中文摘要：

利用中国科学院2005年珠穆朗玛峰地区科学考察期间（4月2日至6月7日）收集的大气观测资料，分析了珠峰绒布河谷近地层水平风速、温度、湍流强度、湍流通量日变化及地表能量平衡特征。通过分析得出近地层三维风速方差与稳定度的关系基本满足1／3次方规律；珠峰绒布河谷近地层大气水平风速、温度、动量通量、感热通量和潜热通量均存在明显的日变化；地表获得的能量很大一部分以感热形式散失掉了，潜热所占比重很小。另外，还发现绒布河谷地区地表能量通量各分量并不满足能量平衡方程Rn=H3＋Le＋Go通过对地面加热场的分析发现珠峰地表白天是强热源，晚上转变为弱冷源。

英文摘要：

Mt. Qomolangma is much closer to the free troposphere than other regions on the Tibetan Plateau due to its high elevation. It is also a typical area with a special interaction process between land surface and atmosphere, and the high elevation makes itself become an optimal area to study energy transfer and mass exchange over there. With little influence by human being, Mt. Qomolangma is also an ideal place for atmospheric environment observation of the Northern Hemisphere. The process of energy transfer and mass exchange between land surface and atmosphere on the Tibetan Plateau can be better understood by observing the interaction itself and determining the variation characteristics of turbulent parameters such as turbulent intensity, momentum flux and heat flux, etc. The parameterization scheme of global and local climate model can also be improved at the same time. Based on the turbulent data collected at Mt. Qomolangma Base Camp （28°08′15″N, 86°51′13″E） from May 21 to 27, turbulent intensity and turbulent fluxes are acquired by using the eddy correlation method. Diurnal variation characteristics of wind speed air temperature turbolent fluxes amd energy balance in the surface layer are also analyzed in this paper. Sotnte preliminary results are acquited as follows：（1）Diurnal variation curve of air temperature is a single peak pattern and the general variation trend trend of horizontal wind speed is similar to air temperatuce votiation trend. Under the influence of glacial wind and opposite direction of valley wind .the dominant wind direction at Mt. Qomolangma Base Camp is North-South.（2）The relations between three dimensional wind speed varianees and z/L follow the ＂law of 1/3 oiwer＂,and σμ/μ＊=3.33,σμ/μ＊=1.17 under neutral atmospheric condition.（3）The land surface of Rongbu valley is very dry in May. The momentum flux, sensible heat flux and latent heat flux in the surface layer show obvious diurnal variations. The most energy obtained in the surface layer disperse