摘要
本文对9914号台风暴雨的环流形势，物理量场、云图特征及地面中小尺度系统进行初步分析，分析结果表明台风登陆前后福建省东部海区中低空东南急流的加强。为东部地区暴雨的产生提供了有利的热力、水汽及不稳定条件。地面中尺度辐合区和闽南沿海特殊的地形对台风暴雨起了加强作用。强降水发生在云顶温度梯度最大区域与〈-10℃／h的云顶变温相重叠的区域内。
From the research of the circulation, physical features, satellite photos, small and mid-length system of the TY9914, it shows that the SW jet is strengthened on the low and mid-high altitude in the eastern sea area to Fujian province during its landing, which provides a favorable background such as the thermodynamic, vapor and unstable condition etc. The mid-length convergence zone on the surface and the topographic forcing at the south seaside of Fujian province are also do good to the storm. The heavy rainfall always break out where great gradient of the cloud-top-temperature lies and the temperature variability is below 10℃/h.
关键词
台风
暴雨
物理量
云顶温度
中尺度辐合系统
typhoon storm
physical feature cloud-top-temperature mid-length convergence area
