摘要
文章为了探究通辽地区大雪天气的气象要素演变特征和影响因素以及形成原因,利用常规气象资料、自动气象站等数据,对2015年2月20—22日大雪天气过程进行分析,结果表明:有利的大尺度环流、有利的层结条件、充沛的水汽条件、冷暖低空急流的汇合、高低空急流的耦合、强烈的上升运动及高空急流的动量下传作用是激发此类灾害性天气的关键因素。这些指标能够为今后的大雪预报提供参考依据,对大雪预报准确率的提高起至关重要的作用。
In order to study the change characteristics of meteorological factors and its influencing factors, as well as the forming reasons of snow weather in Tongliao, the article analyzed the heavy snow process on February 20-22, 2015 by using convention weather data and auto weather station data. The results showed that the advantageous large scale circulation, the advantageous stratifi- eation condition, abundant moisture condition, convergence of cold and warm low level jet stream, high-low level jel stream coupling, strong ascending motion, momentum download effect of high level jet stream were. the key factor of forming the disaster weather. These indicators could provide reference for the future snow forecast, and it is very important to improve the accuracy of snow forecast.
出处
《内蒙古气象》
2015年第5期3-6,共4页
Meteorology Journal of Inner Mongolia
关键词
阻塞高压
低空急流
蒙古气旋
高空急流
动量下传
blocking high pressure
low level jet
Mongolia cyclone
upper jet stream
momentum download
