1. National University of Singapore, Department of Geography, Singapore
2. Chinese University of Hong Kong, Institute of Space and Earth Information Science, Shatin, N.T., Hong Kong, China
3. University of California, Davis, Department of Civil and Environmental Engineering, Davis, California 95616, United States
4. Chinese University of Hong Kong, Department of Geography and Resource Management, Shatin, N.T., Hong Kong, China
5. Tsinghua University, Center for Earth System Science, Ministry of Education Key Laboratory for Earth System Modeling, Beijing 100084, China