We present the results of lidar observations of stratospheric aerosol perturbations for period July-November 2008, obtained at three lidar stations of the network CIS-LiNet in Tomsk, Minsk, and Vladivostok, as well as in Gobi desert during expedition measurements. We analyze the behavior of stratospheric profiles of scattering ratio R(Н) (ratio of the total aerosol and molecular backscattering coefficient to the molecular backscattering coefficient) at different wavelengths, characterizing the aerosol stratification in the stratosphere. Transport of air masses in the stratosphere is analyzed by the method of direct and back trajectories using the NOAA HYSPLIT MODEL. It is shown, that stratospheric aerosol perturbation are connected to explosive eruptions of volcanos of Aleutian islands Okmok (53.4°N, 168.1°W; July, 12, 2008) and Kasatochi (52.2°N, 175.5°W; August, 6-8, 2008).
stratosphere; volcanic aerosol; lidar