1. State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, People’s Republic of China
2. International Institute for Earth System Science, Nanjing University, Nanjing, People’s Republic of China
3. School of Foreign Languages, Zhongnan University of Economics and Law, Wuhan, People’s Republic of China
4. College of Information and Technology, Jilin Agricultural University, Changchun, People’s Republic of China
5. National Earth System Science Data Center, Beijing, People’s Republic of China