摘要
本文利用常规、非常规气象资料，从环流背景、卫星图像和风廓线资料对今年正面影响闽北的“碧利斯”、“桑美”热带气旋进行分析后认为：“碧利斯”中心是低层前倾、高层后倾结构，不利于热带气旋中心附近出现强降水；而“桑美”中心是整层后倾结构，有利于热带气旋中心附近出现强降水。闽北的山脉地形对热带气旋降水影响很大：山脉迎风坡上的动力抬升作用对降水起到一定的增益作用，这种增益对实心结构的“桑美”作用更大，易在迎风坡面上出现大暴雨和强降水中心。
Tropical storm ＂Bilis＂ and ＂Saomai＂ which influenced north of Fujian province directedly were analyzed from circulation, satellite images and profile radar data by using unconventional and conventional data.The results show that ＂Bilis＂ slanted forward in low level and backward in high level, which is unfavorble for rainfall.But ＂Saomai＂ slanted in whole levels, which is favorable for rainstorm.Precipitation in the north of Fujian became more by the affect of mountain and the influence of mountain is more strong in ＂Saimao＂ .Severe rainstorm and strong precipitation center is windward slope are made by the effect of Dynamic ascend role of mountain.
关键词
热带气旋
强降水
风廓线
tropical storm heavy rain wind profile
