Determination of the aerosol particle-size distribution from simultaneous data on spectral attenuation and the small-angle phase function

Abstract

Retrieval of the aerosol particle distribution function in the marine atmospheric boundary layer for a radius interval as great as 30 µm is considered with the use of simultaneous data on the spectral attenuation (in the spectral range of 0.4–5 µm) and small-angle phase function (in the angle interval of 0–8°). An iterative procedure is constructed combining inversion algorithms for the spectral attenuation and phase function, each being efficient for a specific particle-size interval. Numerical experiments with two aerosol models are performed. The effect of random errors of the small-angle phase function is considered for different angular resolutions. It is shown that, given certain conditions, the inversion methodology under discussion makes it possible to retrieve the particle-size distribution function for the radius interval of 0.2–30 µm with a mean relative error of less than 10% and a maximum deviation not exceeding 20%.

© 1997 Optical Society of America

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