Mingzhu Xu¹, Ronggao Liu², Yang Liu², Jing Ming Chen^1,3, Aleksandra Wolanin⁴ and Weimin Ju¹, (1)Nanjing University, Nanjing, China, (2)IGSNRR Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing, China, (3)University of Toronto, Department of Geography and Planning, Toronto, ON, Canada, (4)Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany