The size distribution of primary biological aerosol particles in cloud water on the mountain Kleiner Feldberg/Taunus(FRG)

During the field campaign, FELDEX 95 cloud water samples were collected and the insoluble particles were analysed by single particle analysis in order to determine the content of primary biological aerosol particles (PBAP). I t is found that 25% of the total insoluble particles are biological ones. D uring cloud events with increasing wind velocity, the concentration of biol ogical particles also increases. Anthropogenic influence leads to a higher amount of both total and biological particles. Within the size distribution , the percentage of biological particles decreases with increasing radius. (C) 2000 Elsevier Science B.V. All rights reserved.