1. Institute of Surface-Earth System Sciences, School of Earth System Science, Tianjin University, Tianjin 300072, China
2. Department of Earth and Environmental Sciences, Ludwig-Maximilians-Universität München, Munich 80333, Germany
3. Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå 90736, Sweden
4. Department of Geography, The University of Hong Kong, Hong Kong 999077, China
5. Department of Civil & Environmental Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States