内蒙古通辽市一次强暴风雪灾害天气成因分析

为了研究内蒙古通辽地区暴风雪天气的气象要素演变特征、影响因素及暴风雪天气的形成原因,利用常规气象资料、卫星云图及数值预报产品等资料对2007年3月3日—3月4日通辽市出现的一次暴风雪灾害天气过程进行分析。分析结果表明:有利的大尺度环流、充沛的水汽条件、高低空急流的耦合、冷暖低空急流的汇合、强的上升运动及动量下传作用是激发该类灾害天气的关键因素。旨在通过对该次大型降雪过程的分析,得出一些经验和指标,并应用于今后的预报工作当中,从而为今后的暴风雪预报提供参考依据。

Cause Analysis of a Violent Snowstorm Disaster Weather in Tongliao City of Inner Mongolia

In order to study the evolution characteristics and influence factors of meteorological elements and the forming causes of snowstorms, a snowstorm disaster weather process that occurred during March 3rd-4th, 2007 was analyzed by using conventional meteorological data, satellite cloud image and numerical forecast products, etc. The results showed that the key factors that inspired such disaster weather were favorable large-scale circulation, abundant water vapor conditions, coupling of upper-lower jets, confluence of cold and warm low-level jets, strong upward movement and momentum downwash role. Some experiences and indices were summarized by analyzing the big snowfall process and it was applied in the forecast in the future, so as to provide reference basis for the forecast of rainstorm in the future.