PRELIMINARY ANALYSIS ON LIDAR OBSERVATIONS OF STRATOSPHERIC AEROSOL OVER WUHAN

By using the observations obtained by Wuhan University Lidar system at 589 nm wavelength, vertical profile of aerosol extinction coefficient and temporal behavior of the integrated aerosol backscattering coefficient in the low stratosphere are preliminarily analyzed from March 2001 to January 2002. The analysis results show that there is an aerosol layer between 16 km to 20 km in the lower stratosphere over Wuhan (30.5°N, 114.4°E), and aerosol layer width and maximum scattering ratio shows a seasonal variations. Temporal behavior of the integrated backscattering coefficient of stratospheric aerosol shows a seasonal variations trend, also. The variation range is between 2.2 × 10^-5sr^-1 to 7.0 × 10^-4sr^-1. They reach their maximum value in summer and minimum value in winter, respectively.