Urban Aerosols Survey Using LIDAR and Numerical Model

In this paper we present the monitoring of an aerosol smog episode in urban area (Lyon, France). The maximum charge of aerosol in the atmosphere was about 2200T which find its origin principally in the traffic emission. A Lidar apparatus, network analyzers and numerical model were used to characterize the spatial and time distribution of the urban aerosol. By assuming an aerosol size distribution a quantitative map of the aerosol in the atmosphere could be retrieved from the optical data. Comparison between Lidar data and PM10 standard analyzers had shown a relative good correlation near ground level. Air masses trajectories from ADMS model output and Lidar observation has been used to evaluated the local impact of the urban aerosols emission.