辽宁省冬季一次连续性降雪中倒暖回流的作用

Role of Back Warm Flow in the Continuous Snowfall of Liaoning Province

针对辽宁省冬季一次连续性降雪过程,从天气实况、高低空天气形势和各个物理量场分析降雪机制和持续成因。通过分析表明,低空偏东风倒暖回流将暖湿空气输送到高空冷空气的下方,在地面低压后部形成降雪是形成该次连续性降雪的重要条件。

In view of the continuous snowfall in winter of Liaoning Province,the snowfall mechanism and causes for continuity were analyzed on the basis of weather regime, high-altitude and low-altitude weather situation, different physical quantity fields. The analysis showed that the low-altitude east warm wind conveyed warm and humid air to the bottom of high-altitude cold air, and formed snowfall in the rear part of low ground pressure, which was the essential condition for this continuous snowfall.