Author(s)

Robert Vautard, Matthias Beekmann and Cecile Honore

Abstract

We develop an urban photochemical simplified model. This model works as a full 3D model but the concentration of simulated species are averages within large atmospheric boxes of the urban boundary layer. This model has the advantage of being computer-time costless. It is particularly suited for the Paris area. The originality of the application of the model presented here is that it is used in inverse mode. That is, we use the model to diagnose the upstream concentrations of ozone that make the model simulation fit some observed concentrations in the urban area. The inverse modeling requires the development of the adjoi

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