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www.geosci-model-dev-discuss.net/3/769/2010/
doi:10.5194/gmdd-3-769-2010
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under the Creative Commons Attribution 3.0 License.
The Lagrangian chemistry and transport model ATLAS: simulation and validation of stratospheric chemistry and ozone loss in the winter 1999/2000
Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
Abstract. ATLAS is a new global Lagrangian Chemistry and Transport Model (CTM), which includes a stratospheric chemistry scheme with 46 active species, 171 reactions, heterogeneous chemistry on polar stratospheric clouds and a Lagrangian denitrification module. Lagrangian (trajectory-based) models have several important advantages over conventional Eulerian models, including the absence of spurious numerical diffusion, efficient code parallelization and no limitation of the largest time step by the Courant-Friedrichs-Lewy criterion. This work describes and validates the stratospheric chemistry scheme of the model. Stratospheric chemistry is simulated with ATLAS for the Arctic winter 1999/2000, with a focus on polar ozone depletion and denitrification. The simulations are used to validate the chemistry module in comparison with measurements of the SOLVE/THESEO 2000 campaign. A Lagrangian denitrification module, which is based on the simulation of the nucleation, sedimentation and growth of a large number of polar stratospheric cloud particles, is used to model the substantial denitrification that occured in this winter.
Discussion Paper (PDF, 1935 KB) Supplement (46412 KB) Interactive Discussion (Closed, 5 Comments) Final Revised Paper (GMD)
Notice on Discussion StatusCitation: Wohltmann, I., Lehmann, R., and Rex, M.: The Lagrangian chemistry and transport model ATLAS: simulation and validation of stratospheric chemistry and ozone loss in the winter 1999/2000, Geosci. Model Dev. Discuss., 3, 769-817, doi:10.5194/gmdd-3-769-2010, 2010. Bibtex EndNote Reference Manager XML
