1. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100101 China
2. University of Chinese Academy of Sciences, Beijing, 100049 China
3. Department of Civil and Environmental Engineering, University of California, Irvine, California, 92697USA
4. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco‐Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085 China