1 School of Geospatial Engineering and Science, Sun Yat-sen University & Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China; College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China; University Corporation for Polar Research, Beijing 100875, China.
2 Department of Geography, Texas A&M University, College Station, TX 77843, USA.
3 Greenland Institute of Natural Resources, Nuuk, Greenland 5703900, Denmark.
4 College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China.
5 School of Geospatial Engineering and Science, Sun Yat-sen University & Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China; College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China; University Corporation for Polar Research, Beijing 100875, China. Electronic address: chengxiao9@mail.sysu.edu.cn.