1 State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China.
2 Utah Climate Center, Utah State University, Logan, UT 84322.
3 Department of Plants, Soils, and Climate, Utah State University, Logan, UT 84322.
4 School of Geomatics, Anhui University of Science and Technology, Huainan 232001, China.