干旱区生态环境知识资源中心

In this paper the mean wind speed profiles in the atmospheric surface layer over oasis, sand, and Gobi desert surfaces in the HEIhe river Field Experiment (HEIFE) area are discussed for various stability conditions. The mathematical representation of mean wind speed profiles obtained from different sources are used to estimate the mean wind speeds, and the results are compared with observed wind speed data obtained at 20 m meteorological towers over different ground surfaces.

It is found that for unstable and neutral conditions, a composite exponential profile and flux-profile relationship can be used to describe the wind speed profile in the atmospheric surface layer over homogeneous surfaces, the composite exponential profile giving a relatively high accuracy in the estimation of wind speed profiles. For stable conditions, the composite exponential profile also can be used to estimate the wind speed profile, but for very stable conditions, the accuracy is not good. For those conditions, flux-profile equations can give estimates of the wind speed profile with relatively high accuracy.