根据1994年6-7月在青藏高原五道梁地区的湍流脉动观测资料,分析了该地区近地层能量平衡、感热和潜热的日变化及湍流强度和湍流谱特征。结果表明:晴天该地区近地层能量基本平衡,各能量分量的日变化与常见情况相同;白天感热通量的输送占主导地位,潜热通量占次要地位,符合半干旱地区的一般特征。湍流强度和湍流谱分析表明:在近中性条件下该地区纵向和横向的湍流强度均明显高于平坦下垫面上的,垂直湍流强度符合一般规律。各风速分量谱在高频段满足理论上的-2/3次幂规律,纵向和横向速度谱的峰值频率均明显高于在典型平坦下垫面上得到的结果,垂直速度谱与其它实验结果相一致。

The paper analyses the turbulent data,which collected from the Wudaoliang area of Qinghai-Xizang Plateau in June July 1994.The results show:in the area,the energy fluxes of surface layer can approximately balance.The diurnal variations of net radiation,sensible heat,latent heat and ground heat flux are normal.The sensible heat flux is dominant,the latent heat flux is second in energy balance.Spectra of wind component analysis show,in near neutral stability,the vertical velocity spectral peak is about f=0.3,it is good when compared with others,but the longitudinal velocity(u spectrum) peak is about f=0.1,the cross velocity(v spectrum) is about f=0.2,which are higher than other results.There are same results in vertical velocity spectrum compared with other results.