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

摘要

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 tin the angle interval of 0-80). 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 20c%. # 1997 Optical Society of America