1 State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China; University of Chinese Academy of Sciences, Beijing 100049, China.
2 State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China; Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi'an 710061, China; Institute of Global Environment Change, Xi'an Jiaotong University, Xi'an 710049, China; Open Studio for Oceanic-Continental Climate and Environment Changes, Qingdao Pilot National Laboratory for Marine Science and Technology, Qingdao 266061, China. Electronic address: tanlch@ieecas.cn.
3 Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China. Electronic address: xuhai@tju.edu.cn.
4 State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China.
5 State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China; Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi'an 710061, China.