1. Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing 210023, China
2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China
3. Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing 210023, China
4. School of Environment, Nanjing University, Nanjing 210023, China
5. School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China
6. Department of Geography, University of Toronto, Toronto, Ontario M5S3G3, Canada
7. School of Geographical Sciences, Fujian Normal University, Fuzhou 350315, China