Regular measurements were carried out since 2006 till 2009 at the lidar stations in Teplokluchenka (Kyrgyz Republic, 42°N, 78°E) and Tomsk (RF, 56°N, 85°E) in the frameworks of the project CIS-LiNet – lidar network on the territory of CIS. We present the results of statistical analysis of the spectral characteristics of optical parameters – backscattering and extinction coefficient, optical thickness and the lidar ratio (the parameter inverse to the value of the scattering phase function at 180°) in the planetary boundary layer and the free troposphere.
Proc. SPIE. 6733, International Conference on Lasers, Applications, and Technologies 2007: Environmental Monitoring and Ecological Applications; Optical Sensors in Biological, Chemical, and Engineering Technologies; and Femtosecond Laser Pulse Filamentation
Regular measurements of tropospheric aerosol parameters have been performed from January 2002 to May 2007 at Lidar
Station Teplokluchenka, Kyrgyzstan (42.40° N, 78.50° E). A combined multiwavelength and Raman lidar was used to
measure profiles of the aerosol backscatter and extinction coefficients, depolarization ratio and structure of the planetary
boundary layer. The statistical analysis of aerosol optical properties was made both for the planetary boundary layer and
for the free troposphere. Data on the aerosol backscatter profiles, which characterize a typical variation of vertical
aerosol distribution, were selected for analysis. The results show seasonal values of the aerosol backscatter coefficient
and the backscatter ratio in a mountainous region of Central Asia. Mean aerosol optical characteristics are estimated.
Diurnal cycles of the planetary boundary layer optical characteristics are also presented.
The particularities variability of optical and microphysical characteristics of the dust aerosol are revealed. The particle
size distribution function and the complex refractive index have been found using the measurements of the aerosol
backscattering coefficient at three wavelengths and the extinction coefficient at one wavelength. The dust events
contribute significantly to very large aerosol backscatter and extinction coefficients in the boundary layer. The large
masses of the dust aerosol are transported from Aral Sea basin and Middle East.