【摘要】 采用ERA5(2.5°×2.5°)再分析资料、CMA热带气旋最佳路径数据集及地面加密自动站等资料，分析了台风“鲶鱼”（1617）内核结构特征及其极端降水成因。研究结果表明：登台后，“鲶鱼”结构松散，强度减弱，在台湾海峡结构重构不明显，但其东北侧强的上升运动、假相当位温的陡峭区和密集区与极端降水落区均有很好的对应关系，可见台风自身结构特征对其降水落区预报具有重要指示作用。此外，强暖心的长时间维持配合台风偏东急流持续为降水区输送水汽、强的高层辐散低层辐合相互耦合作用等引发了福建多地极端降水过程。更多还原

【Abstract】 ERA5(2.5°× 2.5°) reanalysis data,CMA tropical cyclone optimal path data set and ground densified automatic station data, etc., the core structure characteristics of typhoon “Megi”(1617) and the causes of extreme precipitation are analyzed. The results showed that the structure of “Megi”was loose and the intensity was weakened after landing and the structural reconstruction in the Taiwan Strait was not obvious.However, the strong upward movement on the northeast side, the steep area and dense area of pseudo equivalent potential temperature and the extreme precipitation area has a good correspondence. It can be seen that the structural characteristics of the typhoon itself have an important role in the prediction of its precipitation area. In addition, the longterm maintenance of the strong warm center,the continuous transport of water vapor to the precipitation area by the typhoon easterly jet, and the strong interaction of high-level divergence and low-level convergence triggered the extreme precipitation process in Fujian.更多还原