乌拉特中旗一次强沙尘暴天气成因分析

Analysis on the Weather Cause of Strong Sand-Dust Storm in Wulate Middle Banner

利用常规气象观测资料、亚欧天气分析图,对2010年3月19日的一次由蒙古冷涡强烈发展而引发的强沙尘暴天气过程,从天气学成因、动力机制等方面进行分析。表明,强冷空气的卷入使蒙古冷涡强烈发展,为沙尘暴的发生提供了动力条件;蒙古冷涡的垂直结构提供了动量下传机制,在地面冷锋后部形成大风区,为沙尘暴的形成提供了基本条件。通过对这次蒙古冷涡引发的强沙尘暴天气过程的分析,找出蒙古冷涡引发的沙尘暴天气过程的一些特点和预报着眼点。

Using conventional observation data and asia-europe synoptic analysis chart,the synoptic process of strong sand-dust storm that caused by the intensive development of Mongolia clod vortex was analyzed on synoptic cause,dynamic mechanism and other aspects.The results showed that the intensive development of Mongolia cold vortex that caused by strong cold air intrusion provided dynamic condition for sand-dust storm formation,the vertical structure of Mongolia cold vertex provided download mechanism and formed high wind area behind surface cold front,and it provided basic condition for sand-dust formation.Through the synoptic process analysis of strong sand-dust storm which caused by Mongolia cold vortex,some characteristics and forecast points were found in synoptic process of sand-dust storm.