1 Alpine Paleoecology and Human Adaptation Group, State Key Laboratory of Tibetan Plateau Earth System, and Resources and Environment, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: xcao@itpcas.ac.cn.
2 Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
3 College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China.
4 School of Geographic Sciences, Hebei Normal University, Shijiazhuang 050024, China.
5 Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Research Unit Potsdam, Potsdam 14473, Germany; Institute of Environmental Science and Geography, University of Potsdam, Potsdam 14476, Germany; Institute of Biochemistry and Biology, University of Potsdam, Potsdam 14476, Germany.
6 Department of Biological Sciences & Bjerknes Centre for Climate Research, University of Bergen, Bergen N-5020, Norway.
7 Guangdong Key Lab of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Zhuhai 519082, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China.
8 Yunnan Key Laboratory of Plateau Geographical Processes and Environmental Changes, Faculty of Geography, Yunnan Normal University, Kunming 650050, China.
9 Alpine Paleoecology and Human Adaptation Group, State Key Laboratory of Tibetan Plateau Earth System, and Resources and Environment, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China.