| 西北太平洋台风同心眼墙影响因子的初步分析 |
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| 引用本文： | 管靓,张宇昕,葛旭阳,姜有山.西北太平洋台风同心眼墙影响因子的初步分析[J].大气科学学报,2019,42(4):492-501. |
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| 作者姓名： | 管靓 张宇昕 葛旭阳 姜有山 |
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| 作者单位： | 上海海洋中心气象台;南京信息工程大学气象灾害教育部重点实验室/气象灾害预报预警与评估协同创新中心/气候与环境变化国际合作联合实验室;镇江市气象局;南京市气象台 |
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| 基金项目： | 国家自然科学基金资助项目（41575056）；国家重点基础研究发展计划（973计划）项目（2015CB452803）；江苏省高校自然科学研究重点项目（14KJA170005） |
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| 摘 要： | 利用美国威斯康星大学气象卫星研究合作院提供的集成微波图像资料和联合台风预警中心的最佳路径资料,普查2005—2014年西北太平洋地区具有同心眼墙结构的35个强台风个例。对比分析了有、无同心眼墙及同心眼墙生成快、慢的样本的环境场和自身初始结构差异。结果表明:环境场要素对同心眼墙形成与否具有重要调制作用,环境场相对湿度越大,海温越高,同心眼墙越易生成;而同心眼墙的形成速率与自身结构存在密切关系,初始涡旋尺度越大,同心眼墙生成越快,外眼墙位置距离台风中心越远,眼墙替换时间越长,眼墙替换前后强度变化越明显。
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| 关 键 词： | 同心眼墙 热带气旋 初始结构 环境场要素 |
| 收稿时间： | 2018/3/16 0:00:00 |
| 修稿时间： | 2018/5/10 0:00:00 |
Preliminary analysis on influencing factors of secondary eyewall formation over Northwest Pacific |
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| GUAN Liang,ZHANG Yuxin,GE Xuyang and JIANG Youshan.Preliminary analysis on influencing factors of secondary eyewall formation over Northwest Pacific[J].大气科学学报,2019,42(4):492-501. |
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| Authors: | GUAN Liang ZHANG Yuxin GE Xuyang and JIANG Youshan |
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| Institution: | Shanghai Marine Meteorological Center, Shanghai 200030, China;Key Laboratory of Meteorological Disaster, Ministry of Education(KLME)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Joint International Research Laboratory of Climate and Environment Change(ILCEC), Nanjing University of Information Science & Technology, Nanjing 210044, China,Zhenjiang Meteorological Bureau, Zhenjiang 212001, China,Key Laboratory of Meteorological Disaster, Ministry of Education(KLME)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Joint International Research Laboratory of Climate and Environment Change(ILCEC), Nanjing University of Information Science & Technology, Nanjing 210044, China and Nanjing Meteorological Observatory, Nanjing 210019, China |
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| Abstract: | Based on the Morphed Integrated Microwave Imagery data from Cooperative Institute for Meteorological Satellite Studies of University of Wisconsin and the best track data from Joint Typhoon Warning Center,the tropical cyclones(TCs) with secondary eyewall over the Northwest Pacific are examined.During 2005-2014,35 TCs with secondary eyewall are identified.The composited studies are performed to reveal the differences in environmental fields and initial structures between TCs with and without secondary eyewall (between fast and slow samples of secondary eyewall formation).Results show that both the environmental fields and initial structures can modulate the secondary eyewall formation.Specifically,the larger relative humidity of the environment field and the higher sea surface temperature,the easier the secondary eyewall will be formed.Furthermore,the formation rate of secondary eyewall is closely related to its own structure.A larger scale initial vortex leads to a faster secondary eyewall formation,father location of outer eyewall from typhoon center,longer duration of eyewall,and more dramatic intensity change before and after eyewall replacement. |
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| Keywords: | secondary eyewall tropical cyclone initial structure environmental factor |
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