在一种寒潮情况下的水平温度场及冷锋构造

本文选择了一次大气物理过程比较简单的寒潮作为例子,讨论其温度场及冷锋的构造。事实看出,寒潮前沿的冷锋,在黄河流域时与在华南时,构造是不同的。本文对于锋的构造的改变进行了初步的讨论。再者,寒潮末期的高空温度场改变很大,作者试用锋生公式计算,结果指出,温度平流值的变化起着主导作用。

AN INVESTIGATION OF THE STRUCTURE OF THE COLD FRONT AND THE UPPER HORIZONTAL TEMPERATURE FIELD IN A CASE OF COLD AIR OUTBREAK

A cold air outbreak with simple synoptical process is selected as an example for this investigation. The field of the upper horizontal temperature and the structure of the cold front are discussed.As the front moves from north to south over China, the slope of the front in the lower level steepens and its intensity increases.In the late stage of the cold air outbreak,the upper horizontal temperature field changes rapidly. Computation by frontogenetic formula shows that the term of differential temperature advection is predominant.