1. Key Laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation (Ministry of Education), Qinghai Normal University, Xining 810008, Qinghai, China
2. Qinghai Province Key Laboratory of Physical Geography and Environmental Process, College of Geographical Science, Qinghai Normal University, Xining 810008, Qinghai, China
3. State Key Laboratory of Remote Sensing Science, Jointly Sponsored By Beijing Normal University and Aerospace Information Research, Institute of Chinese Academy of Sciences, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, Beijing, China
4. Maintenance Company of Qinghai Electric Power Company of State Grid, Xining 810000, Qinghai, China