1. Gansu Meteorological Bureau, 2070 Donggang East Road, Lanzhou, 730020, China
2. MOE Key Laboratory of West China’s Environmental Systems, College of Earth and Environmental Sciences, Lanzhou University, 222 Tianshui South Road, Lanzhou, 730000, China
3. State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, 320 Donggang West Road, Lanzhou 730000, China
4. Institute of Arid Meteorology, China Meteorological Administration, 2070 Donggang East Road, Lanzhou, 730020, China