摘要
利用建阳CINRAD雷达6分钟一次的观测资料，对2006年8月11日台风“桑美”影响闽北的暴雨过程的回波资料进行分析。结果表明，南平市中北部7个县市的强降水（6—9时松溪、政和的第二次强降水除外）主要是由台风内螺旋雨带造成的；南平市南部建瓯的强降水及东部（松溪、政和）的第二次强降水主要是由台风外螺旋雨带造成的。雷达风廓线产品VWP能很好地反映出台风中心的相对位置变化，这对确定台风中心很有帮助。基本径向速度V可确定辐合、辐散及涡流、风切变等特征，其零速度线的弯曲或折角及正负速度极值区对降水的发生、发展或减弱趋势有指示作用。垂直积分液含水量VIL能确定大多数强风暴位置，对短时强降水的落区预报有很好的指示作用，这在一定程度上弥补了建阳CINRAD雷达降水产品的不足。
Based on the Jianyang CINRAD radar data , the echo data created the rainstorm process by Typhoon ＂ Saomai＂ on August 11, 2006 in Northern Fujian was analyzed. The result showed that, the heavy rain of the seven Meteorological Stations （except the second heavy rain of Songxi and Zhenghe Stations during six to nine o＇clock ） in the north-central Nanping city are mainly created by the inside spiral rain bands of the typhoon , the heavy rain of Jian＇ou Station （ in the southern Nanping city） and the second heavy rain of Songxi and Zhenghe Stations （ in the eastern Nanping city） are mainly created by the outside ones. Based on the VWP products, the relative position changes of typhoon center, which help to determine the typhoon center, can be reflected well. Based on the V and the bending or angular of its zero-speed line and the extreme of its plus or minus speed area, the convergence and divergence and swirl, wind shear and other features can be recognized, and the development or weakening trend of precipitation can be instructed. Based on the VIL, most of the strong storm positions will be determined, which help to instruct the short-term forecasting of the short-term heavy rain area well, and compensate for the lack of precipitation products of the Jianyang CINRAD radar in a certain extent.
