Haze and Fog Aerosol Distributions

Ralph G. Eldridge The MITRE Corporation, Bedford, Mass.

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Abstract

Spectral attenuation measurements through haze and fogs are used to synthesize aerosol distributions characteristic of the attenuating medium. Twelve fog drop-size distributions have been averaged into two general types of fogs for comparison with measured fog drop-size distributions and with a distribution predicted by theory. Seven time-phased fog drop-size distributions are used to illustrate the phenomena of droplet growth and fog degeneration. Finally, an empirical relationship between liquid water content and visual range is presented.

Abstract

Spectral attenuation measurements through haze and fogs are used to synthesize aerosol distributions characteristic of the attenuating medium. Twelve fog drop-size distributions have been averaged into two general types of fogs for comparison with measured fog drop-size distributions and with a distribution predicted by theory. Seven time-phased fog drop-size distributions are used to illustrate the phenomena of droplet growth and fog degeneration. Finally, an empirical relationship between liquid water content and visual range is presented.

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