海东市两次寒潮天气对比分析

Comparative Analysis of Two Cold Wave Processes in Haidong

利用常规观测数据,引入天气学分析方法,对海东地区两次寒潮天气过程中高低空系统强度、冷空气源地、路径以及降温幅度等方面进行了对比分析,结果表明:两次寒潮天气过程均为“横槽型”;影响海东地区的冷空气分为东路和西路,冷空气影响海东地区之前,两条河谷风向将转变为一致的偏东风,且风速加大,有利于冷空气的“倒灌”;寒潮前期的地面回暖信号特征以及升温幅度的大小在实际业务当中可作为预报预警着眼点。

Using the conventional observation data, the synoptic analysis method is introduced to compare and analyze the intensity of the high and low altitude system, the source, path and cooling range in the two cold wave weather processes in Haidong region. The results show that the two cold wave weather processes are “transverse trough type”. The cold air affecting Haidong area is divided into east road and west road. Before the cold air affects Haidong area, the wind direction of the two valleys will change into the easterly direction, and the wind speed will increase, which is conducive to the “reverse flow” of cold air. The characteristics of ground warming signal and the magnitude of temperature rising in the early stage of cold wave can be used as the focus of forecasting and warning in practical operations.