水平风切变

从Brunt-Vaisala频率N和水平风切变计算的Richardson数Ri剖面也显示出季节差异，Ri<1/4的动力不稳定区出现在夏季，而Ri>0.4的稳定区出现在冬季。

Richardson number Ri calculated from Brunt-Vaisala frequency N and horizontal wind shear S also reveals seasonal difference : dynamically unstable regions of Ri smaller than 1 / 4 are observed in summer , whereas stable regions of Ri larger than 0.4 are observed in winter .

一次低空水平风切变的小尺度特征分析

Analysis of a Small-scale Low Level Horizontal Wind Shear Process over Qingdao Airport

中尺度干涌的涌入促使强对流云团群合并发展，并加剧对流辐合体内水平风切变，最终导致龙卷产生。

East moving of the mesoscale dry surge intensified the horizontal wind shear , at last caused the tornado .

结果表明，这次强对流天气是在有利的大尺度天气形势下产生的，局地环境CAPE指数大，水平风的垂直切变较强。

The result shows that the severe convective storm occurred under the advantageous large scale weather conditions , with local large CAPE index and strong vertical shear of horizontal wind . Severe hail is caused by multicell severe storm .

水平风的垂切变对飞机纵向稳定性的影响

Influence of windshear on longitudinal stability of flight

FNL资料分析表明，在锋区内存在1个较大的水平温度梯度带，水平风切变明显。

According to the FNL ( Final Analysis ) data , the cold front was found to have a typical horizontal and vertical structure with a maximum temperature gradient and obvious wind shear .