Determination of the atmospheric aerosol model by ground-based spectral extinction measurements

A method to determine the atmospheric aerosol model from the spectral relationships of aerosol optical thickness was presented in this paper.The atmospheric aerosol optical thickness were computed by 6S atmospheric radiative transfer model at multiple spectral bands for continental,maritime,urban aerosol model and Junge power-law model.The values computed were compared with the observed values.Then the most suitable atmospheric aerosol model among the several aerosol models was determined by minimizing the standard deviation between the observed values and those of computed values.This method was applied to the data from the sun-photometer measueements in the outskirt of Beijing in 2004.The results show that the actual atmospheric aerosol model was close to urban aerosol model.The proposed method can be employed to determine the atmospheric aerosol model based on the observation of multi-spectral aerosol optical thickness.