1. State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi'an China
2. University of Chinese Academy of Sciences Beijing China
3. CAS Center for Excellence in Quaternary Science and Global Change Xi'an China
4. Guanzhong Plain Ecological Environment Change and Comprehensive Treatment National Observation and Research Station Xi'an China
5. School of Engineering and Applied Sciences Harvard University Cambridge MA USA
6. Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Hefei China
7. Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing China