Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Science, 320 Donggang West Road, lanzhou, Gan 730000, China
National Snow and Ice Data Center, Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, 1540 30th St., Boulder, CO 80303, United States
Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Science, 320 Donggang West Road, lanzhou, Gan 730000, China
Meteorology Bureau of Gansu Province, 2070 Donggang West Road, Lanzhou, Gan 730020, China