[1]Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;
[2]College of Atmospheric Science, Chengdu University of Information Technology, Chengdu, Sichuan 610225, China;
Qinghai-Tibetan Plateau; surface roughness length; Monin-Obukhov similarity theory; least square fitting;