Simulation of extratropical synoptic-scale stratosphere-troposphere exchange using a coupled chemistry GCM : Sensitivity to horizontal resolution

The transport of ozone between the stratosphere and troposphere has been studied with a coupled chemistry GCM (ECHAM4) for two horizontal resolutions (T30: 3.75degree X 3.75degree and T63: 1.875degree X 1.875degree). The meteorological conditions pertain to the first half of March 1996, when a large amplification of waves in the upper troposphere resulted in the development of two upper-level subtropical cyclonic vortices in the Northern Hemisphere over the Atlantic Ocean.