1 State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
2 College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
3 Chengdu Academy of Environmental Sciences, Chengdu 610072, China.
4 State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
5 College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China. Electronic address: yhzhang@pku.edu.cn.
6 State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China. Electronic address: liuxingang@bnu.edu.cn.
7 Beijing Municipal Environmental Monitoring Center, Beijing 100048, China.