Abstract
The atmospheric aerosol particle size distribution was examined using measured spectral scattering coefficients in the wavelength region 0.40–2.27 μ. It was found that the aerosol on a particular day can be represented by a two-component composite, the main component having a Junge distribution of the form dN/d logr = Cr−n and the other having either a distribution of larger particles similar to that of aerosols found in maritime air or a relatively monodisperse distribution contained in a narrow radius interval. This study shows that estimates of aerosol size distribution may be in error if based only on attenuation measurements in the visible region.
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