Author(s)

D. Moller, K. Acker, W. Wieprecht & G. Mauersberger

Abstract

Heterogenous ozone destruction within clouds D. Moller, K. Acker, W. Wieprecht, G. Mauersberger Fraunhofer-Institut fur Atmosphdrische Umweltforschung, Institutsteil Berlin (ELC), Rudower Chaussee 5, D-12489 Berlin, Germany ABSTRACT This paper presents experimental results from the cloud measuring station on the Brocken in the Harz Mountains in Germany, showing an ozone depletion with passing clouds. We find during many cloud events that the ozone concentration is up to 50% less when compared to that before and after the cloud. Those clouds with a capacity to destroy ozone are characterized as chemically polluted clouds. INTRODUCTION Ozone is the key of atmospheric photooxidant. It is formed in the troposphere via NO2 photolysis, and carbon monoxide and hydrocarbons are indirect precursors in a complex reaction cycle. The ground based ozone concentration has increased during the last three or four decades by up t

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