Atmospheric Chemistry and Physics www.atmos-chem-phys.net 1680-7316 1680-7324 8 13 2008 10.5194/acp-8-3427-2008 http://www.atmos-chem-phys.net/8/3427/2008/ http://www.atmos-chem-phys.net/8/3427/2008/acp-8-3427-2008.html http://www.atmos-chem-phys.net/8/3427/2008/acp-8-3427-2008.pdf 3427 3439 2008-07-02 Modelling the optical properties of fresh biomass burning aerosol produced in a smoke chamber: results from the EFEU campaign K. Hungershoefer hungershoefer@lisa.univ-paris12.fr K. Zeromskiene Y. Iinuma G. Helas J. Trentmann T. Trautmann R. S. Parmar A. Wiedensohler M. O. Andreae O. Schmid Institute for Meteorology, University of Leipzig, Leipzig, Germany Leibniz-Institute for Tropospheric Research, Leipzig, Germany Max Planck Institute for Chemistry, Biogeochemistry Dept., Mainz, Germany Centre for Atmospheric Chemistry, York University, Toronto, Canada Institute for Atmospheric Physics, Johannes Gutenberg University Mainz, Mainz, Germany Remote Sensing Technology Institute, German Aerospace Centre, Wessling, Germany Institute for Inhalation Biology, GSF-National Research Centre for Environment and Health, Neuherberg, Germany IIMT Engineering College, Department of Applied Science, Ganga Nagar, Meerut, India now at: Laboratoire Inter-Universitaire des Systèmes Atmosphériques (LISA), Université Paris 7/12 and CNRS (UMR 7583), Créteil, France A better characterisation of the optical properties of biomass burning aerosol as a function of the burning conditions is required in order to quantify their effects on climate and atmospheric chemistry. Controlled laboratory combustion experiments with different fuel types were carried out at the combustion facility of the Max Planck Institute for Chemistry (Mainz, Germany) as part of the "Impact of Vegetation Fires on the Composition and Circulation of the Atmosphere" (EFEU) project. The combustion conditions were monitored with concomitant CO2 and CO measurements. The mass scattering efficiencies of 8.9±0.2 m2 g−1 and 9.3±0.3 m2 g−1 obtained for aerosol particles from the combustion of savanna grass and an African hardwood (musasa), respectively, are larger than typically reported mainly due to differences in particle size distribution. The photoacoustically measured mass absorption efficiencies of 0.51±0.02 m2 g−1 and 0.50±0.02 m2 g−1 were at the lower end of the literature values. 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