1. College of Earth and Environmental Sciences, Lanzhou University , Lanzhou 730000 , China
2. College of Atmospheric Sciences, Lanzhou University , Lanzhou 730000 , China
3. Lanzhou Institute of Arid Meteorology, China Meteorological Administration , No. 2070 Donggang East Road, Lanzhou 730000, Gansu Province , China
4. School of Geography, Nanjing Normal University , Nanjing 210023 , China
5. State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences , Lanzhou 730000 , China
6. School of History and Culture, Lanzhou University , No. 222, Tianshui South Road, Chengguan, Lanzhou 730000, Gansu Province , China