1 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
2 Key Laboratory of Geographic Process Analysis & Simulation Hubei Province, Central China Normal University, Wuhan 430079, China.
3 Key Laboratory of Geographic Process Analysis & Simulation Hubei Province, Central China Normal University, Wuhan 430079, China. Electronic address: zhuyy990@ccnu.edu.cn.