1. College of Geography and Remote Sensing Science, Xinjiang University, Urumqi, China
2. State Key Laboratory of Vegetation and Environmental Change, Institute of BotanyChinese Academy of Sciences, Beijing, China
3. University of Chinese Academy of Sciences, Beijing 100049, China
4. Institute of Ecology, College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing 100871, China
5. Department of Geography, Faculty of Arts and Social Sciences, National University of Singapore, Singapore 117570, China
6. IInstitute of Remote Sensing and Geographic Information System, School of Earth and Space Sciences, Peking University, Beijing 100871, China
7. Institute of Ecology, College of Urban and Environmental Science, Peking University, Beijing 100871, China