1. Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University, Shanghai 200241, China
2. School of Geographic Sciences, East China Normal University, Shanghai 200241, China
3. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China
4. School of Atmospheric Sciences, Nanjing University, Nanjing, Jiangsu 210023, China
5. Ministry of Education Laboratory of Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
6. Department of Politics and International Studies, University of Cambridge, Cambridge CB3 9DT, U.K.
7. School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
8. School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China