一次台风暴雨过程的诊断分析

Diagnostic Analysis of a Typhoon and Rain Process

本文利用MICAPS常规观测资料对2014年7月24日~25日影响山东的台风“麦德姆”进行研究,着重分析其路径、形成暴雨的成因和物理量等。研究表明本次过程是一次北上台风影响山东的过程。强大副高的阻挡是本次过程的特殊环流形势,使得台风一直保持较高的偏北分量,为本次暴雨形成提供了有利条件。台风沿副高外围引导气流先向北后向东北方向移动,在鲁中东部和半岛降水条件非常有利,此次降水主要发生在台风中心附近和东北象限区域内,台风外围云系与冷空气相互作用可能造成短时强降水。

In this paper, the MICAPS conventional observation data is used to study the typhoon "Matmo"which affects Shandong from July 24th to 25th, 2014, focusing on the analysis of its path and the causes and physical quantities of heavy rain. Studies have shown that this process is a process of typhoon north affecting Shandong. The blockage of the strong sub-high is the special circulation situation of this process, which makes the typhoon always maintain a high northerly component, which provides favorable conditions for the formation of heavy rain. The typhoon moves along the periphery of the subtropical high to move northward and backward to the northeast. The precipitation conditions in the eastern part of Shandong Province and the peninsula are very favorable. The precipitation mainly occurs in the vicinity of the typhoon center and the northeast quadrant. The typhoon’s peripheral cloud system and the cold air interact with each other. The effect may be caused by short-term heavy precipitation.