Ultrafine particle scavenging coefficients calculated from 6 years field measurements

Abstract

Abstract Based on 6 years of outdoor measurements at a boreal forest site in Southern Finland, scavenging coefficients were calculated for aerosol particles having diameter between 10 and 510 nm . Median scavenging coefficients varied between 7×10−6 and 4×10 −5 s −1 in this size-range. The dependence of scavenging coefficients on rain intensity was studied, and the scavenging coefficients were parameterized as a function of particle size for particle diameters of 10– 500 nm and for rain intensities 0– 20 mm h −1 .