1. Key Laboratory of Remote Sensing of Gansu Province, Heihe Remote Sensing Experimental Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China
2. German Research Centre for Geosciences, Potsdam, Germany
3. College of Geography and Environmental Science, Northwest Normal University, Lanzhou, China
4. National Cryosphere Desert Data Center, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China