1. Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
2. CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China
3. University of Chinese Academy of Sciences, Beijing 100049, China
4. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
5. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China