Author(s)

Harry M. ten Brink

Abstract

Aerosol Particles: Composition and Size Determine Their Importance !? A contribution from the coordinator of subproject AEROSOL Harry M. ten Brink ECN, PO Box 1, 1755 ZG Petten, the Netherlands As indicated in the title by exclamation and question mark, composition and size of aerosols should be governing parameters for their influence in a variety range of environmental problems such as: * respiratory diseases; * optical effects: visibility impairment and reflection of sunlight; * eutrofication of remote areas. Aerosol particles are also important vehicles in atmospheric physics and chemistry because they serve as the surface on which heterogeneous reactions of gases take place and, more importantly, without aerosols there would not be cloud formation. Furthermore aerosol material is an end product of photochemical reaction sequences of gaseous trace components like nitrogen oxide and organ

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