AAAR 32nd Annual Conference
September 30 - October 4, 2013
Oregon Convention Center
Portland, Oregon, USA
Abstract View
Chemical Characterization of Particles Sampled in Revin, France, during the EMEP 2012 Summer Campaign
ARI SETYAN, Vincent Crenn, Véronique Riffault, Jean Luc Jaffrezo, Antoine Waked, Stéphane Sauvage, Jean-Luc Besombes, Thierry Leonardis, Nadine Locoge, Ecole des Mines de Douai
Abstract Number: 675 Working Group: Remote and Regional Atmospheric Aerosols
Abstract Understanding the different processes governing PM concentration remains an important issue for air quality in Europe. In the frame of the EMEP Program (http://www.emep.int) and in cooperation with ACTRIS (http://www.actris.net/), ChArMEx (http://charmex.lsce.ipsl.fr) and PEGASOS (http://pegasos.iceht.forth.gr/) projects, two intensive measurement periods were held in summer 2012 and winter 2013. The main objective is to obtain high resolution and extended measurements of aerosols and its precursors in order to improve the knowledge regarding the temporal and spatial variability of PM speciation and to assess chemical transport models. Five monitoring sites in France were equipped with additional on-line and off-line instruments to measure particle chemical and physical properties, as well as precursor gases.
Preliminary results obtained at a remote site in Revin, France, during the summer campaign (June 8-July 12, 2012) will be shown. The average concentration of non-refractory submicron particles (NR-PM1) was low, and the chemical composition was dominated by organics (56% of total NR-PM1) and sulfate (25%). Three organic factors were identified by positive matrix factorization (PMF), including two oxygenated organic aerosols (OOA) with different O/C ratios (more oxidized OOA: 0.94; less oxidized OOA: 0.41), and one hydrocarbon-like organic aerosol (HOA). Taken together, the two OOA factors accounted for 82% of the total organic mass and correspond to secondary organic aerosols (SOA), while HOA accounted for 18% of organics and corresponds to anthropogenic emissions. The organic-to-elemental carbon ratio (OC/EC) was 8.4 (±2.8) on average (±1σ). Three events (June 28, night of June 28-29, and July 3-5) analyzed with back trajectories showed that the site was mainly under the influence of long-range transport from the Paris megacity (~230 km from the site). New particle formation and growth events have never been observed during this study. These results suggest that particles sampled at Revin were mainly SOA formed during long range transport.