1 State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China; College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China; Center for the Pan-Third Pole Environment, Lanzhou University, Lanzhou 730000, China.
2 State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: weicaiwang@itpcas.ac.cn.
3 State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China; School of Science, Tibet University, Lhasa 850011, China.