漳州市0604号强热带风暴强降水天气学诊断分析

Synoptic Diagnostic Analysis of No.0604 Severe Tropical Storm Heavy Rainfall in Zhangzhou

从高低空环流场分析了强热带风暴"碧利斯"的移动路径及其登陆后造成的漳州市强降水成因,结果表明:在福建登陆后西行南折的强热带风暴,是造成漳州7月14日20时16日20时强降水的直接原因;高层冷平流、低层暖平流为暴雨产生提供了稳定度条件;中高层正涡度平流的辐散抽吸作用,为暴雨产生提供了动力条件;来自副高西侧的偏南气流、南侧的东南气流和来自孟加拉湾的西南气流,为漳州的强降水提供了水汽条件。此外,台湾地形对台风的削弱作用不明显,也是"碧利斯"造成漳州市强降水的原因之一。

In the sight of the circulation field in high - low air, the article puts emphasis on the analysis of the moving path of the severe tropical storm ＂Bilis＂ and the reasons of the heavy rainfall occurred in Zhangzhou. The results show the severe tropical storm which moves westward and southward after land- ing in Fujian is the direct reason for the heavy rainfall at 20：00 during July 14 - 20. The cold advection in upper level and warm adveetion in lower level provide stability condition for storm. The radiation suction action of positive vorticity advection in mid - upper level provides dynamic condition for storm. The southern flow from subtropical high western, the southeast flow from southern and southwest flow from Bay of Bengal provide water vapour condition for the heavy rainfall in Zhangzhou. The geographical location of Taiwan can＇t weaken typhoon greatly, which is the one of reasons that ＂Bilis＂ causes the heavy rainfall in Zhangzhou.