1. Sino-France Institute of Earth Systems Science, Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, PR China
2. Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100871, PR China
3. Institute for Meteorology and Climate Research (IMK-IFU), Karlsruhe Institute of Technology, Garmisch-Partenkirchen 82467, Germany
4. Forest Ecosystems and Society, Oregon State University, Corvallis, Oregon 97331, United States
5. Agricultural Clean Watershed Research Group, Chinese Academy of Agricultural Sciences, Institute of Environment and Sustainable Development in Agriculture, Beijing 100081, PR China
6. Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 3UU, U.K.