| CNRS-NSF Workshop
on Transport and Mixing of reactive and non reactive flows in the Atmospheric Boundary Layer Paris, July 4, 2001 |
| Hauke Schmidt, Robert
Vautard and Nadege Blond Laboratoire de Meteorologie Dynamique, Ecole Polytechnique, Palaiseau Air Quality Simulations with the Multi-scale Chemistry Transport Model CHIMERE and its Adjoint Model CHIMERE is a Eulerian chemistry transport model system developed at the IPSL. It consists of a continental scale model and nested versions for different French regions (Paris, Alsace, Marseille) and is mainly aiming at the simulation of photosmog episodes. In the first part of this talk the model system, its applications and a model evaluation will be presented. The model is used for a daily forecast of air pollution (see the web site http://euler.polytechnique.fr/pioneer) on the basis of meteorological forecasts from different centers. The model evaluation is done by a comparison of mainly ozone observations of a large number of european observation sites with the model results both for re-simulations and forecasts. The influence of the different meteorological basis and different forecast lead times will be discussed. In the second part sensitivity studies with the adjoint of the continental part of CHIMERE will be presented. The main objectives of these studies are a) to determine the relative importance of different emitted precursor species for ozone levels and b) to estimate the influence of possible errors of a variety of model parameters on the model result. |