AEROSOL PARTICLE SCAVENGING BY FOG AND HAZE DROPLETS

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Abstract

Summary

Droplet imprints in thin gelatin layers have been used for the investigation of coarse particles embedded in fog (haze) droplets in comparison to interstitial particles. Droplet samples were taken in less polluted regions of Missouri and Illinois and also in more polluted marine-urban environment in Italy. Considerable differences in particle size distribution and particle location inside the droplets have been found in samples collected on four sampling sites. The deduced relationships can be applied for the description of the aerosol scavenging process in fogs. The pollution of fog (haze) droplets may be related to the droplet mean volume radius and may depend on temperature and on atmospheric humidity. An orientative study of the deposited particle composition indicated important relationships between coarse particles of different origin (soil minerals, industrial and urban pollutants, sea salt).

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