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Cirrus clouds above Zurich's local mountain Uetliberg (871m). Cirrus clouds exist in the upper troposphere, at altitudes between 7 and 17 km. Because cirrus clouds cover up to 30% of the Earth surface they play an important role in atmospheric chemistry and climate (photo: SPARC Office; feel free to provide photos for future SPARC newsletters).

R. Atkinson, D. L. Baulch, R. A. Cox, J. N. Crowley, R. F. Hampson, R. G. Hynes, M. E. Jenkin, M. J. Rossi, and J. Troe Air Pollution Research Center, University of California, Riverside, California 92521, USA School of Chemistry, University of Leeds, Leeds LS2 9JT, UK Centre for Atmospheric Science, Dept. of Chemistry, University of Cambridge, Lensfield Road Cambridge CB2 1EP, UK Max-Planck-In...

Impact of reactive bromine chemistry in the troposphere R. von Glasow , R. von Kuhlmann, M. G. Lawrence, U. Platt, and P. J. Crutzen 3 Institute for Environmental Physics, Universität Heidelberg, Germany Center for Atmospheric Sciences, Scripps Institution of Oceanography, University of California, San Diego, USA Atmospheric Chemistry Division, Max-Planck-Institut für Chemie, Mainz, Germany Rec...

We present the new scavenging scheme SCAV, simulating the removal of trace gases and aerosol particles by clouds and precipitation in global atmospheric chemistry models. The scheme is quite flexible and can be used for various purposes, e.g. long term chemistry simulations as well as detailed cloud and precipitation chemistry calculations. The presence of clouds can substantially change the ch...

1 Key Laboratory of Atmospheric Chemistry (LAC), Centre for Atmosphere Watch and Services (CAWAS), Chinese Academy of Meteorological Sciences (CAMS), CMA, Beijing, 100081, China 2 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China 3 Japan Meteorological A...

Atmospheric trace gases have an important impact on Earth’s radiative budget, the oxidative or cleansing ability of the atmosphere, the formation, growth and properties of aerosols, air quality, and human health. During recent years, the coupling between atmospheric chemistry and climate has received particular attention. Therefore, research is now focused on the composition and processes in th...

1SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China 2University of Chinese Academy of Sciences, Beijing, China 3Key Laboratory for Atmospheric Chemistry, Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, CMA, Beijing, China 4Shaanxi Radio and TV University, Xi’an, China 5LASG, Institute of Atmospheric Physics, Chinese Academy of Sci...