1. Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University, Hefei, China
2. Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
3. Laboratoire de Physicochimie de l’Atmosphére, Université du Littoral Côte d’Opale, Dunkerque, France
4. Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado 80523-1374, USA