ACPD 12, 19769–19797, 2012 Implication in the formation and aging of α -pinene SOA I. El Haddad et al. Title Page Abstract Introduction Conclusions References Tables Figures ◭ ◮ ◭ ◮ Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion Discussion Paper | Discussion Paper | Discussion Paper | Discussion Paper | Atmos. Chem. Phys. Discuss., 12, 19769–19797, 2012 www.atmos-chem-phys-discuss.net/12/19769/2012/ doi:10.5194/acpd-12-19769-2012 © Author(s) 2012. CC Attribution 3.0 License. Atmospheric Chemistry and Physics Discussions This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. On the chemical nature of the oxygenated organic aerosol: implication in the formation and aging of α -pinene SOA in a Mediterranean environment, Marseille I. El Haddad 1,* , B. D’Anna 2 , B. Temime-Roussel 1 , M. Nicolas 2 , A. Boreave 2 , O. Favez 2,** , D. Voisin 3 , J. Sciare 4 , C. George 2 , J.-L. Jaffrezo 3 , H. Wortham 1 , and N. Marchand 1 1 Aix-Marseille Univ., Laboratoire Chimie Environnement, 13331, Marseille cedex 03, France 2 Universit ´ e Lyon 1, Lyon, 69626, CNRS, UMR5256, IRCELYON, Institut de Recherches sur la Catalyse et l’Environnement de Lyon, Villeurbanne, 69626, France 3 Universit ´ es Joseph Fourier-Grenoble 1-CNRS, UMR5183, Laboratoire de Glaciologie et G´ eophysique de l’Environnement, Saint Martin d’H ` eres, 38402, France 4 Laboratoire des Sciences du Climat et de l’Environnement, CEA-CNRS-UVSQ-IPSL, Gif sur Yvette, 91191, France * now at: Laboratory of Atmospheric Chemistry, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland ** now at: INERIS, DRC/CARA/CIME, Parc Technologique Alata, BP2, Verneuil-en-Halatte, 60550, France 19769