1. Ministry of Education Laboratory of Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
2. Department of Marine Sciences, University of Connecticut, 1080 Shennecossett Road, Groton, Connecticut 06340, United States
3. Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
4. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
5. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
6. Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University, Shanghai 200241, China
7. School of Geographic Sciences, East China Normal University, Shanghai 200241, China
8. Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China