1. State Key Laboratory of Loess and Quaternary Geology, Xi’an AMS Center, Institute of Earth Environment, Chinese Academy of Sciences, Shaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi’an 710061, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Department of Environmental and Resource Engineering, Technical University of Denmark, DTU Risø Campus, Roskilde 4000, Denmark
4. Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, China
5. Xi’an Institute for Innovative Earth Environment Research, Xi’an 710061, China