Correlation Analysis And Simulation Study Of Lidar Ratio And Depolarization Ratio Of Atmospheric Aerosols By Lidar Measurement

Lidar is an effective tool for remote sensing. Lidar ratio and depolarization ratio are imporant parameters of eerosols, and ther is a certain correlation between them. However,The they are generally studied separarely,which linni the deep study of aerosol light seattering properties. The light scarrring properties of non-spherical aerosols are studied by discrete dipale approximation(DDA), and then the correlation between lidar ratio and depolarization ratio is analyzed through correlation snalysis and data fitting. The research result is of great significance for fine classification of aerosols and fine inversion of aerosols' optical properties.First of all, the light scanering properties of single non-spberical particles with different shapes, orientation and complex refractivee iadex are analyzed The effects of axes ratio on lidar ratio and depolarization ratio of collections of aerosol prticles are studied. For dust aerosols,the lidar ratio increases first and then tends to stability with the increase of the axes ratio, and the depolarization ratio increases first, then decreases and remains stable. For soot aerosols, the lidar ratio and the depolarization ratio are not affected significantly by axes ratio,and both decrease whih the increase of the wavelength for water soluble aerosols,the lidar ratio increases slightly with the increases of the axes depolarization ration increases first and then remains ztable,and both parameters decrease with the increases of The lidar ratio and depolarization ratio of insoluble arosols at three wavelengths are almost are same, the lidar ratio increases with the increase of axes ratio, and the regularity between depolarization ratio and axes ratio is not obviousFinally, the effects of aerosol components on lidar ratio and depolarization ratio are researched. The Pearon correlation coefficient is used to verify the comelation between lidar ratio and depolarization ratio, and then fitting method is used to establish the correlation models. The results show that there is a negative correlation between lidar ratio and depolarization ratio of continental aerosols, the correlation between them can be described by the quadratic polynomial fitting model. There is a negative correlation between lidar ratio and depolarization ratio of desert aerosol, the correlation between them can be described by the linear fitting model.