Lidar ratios and AngstrOm exponents of continental,maritime,and desert aerosols were calculated to evaluate the effects of aerosol composition on these parameters.Their correlation was assessed using correlation analy...Lidar ratios and AngstrOm exponents of continental,maritime,and desert aerosols were calculated to evaluate the effects of aerosol composition on these parameters.Their correlation was assessed using correlation analysis and curve fitting.The Pearson correlation coefficient between the lidar ratio and the AngstrOm exponent was larger than 0.95 in all cases.We verified the reliability of the Pearson correlation coefficient using the significance test.The relationship between the lidar ratio and the Angstrom expo- nent of continental aerosol can be described by a cubic polynomial model;thus,the function relation between the change in lidar ratios at different laser wavelengths depends on the fitting coefficients and the AngstrOm exponent.The relationship between the lidar ratio and the AngstrOm exponent of both maritime and desert aerosols can be described by a linear model.In these aerosols,the linear change in lidar ratios at different laser wavelengths remains unaffected by the AngstrOm exponent.The changes in the lidar ratio in maritime aerosol at 355nm and 532nm are -0.7times and -0.18times that at 1064nm, respectively.For desert aerosol,the changes in the lidar ratio at 355nm and 532nm are 0.37 times and 1.88times that at 1064nm,respectively.展开更多
基金National Natural Science Foundation of China grants:No.61405158and No.41627807.
文摘Lidar ratios and AngstrOm exponents of continental,maritime,and desert aerosols were calculated to evaluate the effects of aerosol composition on these parameters.Their correlation was assessed using correlation analysis and curve fitting.The Pearson correlation coefficient between the lidar ratio and the AngstrOm exponent was larger than 0.95 in all cases.We verified the reliability of the Pearson correlation coefficient using the significance test.The relationship between the lidar ratio and the Angstrom expo- nent of continental aerosol can be described by a cubic polynomial model;thus,the function relation between the change in lidar ratios at different laser wavelengths depends on the fitting coefficients and the AngstrOm exponent.The relationship between the lidar ratio and the AngstrOm exponent of both maritime and desert aerosols can be described by a linear model.In these aerosols,the linear change in lidar ratios at different laser wavelengths remains unaffected by the AngstrOm exponent.The changes in the lidar ratio in maritime aerosol at 355nm and 532nm are -0.7times and -0.18times that at 1064nm, respectively.For desert aerosol,the changes in the lidar ratio at 355nm and 532nm are 0.37 times and 1.88times that at 1064nm,respectively.
