1. Atmospheric Chemistry Department; Max Planck Institute for Chemistry; Mainz Germany
2. Department of Civil and Environmental Engineering; Massachusetts Institute of Technology; Cambridge Massachusetts USA
3. Laboratory of Atmospheric Chemistry; Paul Scherrer Institute; PSI Villigen Switzerland
4. Now at Directorate for Energy, Transport and Climate, Air and Climate Unit, Joint Research Centre (JRC); European Commission; Ispra Italy
5. Mines Douai; SAGE; Douai France
6. LISA, UMR CNRS 7583, Université Paris Est Créteil et Université Paris Diderot, Institut Pierre Simon Laplace; Créteil France
7. Now at Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), CNRS (UPR 3021)/OSUC; Orléans France