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Pierre Herckes Colloquium Abstract (Aug 23, 2017)

Clouds and Fogs in the Earth System

Clouds and fogs are common occurrences of water in Earth atmosphere. In the lower atmosphere these water droplets substantially impact the composition of the troposphere by interacting, transforming and, sometimes, removing gases and particles. This processing of atmospheric components by fogs and clouds has impacts in terms of climate, biogeochemical fluxes and even air pollution.

This presentation will give a short overview of the basic principles involved in fog and cloud chemistry and the tools used to study clouds and fogs. The enhancement of material deposition fluxes through occult deposition by fogs and clouds will be discussed. Finally some results from recent ASU studies, investigating the interplay between clouds and air pollution, will be shown.