TURBULENT MEASUREMENT OVER THE SOUTHEASTERN TIBETAN PLATEAU

Based on the second Tibetan Plateau Meteorological Experiment (TIPEX) turbulent data from Changdu, the turbulent structure and transportation characteristics in the near-surface layer for summer time are analyzed by using the eddy correlation technique. The main results show that the relation between the normalized variance of 3D winds and z/L satisfies the similarity law under both unstable and stable stratification. The relations of normalized variances of temperature and specific humidity to z/L obey the law of 1/3 fractional power only under the unstable condition. In the case of stable stratification, their relations to z/L are disperse. The sensible heat dominates in the dry period, making up 80% of the total heating; while in the wet period the heating is intensified to great degree, in which latent (sensible) heat constitutes 60% (40%). The relations of drag coefficients (C_d and C_h) to z/L are quite close and the fitted C_dn (4.40×10^-3) C_hn (4.70×10^-3) are obtained in a neutral case, which are bigger than those for the middle and western parts of the plateau in the same period.