Chinese Academy of Sciences (CAS) - Northwest Institute of Eco-Environment and Resources, University of Wollongong, Gansu Agricultural University, University of Wollongong, Lanzhou University, Chinese Academy of Sciences (CAS) - Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences (CAS) - Northwest Institute of Eco-Environment and Resources, University of California, Los Angeles (UCLA) - Department of Geography, University of California, Los Angeles (UCLA) - Department of Geography, The University of Hong Kong, Chinese Academy of Sciences (CAS) - Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences (CAS) - State Key Laboratory of Loess and Quaternary Geology and Chinese Academy of Sciences (CAS) - Institute of Tibetan Plateau Research