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A multi-scale model for air quality forecasting and simulation

The CHIMERE multi-scale model is primarily designed to produce daily forecasts of ozone, aerosols and other pollutants and make long-term simulations (entire seasons or years) for emission control scenarios. CHIMERE runs over a range of spatial scale from the regional scale (several thousand kilometers) to the urban scale (100-200 Km) with resolutions from 1-2 Km to 100 Km.

The CHIMERE model is a free GNU licensed software made available on the Internet and developed in two IPSL laboratories (LMD and LISA) and at INERIS .

From prescribed meteorological fields and emission sources, it calculates hourly concentrations of several tens of pollutants (gaseous and particules) among whose some of the species that are subject to monitoring for air quality. These calculations are made in regional (3 km resolution, such as the Paris or mediterraen regions) to continental scales (resolution of one degree, Europe, Atlantic, ...). The rapidity of the calculation (the code is optimized and parallelized) allows for fine cases studies (episodes of a few days at high spatial resolution) and climatologies over a decade.

This numerical code, including its high scientific quality, is widely recognized and used by more than a hundred users in Europe (universities, industry, network of air quality) to satisfy both research objectives and to conduct daily forecasts (including in the framework PREVAIR ).

See the web site of CHIMERE

Map of surface ozone peaks calculated with the CHIMERE model. The figure shows the simulation for 28 July 2008 on Western Europe