Scavenging of aerosol particles by precipitation.

Abstract

Airborne measurements have been made of aerosol particle size distributions (more than 0.01micrometre) in aged air masses, in the plumes form several coal power plants and a large Kraft paper mill, and in the emissions from a volcano, before and after rain or snow showers. The measurements agree well with theoretical calculations for aerosol particles more than 1micrometre, but for the submicron aerosol particles the scavenging collection efficiencies are generally much higher, and the region of very low scavenging efficiencies (the 'scavenging gap') much narrower, than current theories predict. -from Authors