Observations of the seasonal variations of the tropospheric aerosols optical properties by high-spectral-resolution lidar over Tsukuba, Japan

This paper reports on the results of measurements of the aerosols and the clouds optical properties in the troposphere over Tsukuba, Japan (104.12°E, 36.05°N, 27 above sea level). We carried out the experiments using a high-spectral resolution lidar based on iodine absorption filter with a working wavelength 532 nm and have the opportunity of polarization characteristics of the lidar signal. The results from simultaneously observations of particle backscatter and extinction profiles, lidar ratio (extinction to backscatter ratio) and depolarization ratio during on the four annual seasons are presented. We analyzed the seasonal variations of the particle backscatter, extinction and lidar ratio to investigate climatology of aerosol optical properties, and especially lidar ratio, over this region. The experimental results are compared with results obtained over another places and techniques.