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气象:2010,36(9):1-8
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“珍珠”(0601)异常急翘路径和内核结构变化的诊断分析及数值研究
(1.南京信息工程大学, 南京 210044;2. 海南省气象台, 海口 570203;3.国家气象中心, 北京 100081 ;4.中国气象局上海台风研究所, 中国气象局台风预报技术重点开放实验室, 上海 200030)
A Diagnosis and Numerical Study of an Abrupt Recurved Typhoon Chanchu and Its Inner Core Structure Evolution
(1.N;2.anjing University of Information Science & Technology, Nanjing 210044 Hainan Meteorological Observatory, Haikou 570203;3.National Meteorological Center, Beijing 100081;4.Laboratory of Typhoon Forecast Technique/CMA, Shanghai Typhoon Institute, Shanghai 200030;5.Nanjing University of Information Science & Technology, Nanjing 210044)
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投稿时间:2008-10-24    修订日期:2010-04-07
中文摘要: 使用FY2卫星TBB资料、NCEP最终分析资料(1°×1°)和中尺度模式WRF,对0601号强台风“珍珠”的“急翘”异常转向路径和内核结构变化进行诊断分析和数值模拟。结果表明:“珍珠”移向变化与环境引导气流和位涡倾向1波分量正异常有关,“急翘”前12小时,环境引导气流向北偏转,位涡倾向1波分量正异常对应着“珍珠”移动方向变化;内核非对称结构发展与环境风垂直切变演变有关,垂直切变使得涡旋倾斜,涡旋倾斜方向出现较强的上升运动,导致“珍珠”内核偏南象限对流活动较强。
Abstract:The abrupt recurved severe typhoon Chanchu and its inner core structure evolution are documented by using FY 2 TBB images, NCEP final analysis and the new generation mesoscale weather research and forecasting (WRF) model. Results show that the surrounding large scale steering flow and potential vorticity tendency play important roles in Chanchu movement. The rightward deflection of Chanchu is indicated by the surrounding large scale steering flow in advance. Chanchu is likely to move toward an area of maximum wavenumber 1 potential vorticity tendency. The evolution of inner core asymmetric structure is closely related to the environmental vertical wind shear. The shear induced tilt of the vortex has a dominant influence on the maximum upward motion in the southerly quadrant of Chanchu.
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基金项目:国家自然科学基金面上项目(40875039);国家自然科学基金重点项目(40730948);中国气象局上海台风研究所台风研究基金项目(2006STB07)共同资助
引用文本:
李勋,李泽椿,赵声蓉,曾智华,王勇,2010.“珍珠”(0601)异常急翘路径和内核结构变化的诊断分析及数值研究[J].气象,36(9):1-8.
LI Xun,LI Zechun,ZHAO Shengrong,ZENG Zhihua,WANG Yong,2010.A Diagnosis and Numerical Study of an Abrupt Recurved Typhoon Chanchu and Its Inner Core Structure Evolution[J].Meteor Mon,36(9):1-8.