Author(s)

H.R. Pruppacher

Abstract

The Importance of the Ice Phase to Atmospheric Chemistry Invited contribution H.R. Pruppacher Institute for Physics of the Atmosphere, University of Mainz, D-55099 Mainz, Germany A detailed study of recent literature shows that the ice phase in atmospheric clouds affects atmospheric chemistry in three ways: 1) The ice phase effects the atmospheric aerosol, 2) the ice phase effects the atmospheric trace gases, and 3) aerosol particles are responsible for the formation of the atmospheric ice phase in the first place. In the present summary we shall discuss the above mentioned three ways in succession (for details see Pruppacher and Klett, 1997). 1 Snow crystals remove atmospheric aerosol particles by impaction scavenging Four mechanisms are responsible for this removal: the Brownian motion the thermophoresis and diffusiophoresis acting if the snow cry

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