1. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China;
2. Institute for Atmospheric and Earth System Research/Physics Faculty of Science, University of Helsinki, Helsinki, Finland;
3. LISA, UMR CNRS 7583, University Paris-Diderot, University Paris Est-Creteil, IPSL, Paris, France;
4. School of Atmospheric Sciences, Nanjing University, Nanjing, China;
5. Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China