Geoscientific Model Development Discussions www.geosci-model-dev-discuss.net 1991-9611 1991-962X 1 1 2008 10.5194/gmdd-1-381-2008 http://www.geosci-model-dev-discuss.net/1/381/2008/ http://www.geosci-model-dev-discuss.net/1/381/2008/gmdd-1-381-2008.html http://www.geosci-model-dev-discuss.net/1/381/2008/gmdd-1-381-2008.pdf 381 432 2008-12-12 Evaluation of the new UKCA climate-composition model – Part I: The stratosphere O. Morgenstern o.morgenstern@niwa.co.nz P. Braesicke F. M. O'Connor A. C. Bushell C. E. Johnson S. M. Osprey J. A. 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