1. Institute of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, 52428Jülich, Germany
2. International Joint Laboratory for Regional Pollution Control, 52428Jülich, Germany
3. International Joint Laboratory for Regional Pollution Control, 100871Beijing, China
4. State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, 100871Beijing, China
5. Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, 518055Shenzhen, China