Apport de l'observation satellitaire à l'analyse et à la prévision de la qualité de l'air

This paper presents what can be achieved with the use of satellite observations in the framework of atmospheric composition studies, including for air quality analysis and forecast. The different measurements currently available are presented with their main strengths and limitations. On the basis of examples from recent studies, the use and the gain obtained by these observations are discussed.This includes analysis of pollutant transport events, refinement of the databases used in the models, modeling of satellite observations and data assimilation. The recent Copernicus service is detailed in this context and the prospects for using these observations are finally explained.