and the atmospheric boundary layer in the Arctic, A ntarctic, middle and subtropical latitudes of the Northern Hemisphere (NH), middle latitudes of the Southern Hemisphere (SH). Essential diff erences are noted in the ozone intra-annual evolution between the Arct ic and the Antarctic. Their possible mechanisms are discussed. The est imate is obtained of the cross-tropopause ozone flux responsible for t he large increase in the tropospheric ozone content in the NH extratro pical latitudes in March - April.