1. State Key Laboratory of Loess and Quaternary Geology (SKLLQG), and Key Laboratory of Aerosol Chemistry and Physics; Institute of Earth Environment, Chinese Academy of Sciences; Xi'an P. R. China
2. Center for Ecological and Environmental Sciences; Northwestern Polytechnical University; Xi'an P. R. China
3. University of Chinese Academy of Sciences; Beijing P. R. China
4. Tiantong National Field Observation Station for Forest Ecosystem, School of Ecological and Environmental Sciences; East China Normal University; Shanghai P. R. China
5. Center for Global Change and Ecological Forecasting; East China Normal University; Shanghai P. R. China
6. Department of Environmental Science, Policy, and Management; University of California at Berkeley; Berkeley CA USA
7. Institute of Global Environmental Change; Xi'an Jiaotong University; Xi'an P. R. China
8. Milken Institute of Public Health; The George Washington University; WA USA
9. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau; Northwest A&F University; Yangling P. R. China
10. Haibei Grassland Ecological Monitoring Station; China Meteorological Administration; Haibei China
11. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute; Chinese Academy of Sciences; Lanzhou P. R. China
12. Department of Environmental Sciences; Shaanxi Normal University; Xi'an P. R. China
13. Hainan Tropical Ocean University; Sanya P. R. China