Biogeosciences www.biogeosciences.net 1726-4170 1726-4189 6 8 2009 10.5194/bg-6-1655-2009 http://www.biogeosciences.net/6/1655/2009/ http://www.biogeosciences.net/6/1655/2009/bg-6-1655-2009.html http://www.biogeosciences.net/6/1655/2009/bg-6-1655-2009.pdf 1655 1670 2009-08-14 Concentrations and fluxes of biogenic volatile organic compounds above a Mediterranean macchia ecosystem in western Italy B. Davison b.davison@lancaster.ac.uk R. Taipale B. Langford P. Misztal S. Fares G. Matteucci F. Loreto J. N. Cape J. Rinne C. N. Hewitt Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK University of Helsinki, Department of Physics, P.O. Box 64, 00014 University of Helsinki, Finland Centre for Ecology & Hydrology, Bush Estate, Penicuik, Midlothian EH26 0QB, UK School of Chemistry, University of Edinburgh, Edinburgh EH9 3JJ, UK National Research Council, Institute of Agro-environmental and Forest Biology, Via Salaria km. 29300, 00016 Monterotondo Scalo, Rome, Italy now at: University of California, Department of Environmental Science, Policy, and Management, 137 Mulford Hall, Berkeley, CA 94720, USA Emission rates and concentrations of biogenic volatile organic compounds (BVOCs) were measured at a Mediterranean coastal site at Castelporziano, approximately 25 km south-west of Rome, between 7 May and 3 June 2007, as part of the ACCENT-VOCBAS field campaign on biosphere–atmosphere interactions. Concentrations and emission rates were measured using the disjunct eddy covariance (DEC) method utilizing three different proton transfer reaction mass spectrometers (PTR-MS) so allowing a comparison between the instruments. 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