一次东风波引起的特大暴雨天气过程分析

作者：夏秋萍  张滨

单位：宁波92919部队气象台 浙江 宁波 315020

关键词：东风波 低涡 暴雨 地形

分类号：研究与分析

出版年·卷·期（页码）：2011·28·第三期（68-73）

摘要：

对2010年7月24-27日浙东南沿海温州、台州、宁波、舟山等地出现的特大暴雨天气过程进行分析,发现出现连续暴雨的成因主要是东风波,西环副高的热力对流云系与东风波的相互作用及东风波诱生的低涡也是暴雨持续出现的重要因素;同时天台山、括苍山的地形强迫抬升作用和沿海喇叭形超浅海河口港湾的狭管效应也起了重要作用。并且指出这次东风波南北振幅大,持续时间较长,伸展高度较高达200hPa左右,为较深厚的东风波,其结构特点是:槽前低层辐散、高层辐合,槽后低层辐合、高层辐散;波前下沉运动、波后上升运动。

This paper analyzed the process of heavy rain which happened on July 24 to 27 2010 at southeastern coast of Zhejiang,Wenzhou,Taizhou,Ningbo,Zhoushan et al.,and discovered that the continuous heavy rain is caused by the easterly waves.The interaction of Western Subtropicaol High heat convection cloud with the east-erly waves and the low vortex induced by wave were also important persistent heavy rain;At the same time,the uplifting effect of the Tiantai Mountain and Kuocang mountain,along with the narrow tube effect at the coastal horn-type Harbour also played an important role.We pointed out that it’s a profound easterly wave with big northe-south amplitude,long duration and high height extending up to 200 hPa.The structural features are:low-level trough before the divergence,high-level convergence,after the trough of low level convergence togeth-er high-level divergence;wave front sinking motion,upward motion after the wave.

参考文献：

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