ACP Atmospheric Chemistry and Physics ACP 1680-7324 Copernicus GmbH Göttingen, Germany 10.5194/acp-7-5479-2007 Technical Note: The air quality modeling system Polyphemus Mallet V. 1 3 Quélo D. 2 Sportisse B. 1 3 Ahmed de Biasi M. 1 3 Debry É. 3 Korsakissok I. 1 3 Wu L. 1 3 Roustan Y. 1 3 Sartelet K. 3 Tombette M. 3 Foudhil H. 3 INRIA, Paris-Rocquencourt Research Center, France IRSN, Fontenay-aux-Roses, France Université Paris-Est, CEREA (Joint Laboratory ENPC – EDF R&D), Marne la Vallée, France 26 10 2007 7 20 5479 5487 This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://www.atmos-chem-phys.net/7/5479/2007/acp-7-5479-2007.html The full text article is available as a PDF file from http://www.atmos-chem-phys.net/7/5479/2007/acp-7-5479-2007.pdf

Polyphemus is an air quality modeling platform which aims at covering the scope and the abilities of modern air quality systems. It deals with applications from local scale to continental scale, using two Gaussian models and two Eulerian models. It manages passive tracers, radioactive decay, photochemistry and aerosol dynamics. The structure of the system includes four independent levels with data management, physical parameterizations, numerical solvers and high-level methods such as data assimilation. This enables sensitivity and uncertainty analysis, primarily through multimodel approaches. On top of the models, drivers implement advanced methods such as model coupling or data assimilation.

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