1 School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China; Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China. Electronic address: jinly@lzu.edu.cn.
2 Potsdam Institute for Climate Impact Research, Potsdam 14412, Germany.
3 School of Geography and Ocean Science, Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, China.
4 Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China; Alpine Paleoecology and Human Adaption Group, Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China.
5 School of Geography and Ocean Science, Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, China. Electronic address: zhangxj@nju.edu.cn.