The project aims to carry out a climatological analysis of the dynamics and structure of the Antarctic polar stratospheric vortex over the last decade 1993-2003 and its relationship with the 'Ozone (O3) hole' phenomenon. In particular will be evaluated all the data from the ground by LIDAR, gained by balloon and by satellite, a high resolution transport model and a GCM model will be used for the climatic characterization of the dynamics of the vortex and its interactions with the polar troposphere and mid-latitudes, and finally a climatology of aerosols and PSCs will be analyzed during the polar winter.