Author(s)

S. Eidels-Dubovoi

Abstract

Mie theory is used to calculate diurnal aerosol visible light (X = 0.50pm.) absorption and scattering patterns from particle size distributions measured in the diameter range 0.006 - 1.0pm., during February 16 - March 1, 1991, at three different sites in the Mexico City Valley. The calculated patterns showed variations even from one day to another at the same place but reaching the highest values in the morning between 9:07 hrs. and 10:40 hrs. and the lowest around 13:40 hrs. or 16:40 hrs. was the predominating trend. The degree at which aerosol light absorption contributes to the total aerosol light extinction is found to be of the order of that measured in highly polluted cities while the scattering contribution is found to be great enough to pro

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