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频散效应对近地面层风速廓线的影响
引用本文:彭卫红,刘式适.频散效应对近地面层风速廓线的影响[J].热带气象学报,1997,13(1):57-67.
作者姓名:彭卫红  刘式适
作者单位:北京大学地球物理系
摘    要:应用含湍流频散效应的近地面层的运动方程求解了不同层结下的风速廓线,着重分析了湍流频散效应对近地面层平稳运动的影响。分析指出:湍流的频散效应对经典的幂律廓线一对数修正,该修正在不稳定层结时比稳定层时明显;利用相似理论也得到了该常数。

关 键 词:频散效应  湍流  风速廓线
收稿时间:6/7/1995 12:00:00 AM
修稿时间:4/5/1996 12:00:00 AM

EFFECT OF TURBULENT DISPERSION ON VERTICAL PROFILE OF WIND SPEED IN SURFACE LAYER
Peng Weihong and Liu Shikuo.EFFECT OF TURBULENT DISPERSION ON VERTICAL PROFILE OF WIND SPEED IN SURFACE LAYER[J].Journal of Tropical Meteorology,1997,13(1):57-67.
Authors:Peng Weihong and Liu Shikuo
Institution:Geophysic Department, Peking University Beijing, 100871;Geophysic Department, Peking University Beijing, 100871
Abstract:New Reynolds mean momentum equations including both turbulent viscosity and dispersion are used to analyze the vertical profile of wind speed in surface layer.It is pointed out that the wind profile of surface layer including turbulent dispersion is a power + logarithmic law,and under the neutral stratification, it is transformed into logarithmic,but the von Karman's constant k is replaced by k1=(1+k/4)-1k;under unstable stratification the effect of dispersion is stronger than under stable.In the light of the similarity theory the same constant is obtained.
Keywords:Dispersion  Turbulent  Profile
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