中文摘要：

利用2005年金塔绿洲的湍流资料分析了金塔绿洲农田下垫面上温度和湿度的非相似性。结果表明,低层风速较小和高层风速介于2~4m·s~（-1）时,温度和湿度标量的相似性较大,且温湿度的相似性随稳定度向近中性条件偏移而减小;R_（Tq）（n）和λ_（（n））分别在频率域10~（-2）

英文摘要：

Monin-Obukhov（M-O） similarity theory is an important theoretical basis of the study of the atmospheric surface layer turbulence.Since the surface is always heterogeneous at different scales and in different degrees,temperature（T） is not similar to humidity（q）.In order to investigate the dissimilarity of temperature and humidity at different scales and to further understand the turbulent transport process above Jinta Oasis farmland,the data for three heights（3.33,8.41,16.60 m） in sunny day from the ＂The Oasis System Energy and Water Cycle Field Experiment＂ over Jinta Oasis farmland was used,which was conducted from 23 May to 18 June in 2005.Firstly,the correlation coefficient of temperature and humidity for every 30-min runs was calculated.Secondly,the frequency distributions of ｜ r_（Tq） ｜ in different wind directions and different wind velocity,and the probability distributions of stability with different correlation coefficients for three heights in daytime were analyzed.Thirdly,the spectrum of the correlation coefficient and relative transfer efficiency with Fourier transform under six kinds of correlation coefficient cases（r_（Tq） 0.6,0.3 r_（Tq） 0.6,0 r_（Tq） 0.3,-0.6,-0.6 rTq -0.3,-0.3r_（Tq）0） and three kinds of stability conditions（unstable ζ-0.05,near-neutral-0.05ζ0.05,stable ζ0.05）were analyzed in the frequency domain.The results show that the scalar similarity is larger with the lower wind speed at the low level and with the wind speed is between 2~-4 m·s~（-1） at the top level.With the stability closing to near-neutral conditions,the scalar similarity is decreasing.R_（Tq）（n）and λ_n is approximately to a constant in the frequency domain 10~（-2）n10~（-1） and 10~（-1）n10~0,respectively.With the ｜r_（Tq）｜ decreasing,the corresponding peak frequency of R_（Tq）（n） is decreasing,and the relative transfer efficiency is also decreasing,i.e.,the transfer efficiency of water vapor is increasing,which are caused by the inhibiti