shear front

The mid-scale shear, strong frontal zone, Mongolia cyclone and surface cold front were main influence systems of forming sand and dust storm.

中尺度切变线、强锋区、蒙古气旋和地面冷锋是引发沙尘暴的主要影响系统；

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.

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。

Sliding surface for nearly arc in the central of dumping site, fracturing at the back of the margin and the central sliding along the clay layer shear out in front foot of dumping site in the above.

滑面为近圆弧形，位于排土场的中部，后缘拉裂，中部沿粘土层滑动，前缘在排土场坡脚上方一定位置剪出。

The results suggested that the shear front be generated in the shallow area, then moved seaward and finally disappeared 2 hours later.

切变锋在浅水区域产生，向深水区移动，经历2小时左右消失，它的产生是由于近岸区域与10m深线以外区域的潮汐相位差所导致。

We must pay attention to the southern warm thermal advection as well as the northern cold thermal advection in the cold front shear type rainstorm process.

在该型暴雨的发生过程中，北部冷平流具有十分重要的作用，但南部暖平流的作用也不可忽视。