| dc.description.abstract | Dual-wavelength, depolarization, and Raman Lidar observations for the tropospheric aerosols in the height region 1-5 km, using data of 126 days for background aerosols and 40 days for special aerosols events (dust and biomass burning) during the period 2002/2-2004/5, are presented in this paper. Lidar measurements revealed the optical properties, source, transport processes, seasonal variation, and humidity effect of aerosols. Data were analyzed in conjunction with Sun-photometer, Radiosonde, Visibility, satellite image (TOMS), and trajectory studies (HYSPLIT). The larger aerosols loading occurred below 3 km and had a distinct feature of seasonal variation. The maximum and minimum aerosol optical thickness, in the height region of 1-5 km, for the spring and fall seasons respectively. There are different characteristics for various aerosols which are recognized by using depolarization Lidar. The dust aerosols events have larger depolarization ratio varied mainly between 0.12 and 0.27. The height distribution of the particles size derived from the dual-wavelength Lidar. Raman Lidar measured the results of humidity were not only coincidence with Radiosonde but also had the potential to understand the interaction of aerosols and humidity. | en_US |