Lin Tang,^* Per Erik Karlsson,^** Yongfeng Gu,^*** Deliang Chen,^**** Peringe Grennfelt<sup>*****


*</sup>Lin Tang has a PhD in the field of Environmental Science. She works with ambient ozone and its precursors in urban and regional air pollution, air pollution modelling and its application. Her address: University of Gothenburg, Department of Earth Sciences, P.O. Box 460, SE-405 30 Göteborg, Sweden. E-mail: lin.tang.gu@gmail.com
^**Per Erik Karlsson is an associate professor in Plant Physiology. His main research interests are variations of air pollutant concentrations and deposition in the landscape and their impacts on forest ecosystems as well as carbon sequestration by forests. His address: Swedish Environmental Research Institute Ltd., P.O. Box 5302, SE-400 14 Göteborg, Sweden. E-mail: pererik.karlsson@ivl.se
^***Yongfeng Gu has a MSc in Atmospheric Environment. His research is focused on trajectory and cluster analysis for ozone episodes in southern Sweden. His address: University of Gothenburg, Department of Earth Sciences, P.O. Box 460, SE-405 30 Göteborg, Sweden. E-mail: guyongf@hotmail.com
^****Deliang Chen is a professor in Physical Meteorology at University of Gothenburg. His research area deals with regional climate change and variability in Sweden and China, statistical and dynamic downscaling, climate dynamics, boundary-layer and local climatology with emphasis on surface processes, air pollution, and geostatistics. He is now the Executive Director of the International Council for Science (ICSU). His address: 5 rue Auguste Vacquerie, F-75116 Paris, France. E-mail: deliang@gvc.gu.se
^*****Peringe Grennfelt is a Scientific Director of IVL (Swedish Environmental Research Institute) and adjunct professor in atmospheric chemistry at University of Gothenburg. His main interest is atmospheric chemistry in relation to regional air pollution and its policy development. His address: Swedish Environmental Research Institute, P.O. Box 5302, SE-40014 Göteborg, Sweden. E-mail: peringe.grennfelt@ivl.se