The session will cover all aspects of stratospheric ozone and other minor species in the polar regions as well as all aspects of polar stratospheric clouds. Special emphasis is given to results from recent polar campaigns, including observational and model studies. Results from projects related to the International Polar Year are welcome.

We encourage contributions on chemistry, microphysics, radiation, dynamics, small and large scale transport phenomena, meso-scale processes and polar-midlatitudinal exchange. In particular, we encourage contributions on ClOx/BrOx chemistry, chlorine activation, NAT nucleation mechanisms and on transport and mixing of processed air to lower latitudes.

We welcome contributions on polar aspects of ozone/climate interactions, including empirical analyses and coupled chemistry/climate model results and coupling between tropospheric climate patterns and high latitude ozone.

In particular, we would like to solicit contributions in support of the SPARC initiatiative "The Role of Halogens in Ozone Depletion" that provide new qualitative and quantitative evidence from the laboratory, field observations and modelling studies that link ozone depletion to PSC microphysics and chlorine/bromine activation.