云砧

在冬天，当你用手扫除车上的积雪时，你的手指也许会感受到那种寒冷——风寒的寒冷，这远远比你在夏天时看到的远处隐约的雷雨云砧要危险得多。

That chill you may feel in your fingers as you clear snow off your car this winter is a much more pressing danger than those thunderheads you may see in the distance this summer .

密集的正地闪也与强回波区相对应，而稀疏的正地闪则多发生在系统后部的稳定性降水或云砧部位。

Moreover , the dense positive CG flashes can also be observed in the strong echo region , while sparse ones are in the weak and stable echo region or cloud anvil in the rear MCS .

根据三维重构结果，可以直观的获得气象预报时所需要的一些重要信息，如气流上升和下沉、云砧的状态等。

According to the results of three-dimensional reconstruction , we can obtain some important information needed in weather forecasting directly , such as the rising and sinking of the airflow , the state of the cloud anvil and so on .