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投稿时间：2015-02-06 修订日期：2015-12-15
投稿时间：2015-02-06 修订日期：2015-12-15
中文摘要: 利用地面观测资料、台风定位资料、ECMWF全球再分析资料等，采用TC降水天气图客观识别法(OSAT)、TC路径相似面积指数（TSAI）和气流轨迹模式HYSPLIT等方法，从2013年第23号强台风菲特在我国东南沿海引发台风暴雨的极端性分析及其成因诊断入手，揭示了双台风作用对极端暴雨的增强作用。结果表明：首先，强台风菲特给浙江带来了自1958年以来单站日降水排名第二的极端降水，余姚和奉化日降水量均为395.6 mm；“菲特”降水过程有两个明显的强降水阶段。其次，秋季强台风菲特登陆后之所以出现如此强度且持续的台风暴雨，与超强台风丹娜丝的存在密不可分。在强降水第一阶段，双台风作用促成了降水的极端性，“丹娜丝”向降水区域输送了约79.0%的水汽，对杭州湾南侧的强降水过程有重要贡献；在“菲特”强降水第二阶段，“菲特”的环流已经基本消散，超强台风丹娜丝与冷空气的共同作用主导了这一阶段强降水的发生。
中文关键词: 强台风菲特，极端降水，成因诊断，双台风作用
Abstract:By using the surface observational data, typhoon track data and ECMWF global reanalysis data, as well as the objective synoptic analysis technique (OSAT), tropical cyclone (TC) track similarity area index (TSAI) and the airflow trajectory model (HYSPLIT4.9), this paper analyzes the characteristics and the causes of the extreme precipitation created by the Severe Typhoon Fitow over the coastal region of Southeast China, and reveals the intensification role of binary typhoons in extreme precipitation. First, Fitow causes the maximum daily precipitation of 395.6 mm in Yuyao and Fenghua, which ranks the second daily extreme TC precipitation in Zhejiang Province in record. Two distinct intense precipitation stages are found in the precipitation process. Secondly, such intense and continuous rainfall during and after Fitow’s landfall is mainly due to the existence of Super Typhoon Danas. In the first stage of the severe precipitation the interaction of the binary tropical cyclones contributes to the extremity, causing Fitow to move much faster than before. Moreover, Danas transports about 79% moisture to the raining region, acting as an important contributor to the extreme precipitation over the southern coast of Hangzhou Bay. In the second stage, as the circulation of Typhoon Fitow almost dissipates, the combined interaction of Super Typhoon Danas and cold air causes the occurrence of the extreme precipitation.
keywords: Severe Typhoon Fitow, extreme precipitation, diagnostic analysis, effect of binary tropical cyclones
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基金项目:国家重点基础研究发展计划(973计划)（2015CB452806）和国家自然科学基金项目(41375056和91224004)共同资助
引用文本：
谢惠敏,任福民,李国平,马梁臣,邱文玉,2016.超强台风丹娜丝对1323号强台风菲特极端降水的作用[J].气象,42(2):156-165.
XIE Huimin,REN Fumin,LI Guoping,MA Liangchen,QIU Wenyu,2016.Role of Supper Typhoon Danas in the Extreme Precipitation Caused by Severe Typhoon Fitow[J].Meteor Mon,42(2):156-165.
谢惠敏,任福民,李国平,马梁臣,邱文玉,2016.超强台风丹娜丝对1323号强台风菲特极端降水的作用[J].气象,42(2):156-165.
XIE Huimin,REN Fumin,LI Guoping,MA Liangchen,QIU Wenyu,2016.Role of Supper Typhoon Danas in the Extreme Precipitation Caused by Severe Typhoon Fitow[J].Meteor Mon,42(2):156-165.