Atmospheric Chemistry and Physics Discussions www.atmos-chem-phys-discuss.net 1680-7367 1680-7375 8 2 2008 10.5194/acpd-8-7703-2008 http://www.atmos-chem-phys-discuss.net/8/7703/2008/ http://www.atmos-chem-phys-discuss.net/8/7703/2008/acpd-8-7703-2008.html http://www.atmos-chem-phys-discuss.net/8/7703/2008/acpd-8-7703-2008.pdf 7703 7724 2008-04-18 Elemental content of PM_2.5 aerosol particles collected in Göteborg during the Göte-2005 campaign in February 2005 J. Boman M. J. Gatari S. Janhäll A. S. Shannigrahi A. Wagner Department of Chemistry, Atmospheric science, Göteborg University, 412 96 Göteborg, Sweden Institute of Nuclear Science and Technology, University of Nairobi, P.O. Box 30179-00100, Nairobi, Kenya now at: Max Planck Institute for Chemistry, Dept. Biogeochemistry, J.-J.-Becherweg 27, 55128 Mainz, Germany Göte–2005 was a measurement campaign in the city of Göteborg with the aim of studying the influence of the winter thermal inversions on urban air pollution. Elemental speciation of PM_2.5 aerosol particles, collected on Teflon filters at three urban sites and one rural site in the Göteborg region, was a major part of the study. Trace element analysis was done by Energy Dispersive X-Ray Fluorescence (EDXRF) spectrometry and the concentrations of S, Cl, K, Ca, Ti, V, Mn, Fe, Ni, Cu, Zn, Br and Pb were determined. The elemental content of the particles in combination with information of local wind speed and direction and also backward trajectories were used to estimate the source areas of the pollutants. We can conclude that S, V, Ni, Br, and Pb have their main sources outside the Göteborg area, since we cannot see elevated concentrations of these elements during an inversion episode. Sea traffic and harbour activities were also identified, primarily by the S and V content of the particles. This study proves that the elemental analysis by EDXRF presents valuable information for tracing the origin of air masses arriving at a measurement site. 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