1 Institute of Ecology, College of Urban and Environmental Sciences, Key Laboratory for Earth Surface Processes of Ministry of Education, Peking University, Beijing, China.
2 State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China.
3 University of Chinese Academy of Sciences, Beijing, China.
4 School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, China.
5 Institute of Ecology, College of Urban and Environmental Sciences, Key Laboratory for Earth Surface Processes of Ministry of Education, Peking University, Beijing, China. wangyinpku@pku.edu.cn.