Author(s)

K. Acker, S. Naumann, D. Moller, W. Wieprecht & A. Oestreich

Abstract

Experimental findings for heterogeneous ozone destruction in clouds at Mount Brocken K. Acker, S. Naumann, D. Moller, W. Wieprecht, A. Oestreich Brandenberg Technical University Cottbus, Working Group for Air Chemistry, Rudower Chaussee 5, D-12484 Berlin, Germany ABSTRACT Our preliminary data from the Mt. Brocken Cloud Chemistry Monitoring Program (BROCCMON) show that an understanding of tropospheric ozone balance would be incomplete without consideration chemical processes within clouds. In the continuous record of ozone concentration since 1992 we often observed an ozone depletion with passing clouds. Based on more than thousand analyzed cloud water samples from cloud events in 1992 and 1993 we selected those with related information on atmospheric composition, meteorology, cloud characteristics and back trajectories for more detailed investigation of the observed ozone behaviour. We conclude that clouds principally act as sinks for tropospheric ozone, however, with dif

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