1. a Cold and Arid Regions Environmental and Engineering Research Institute (CAREERI) , Chinese Academy of Sciences , Lanzhou, 730000, China
2. b The Scientific Information Center for Resources and Environment , Chinese Academy of Sciences , Lanzhou, 730000, China
3. c Flemish Institute for Technological Research (VITO) , Boeretang 200, B‐2400 Mol, Belgium
4. d Institute of Remote Sensing Application , Chinese Academy of Sciences , Beijing, 100101, China