1 The State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China.
2 University of Chinese Academy of Sciences, Beijing 100049, China.
3 Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720-3114, USA.
4 Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
5 University of Chinese Academy of Sciences, Beijing 100049, China. xinlei.guo@inra.fr niuzheng@radi.ac.cn.
6 The State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China. xinlei.guo@inra.fr niuzheng@radi.ac.cn.