高空具有高湿位势涡度值的干冷空气叠加在低层扰动上，有利于不稳定层结的加强和降水发生。
The upper level dry and cold air with high moist potential vorticity value was superposed to the low-level disturbance, which was advantageous to instability stratification strength and precipitation.
通过中性和不稳定层结条件下不同叶面积指数算例的模拟分析及与已有观测结果的比较表明，本文所建大涡模式对森林冠层和森林边界层有较好的模拟效果。
The analysis of simulation results and the comparison with observational data show that the LES model simulates the turbulent flow in forest canopy and forest boundary layer very well.
利用不同密度分层的盐水模拟稳定层结大气条件，在水槽中成功地模拟了两层大气分层流中二维山脊引起的地形波，得到的波动图像与线性理论模式结果在定性上基本一致。
The mountain wave induced by a ridge in two-layer stratifiedfliud has been successfully simulated in a tank . The wave pattern is almost the same compared with the linear theory result qualitatively.
本文应用WKB方法研究了在弱非均匀层结大气中，当基本气流具有弱垂直切变时，重力惯性内波的稳定性问题。
This paper discusses the stability of internal inertial gravity wave in the heterogeneous stratified atmosphere when basic flow appears to be weak vertical shear by the WKB method.
并且分析了背景场层结稳定度与冷岛的关系。
And the relationship of the oasis cold island and the stratification stability of the background field has been analyzed.
层结越不稳定，绝对和相对角速度越小，越有利于螺旋结构的形成。
The more instable the stratification of the atmosphere and the smaller the absolute and relative angular velocities, the more likely it forms the spiral wave.
当层结稳定度减小时，最大增长率随相对最大增长率得增大而减小。
Finally when stratified stability decreases, the relative maximal growth rate increases, while the maximal growth rate decreases instead.
采用计算横波型扰动波谱和谱函数的方法，研究了当基本气流具有垂直线性切变、层结参数为常值时横波型扰动的不稳定，给出了不稳定扰动的结构，讨论了不稳定的性质。
The character and structure of instability of transversal wave disturbance is studied in this paper by using calculating the spectrum and spectral function of the transversal wave disturbance.
采用计算横波型扰动波谱和谱函数的方法，研究了当基本气流具有垂直线性切变、层结参数为常值时横波型扰动的不稳定，给出了不稳定扰动的结构，讨论了不稳定的性质。
The character and structure of instability of transversal wave disturbance is studied in this paper by using calculating the spectrum and spectral function of the transversal wave disturbance.
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