1. School of Environmental Science and Engineering, Shandong Key Laboratory of Environmental Processes and Health, Shandong University, Qingdao 266237, China
2. Department of Chemistry, College of Environmental Science and Forestry, State University of New York, Syracuse, New York 13210, United States
3. Division of Environment and Sustainability, Hong Kong University of Science and Technology, Kowloon, Hong Kong 999077, China
4. Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
5. Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), D-04318 Leipzig, Germany