This session examines dynamical links between the Stratosphere and Troposphere and is particularly interested in the impact of Stratospheric conditions on the Tropospheric flow. Submissions which examine dynamical mechanisms for this link are particularly welcome. Furthermore, there has been a great deal of recent work which examines how an improved understanding of the Stratosphere, and its representation in numerical models, might enhance our knowledge of Tropospheric predictability. We encourage submissions which examine the predictability of the Stratosphere-Troposphere system particularly on seasonal and climate timescales.