Abstract:
The influence of the upper limit λmax of the spectral range, in which atmospheric transmission measurements are performed, on retrieving aerosol microstructure parameters is investigated. Aerosol microstructure parameters are determined by solving the inverse sun photometry problem using data of numerical simulation and field experiments. The aerosol model formed by fine (f) and coarse (c) particle fractions is used in the numerical experiment. The value of lmax is chosen in the range from 1.052 to 3.973 mm. The method of integral distributions is used for solving the inverse problem. It is shown that the contribution of large particles to the total aerosol distribution is underestimated. In particular, at λmax = 1.246 mm, the losses in the retrieval of concentration of c-particle fraction can achieve 42% against the 18% decrease in the aerosol volume concentration.
Keywords:
aerosol optical depth, aerosol microstructure, inverse problem
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