Aerosol particle scavenging by fog and haze droplets

Droplet imprints in thin gelatin layers have been used for the investigatio n of coarse particles embedded in fog (haze) droplets in comparison to inte rstitial particles. Droplet samples were taken in less polluted regions of Missouri and Illinois and also more polluted marine-urban environment in It aly. Considerable differences in particle size distribution a,ld particle l ocation inside the droplets have been found in samples collected on four sa mpling sites. The deduced relationships can be applied for the description of the aerosol scavenging process bl fogs. The pollution of fog (haze) drop lets may be related to the droplet mean volume radius and may depend on tem perature and an atmospheric humidity. An orientative study of the deposited particle composition indicated important relationships between coarse part icles of different origin (soil minerals, industrial and urban pollutants, sea salt).