ACP Atmospheric Chemistry and Physics ACP 1680-7324 Copernicus GmbH Göttingen, Germany 10.5194/acp-10-6793-2010 The Finokalia Aerosol Measurement Experiment – 2008 (FAME-08): an overview Pikridas M. 1 2 Bougiatioti A. 3 Hildebrandt L. 4 Engelhart G. J. 4 Kostenidou E. 1 2 Mohr C. 5 Prévôt A. S. H. 5 Kouvarakis G. 3 Zarmpas P. 3 Burkhart J. F. 6 Lee B.-H. 4 Psichoudaki M. 1 2 Mihalopoulos N. 3 Pilinis C. 7 Stohl A. 6 Baltensperger U. 5 Kulmala M. 8 Pandis S. N. 1 2 4 Department of Chemical Engineering, University of Patras, Greece Institute of Chemical Engineering and High Temperatures (ICE-HT), FORTH, Patras, Greece Department of Chemistry, University of Crete, Greece Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, USA Paul Scherrer Institut, Laboratory of Atmospheric Chemistry, Villigen, Switzerland Norwegian Institute for Air Research, Kjeller, Norway Department of Environment, University of the Aegean, Mytilene, Greece Department of Physics, University of Helsinki, Helsinki, Finland 23 07 2010 10 14 6793 6806 This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://www.atmos-chem-phys.net/10/6793/2010/acp-10-6793-2010.html The full text article is available as a PDF file from http://www.atmos-chem-phys.net/10/6793/2010/acp-10-6793-2010.pdf

A month (4 May to 8 June 2008) of ambient aerosol, air ion and gas phase sampling (Finokalia Aerosol Measurement Experiment 2008, FAME-08) was conducted at Finokalia, on the island of Crete, Greece. The purpose of the study was to characterize the physical and chemical properties of aged aerosol and to investigate new particle formation. Measurements included aerosol and air ion size distributions, size-resolved chemical composition, organic aerosol thermal volatility, water uptake and particle optical properties (light scattering and absorption). Statistical analysis of the aerosol mass concentration variations revealed the absence of diurnal patterns suggesting the lack of strong local sources. Sulfates accounted for approximately half of the particulate matter less than 1 micrometer in diameter (PM<sub>1</sub>) and organics for 28%. The PM<sub>1</sub> organic aerosol fraction was highly oxidized with 80% water soluble. The supermicrometer particles were dominated by crustal components (50%), sea salt (24%) and nitrates (16%). The organic carbon to elemental carbon (OC/EC) ratio correlated with ozone measurements but with a one-day lag. The average OC/EC ratio for the study period was equal to 5.4. For three days air masses from North Africa resulted in a 6-fold increase of particulate matter less than 10 micrometers in diameter (PM<sub>10</sub>) and a decrease of the OC/EC ratio by a factor of 2. Back trajectory analysis, based on FLEXPART footprint plots, identified five source regions (Athens, Greece, Africa, other continental and marine), each of which influenced the PM<sub>1</sub> aerosol composition and properties. Marine air masses had the lowest PM<sub>1</sub> concentrations and air masses from the Balkans, Turkey and Eastern Europe the highest.

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