Retrieving aerosol mass concentration vertical distribution in north suburb area of Nanjing city

Routine tests were conducted by using RamanMie lidar in the northern suburb of Nanjing.Through the analysis of the lidar echo sinal,aerosol mass concentration profile was inversed with the aid of aerosol mass concentration of linear model and exponential model.In order to improve the accuracy of the inversion,first of all,the Mie scattering signal near field was corrected,eliminating the influence of overlap factor.And denoising methods were used to deal with Raman scattering signal such as wavelet analysis.Secondly the Mie scattering signal was used to inverse the 0~3 km atmospheric aerosol mass concentration,the Raman scattering signal was used to inverse the 3 km~10 km atmospheric aerosol mass concentration,and then the two signals were spliced.Experimental results show that the correlation coefficient of aerosol mass concentration in different time is 0.991 and 0.973 6 inversed with two kinds of models, which is reliable.