1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2. Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xian 710061, China
3. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
4. Centre for Earth Observation Science, and Department of Environment and Geography, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
5. Center for Advances in Water and Air Quality, Lamar University, Beaumont, Texas 777100, United States
6. University of Chinese Academy of Sciences, Beijing 100045, China