青藏高原近地层通量特征的合成分析

A COMPOSITE STUDY OF THE SURFACE FLUXES ON THE TIBETAN PLATEAU

中文关键词:  青藏高原  近地层通量  合成分析  变化

英文关键词:Tibetan Plateau  Surface flux  Composite analysis  Variation

中文摘要:

      利用中日亚洲季风机制合作研究计划,设置在青藏高原东部地区的拉萨、日喀则、那曲和林芝4地1993年7月～1999年3月近7a的自动气象站(AWS)近地层梯度观测资料,确定出分季节的高原地表粗糙度和逐日的地面总体输送系数,以此为基础用总体输送公式对地面动量、感热和潜热通量进行了计算,并用合成方法分析了1993～1999年高原近地层通量夏季、冬季的日变化和月变化特征.

英文摘要:

      On the basis of gradient data of the surface layer obtained from four sets of Automatic Weather Station(AWS)installed in Lhasa,Nagqu,Xigazê and Nyingchi on the Tibet an Plateau from July 1993 to March 1999 according to the project of PRC-Japan Asian monsoon mechanism cooperative research,the seasonal surface roug hness lengths and diurnal bulk transfer coefficients at each station are estimated.Then the surface fluxes of momentum,sensible and latent heat are calculated by using bulk formulas.Moreover,the composite characteristics in diurnal and monthly variation of surface fluxes are emphatically analyzed in this paper.