1. Key Lab. of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research Univ. of Chinese Academy of Science Beijing 100049 China
2. Plant Functional Biology and Climate Change Cluster Univ. of Technology Sydney PO Box 123 Ultimo NSW 2007 Australia
3. College of Applied Meteorology Nanjing Univ. of Information Science and Technology Nanjing 210044 Jiangsu China
4. State Key Lab. 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 712100 Shaanxi China