1. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research; Chinese Academy of Sciences; Beijing China
2. University of Chinese Academy of Sciences, No. 19A Yuquan Road; Beijing 100049 China
3. Department of Microbiology and Plant Biology; University of Oklahoma; Norman Oklahoma
4. Department of Land Resources and Environmental Sciences; Montana State University; Bozeman Montana
5. Climate and Ecosystem Sciences Division; Lawrence Berkeley National Laboratory; Berkeley California
6. Goddard Space Flight Center, NASA; Greenbelt Maryland
7. College of Urban and Environmental Sciences; Peking University; Beijing 100871 China
8. Tiantong National Forest Ecosystem Observation and Research Station, School of Ecological and Environmental Sciences; East China Normal University; Shanghai China
9. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment; Chinese Academy of Sciences; Xi'an 710061 China