Author(s)

S.H. Ehrman B. Frey, M. Schwikowski U. Baltensperger and H.W. Gaggeler

Abstract

Imaging and Analysis of Individual Snow Crystals A contribution to subproject PROCLOUD S.H. Ehrman\ B Frey^, M. Schwikowski\ U. Baltensperger* and HW Gaggeler* ^Paul Scherrer Institute, CH-5232 Villigen, Switzerland ^Swiss Federal Institute for Forest, Snow, and Landscape Research, Zuricherstrasse 111, CH-8903 Birmensdorf, Switzerland Introduction Scavenging of aerosol particles by ice crystals is an important mechanism for removal of pollutants from the atmosphere. Because of the multiple scavenging processes which can occur, including nucleation, inertial impaction, Brownian motion, and accretion of supercooled cloud droplets (riming), the relationship between the concentrations of pollutants in the atmosphere and in bulk snow is quite complex (Pruppacher and Klett, 1980, Mitchell and Borys, 1992, Baltensperger et al., 1993). Analysis of individual ice crystals As a first s

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