The Influence of Atmospheric Stratifications on Turbulent Features in the Surface Layer over the Tibetan Plateau

This paper is to describe the distribution features of turbulent parameters, friction velocity u* , characteristics temperatureθ* , and Monin–Obukhov length L, and Richardson number Ri at the various levels with different stratified conditions in the surface layer at Lhasa and Naqu sites during June and July 1986 by using the data from the Tibetan Plateau Meteorological Experiment 1986 (TIPMEX–86). The results show that there are a variety of turbulent motion forms under various conditions of the stratification, and the adjustment of thermal process is faster than that of dynamical process. It has also been found that under stable conditions, the change of u* , orθ* with height respectively is larger than that under unstable conditions. The turbulent parameter values for L0, the former is smaller than the later.