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Atmospheric and Oceanic Optics

2013 year, number 4

Peculiarities of determining the aerosol microstructure parameters from measurements of the aerosol optical depth. Part II. Results of inversion

V.V. Veretennikov, S.S. Men’shchikova
Keywords: aerosol microstructure, aerosol optical depth, inverse problem


Microstructure parameters of the atmospheric aerosol restored from spectral measurements of the aerosol optical depth are considered. The experiments are carried out in summer season in Tomsk. The results have been obtained using two algorithms for solving the inverse problem, basic one and its version presented in the first part of the paper. The integral distribution method is implemented in the basic algorithm. The modified algorithm possesses the advantages of the integral distribution method and enables one to increase the accuracy of the estimated contribution of the fine particles in the aerosol microstructure. The statistical data on restored parameters are presented. These data are obtained for the whole particle ensemble and for its submicron and coarse fractions. It was established that the modified algorithm allowed the volume concentration of the submicron aerosol to be taken into account additionally up to 47%. At the same time the solution correction in the fine fraction range results in the decrease of the mean radius of the submicron particles from 0.16 to 0.10 micrometers.