Monitoring of an industrial area in southern Italy by using a multiwavelength lidar

A multiwavelength lidar system has been developed for air monitoring of an industrial area in southern Italy. The system based on two dye lasers pumpe d by a Nd:YAG allows us to perform differential absorption lidar measuremen ts in the UV spectral region together with measurements of water vapour, at mospheric transmissivity and aerosol load. The system has been designed to deliver simultaneously in the atmosphere the Nd:YAG fundamental and its har monics (II and III) as well as the output beams of two dye lasers. The retu rn signals, collected by means of two Newtonian telescopes, make it possibl e to retrieve information on atmospheric aerosols, water vapour and polluta ns concentration, density and transmissivity profiles. In this paper, we re port the preliminary results obtained in a measurement campaign performed i n the periods of November-December'98, and June-July'99.