1. Earth System Science Programme, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, P. R. China
2. Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), Leipzig 04318, Germany
3. Department of Civil and Environmental Engineering, Department of Ocean Science and Technology, and Centre for Regional Oceans, Faculty of Science and Technology, University of Macau, Taipa 999078, Macau SAR, P. R. China
4. School of Environmental Science and Engineering, Shandong University, Qingdao 266237, P. R. China
5. The Institute of Environment, Energy, and Sustainability, The Chinese University of Hong Kong, Hong Kong, P. R. China