Research Habilitation University Pierre and Marie Curie Defended on 4 June 2007 by Bruno Sportisse Field : Geophysics Air Pollution Modeling and Simulation Jury composed of Matthias Beekmann CNRS reviewer Greg Carmichael University of Iowa, USA reviewer Katia Laval University Pierre and Marie Curie President Fran¸ cois-Xavier Le Dimet University Joseph Fourier reviewer Jan Verwer CWI, The Netherlands