1714号台风“帕卡”近海加强之特征与成因分析
Characteristics of Rapid Offshore Intensification of Typhoon Pakhar (1714) and Analysis of the Causation
DOI: 10.12677/CCRL.2018.75042, PDF,  被引量   
作者: 汪 彪*:中国人民解放军海军南海舰队海洋水文气象中心,广东 湛江;南京大学教育部中尺度灾害性天气重点试验室,江苏 南京;刘玉国:中国人民解放军海军南海舰队海洋水文气象中心,广东 湛江;陈 琛:上海市气象局,上海;未历航:中国人民解放军96631部队,北京
关键词: 台风“帕卡”台风近海加强副热带高压Typhoon Pakhar Rapid Offshore Intensification Subtropical High
摘要: 本文通过综合分析各类气象资料(如卫星云图、雷达回波、Micap3天气图和垂直风切变),对1714号台风“帕卡”近海加强的特征进行分析。主要结论如下:1) “帕卡”形成源自于西太副高南侧的东风波动,副高演变及引起的“北高南低”和“东高西低”的形势与“帕卡”的近海加强与发展密切相关;2) 孟加拉湾的西南季风气流、105˚E~110˚E附近越赤道气流和西太副高西侧东南气流三支汇合气流,为“帕卡”台风近海加强提供较为充沛的水汽条件,有利于其强度加强;3) 另外,在向西北方向移动的过程中,“帕卡”的垂直风切变都较小,有利于其暖心结构的维持和CISK机制的增强;4) 1713号台风“天鸽”和1714号台风“帕卡”都满足以上条件,呈现出近海加强的特点。
Abstract: Using the satellite imagery, radar echo, micap3 and wind shear data, this study researched diagnostically the characteristics and causation of the rapid offshore intensification of Pakhar (1714). Major results were listed as follows: 1) Pakhar originated from the easterly waves to the south of the subtropical high and the evolution of the subtropical high in western Pacific resulted in patterns of higher pressure in the north (east) than in the south (west), which is closely linked with the intensification of Pakhar’s circulation. 2) A southwesterly airflow from the Bay of Bengal, a cross-equatorial flow in 105˚E to 110˚E and a southeasterly flow on the western side of the subtropical high merged to supply abundant amount of water vapor to Pakhar. 3) Vertical wind shear was weak, divergent outflow was significant at upper levels, and positive vorticity was increasing in the eye of the typhoon, causing Pakhar to intensify. 4) Typhoon Pakhar (1714) and Hato (1713) show the characteristics of rapid offshore intensification with some similar meteorological conditions.
文章引用:汪彪, 刘玉国, 陈琛, 未历航. 1714号台风“帕卡”近海加强之特征与成因分析[J]. 气候变化研究快报, 2018, 7(5): 391-396. https://doi.org/10.12677/CCRL.2018.75042

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