Simulation of Retrieving the Aerosol Size Distribution from the Multi-Wavelength Optical Parameters

摘要

Simulation of retrieving bimodal log-normal aerosol size distribution is accomplished using the algorithm of nonlinear optimal estimation with the aerosol optical parameters combined with three aerosol backscattering coefficients in 355nm, 532nm 1064nm wavelength (3β) and two extinction coefficients in 355nm, 532nm wavelength (2a). The results show that the parameters characterized the bimodal log-normal function can be successfully retrieved using this algorithm of high accuracy and stability. Given the ±10% uncertainty of the prior value the retrieving results error of the total number of particles and the effective radius are 9.4%, 19% and 9.5%, 22.1% respectively in Bimodal 1 and Bimodal 2. And the geometrical standard deviation brings greater error.