东北地区一次暴雪过程的诊断分析

利用观测资料对东北地区的一次暴雪过程作了物理量场的诊断分析。分析结果表明：1本次暴雪是受到贝加尔湖强冷空气和江淮暖湿气流的共同影响而形成的；2．稳定的地面形势和空中冷性长波槽的过境为本次暴雪过程提供了强大的动力条件；3．北上江淮暖湿气流携带来自东海和渤海两个源地的充沛水汽到达东北地区，为东北暴雪的产生提供了水汽条件；4．高低空垂直切变明显、高层辐散与低层辐合相配置导致的强上升运动以及中低层深厚的正涡度产生和维持是东北暴雪形成的动力机制。

The Diagnostic Analysis on a Heavy Snow in the Northeast Region of China

Using observation data,analyzed the physical field of a heavy snow in the northeast region.The results showed:1.This heavy snow was formed because of the common influence of the Baikal strong cold air as well as the warming and wetting flow of Changjiang and Huaihe River Basin.2.The stable ground situation and the passing of cold long-wave troughs in air have provided the strong dynamic condition for the process of the heavy snow.3.The warming and wetting flow in Changjiang and Huaihe River Basin which have...