1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources Yangling PR China
2. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing PR China
3. University of Chinese Academy of Sciences Beijing PR China
4. CAS Center for Excellence in Quaternary Science and Global Change Xi'an PR China