摘要
本文研究了由于边界层内非线性平流作用所引起的湍流边界层对大气运动中的动能耗散率即变性能量的影响。得到了根据宏观外参数来求边界层中动能耗散的公式。结果表明,非线性平流作用将改变变性能量的大小,其影响也随着系统特征的改变而改变,进一步改进了对变性能量的认识。文中还将非线性平流对变性能量影响的结果与地转动量假定下的相应结果加以比较与分析。
The effects of nonlinear advection in the PBL on the dissipation of the atmo-spheric kinetic energy (DAKE) are studied. The DAKE formula involving large-scaleparameters are thus determined. Results show that the effects of nonlinear advection willchange the magnitude of the DAKE, depending on the characteristic features of thepressure pattern. Hence, our knowledge of the DAKE will be further improved. com-parison is also made of the above results with those obtained under the assumption ofthe geostrophic momentum approximation herein.
出处
《南京气象学院学报》
CSCD
1992年第2期126-133,共8页
Journal of Nanjing Institute of Meteorology
关键词
边界层
变性能量
非线性
平流
PBL
the dissipation of kinetic energy
nonlinearity
perturbation method
