Utilizing experimental data of the atmospheric surface layer in the Gobi Oasis of Jinta in a comparative study, we demonstrate that under the condition of unstable stratification, the normalization variances of temperature in the oasis and Gobi Desert meet 1/3(z/Λ)(z/Λ)while normalization variances of both humidity and CO2 in the oasis meet(z)sz\Λ-1/3;s s z Λ the normalization variance of temperature in the oasis is large due to disturbance by advection, whereas variance of CO2 in the Gobi Desert has certain degree of deviation relative to Monin-Obukhov(M-O) scaling, and humidity variance completely deviates from variance M-O scaling. The above result indicates that under the condition of advection, humidity variance meets the relationsm sA sB D and it is determined by relative magnitude of scalar variance of advection transport. Our study reveals that, if the scalar variance of humidity or CO2 transported by advection is much larger than local scalar variance, observation value of scalar variance will deviate from M-O scaling; when scalar variance of advection transport is close to or less than local scalar variance, the observation value of scalar variance approximately meets M-O scaling.
This paper presents research on the surface drag coefficients,CD,and the bulk transfer coefficients of sensible heat flux,CH,in the permafrost region at the Tanggula Pass of the Tibetan Plateau.The data were obtained from the Open-Path Eddy Covariance Sys-tem and the 10-m Automatic Weather Station(AWS)at the TGLMS site which supported by Cryosphere Research Station(Chi-nese Academy of Science)on the Qinghai-Xizang Plateau(Tibetan Plateau).The characteristics of CD and CH in relation to at-mospheric instability and wind velocity are discussed,and it was found that the bulk transfer coefficients varied with air conditions and were different in different months.However,the bulk transfer coefficients obtained from the eddy covariance system did not show a significant increasing trend with increasing atmospheric instability,and the bulk transfer coefficients did not change greatly with increasing wind velocity at 10 m.
