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气象:2009,35(2):94-100
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2007年西北太平洋热带气旋活动综述
(中国气象局上海台风研究所, 中国气象局上海台风预报技术重点实验室, 20 0030)
Review of the Tropical Cyclone Activities over the Northwest Pacific in 2007
(1.Shanghai Typhoon Institute;2.Laboratory of Typhoon Forecast Technique, CMA, Sh anghai 200030)
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投稿时间:2008-09-11    修订日期:2008-12-23
中文摘要: 利用热带气旋年鉴、海温和大气环流再分析资料,分析2007年西北太平洋(包括南海)的风 暴级以上热带气旋(简称TC)活动状况及海 气条件。结果表明,相对于气候平均值,2007年 西北太平洋TC活动的季节峰期推后了约2个月, 源地明显偏北, 生成点纬度发生了2次明显跃变, 年度TC的总体活动较弱, 但个体的强度较强, 路径以西北行为主,登陆比例偏大。影响上述TC活动特征的一个重要原因是年内ENSO循环的位相使得上半年的大气环流不利因素居多, 而下半年大尺度上升运动、热带辐合带均较强, 副高偏北、局地垂直风切变较小和对流层低层较强的扰动活动等条件,也十分有利热带气旋活动。
中文关键词: 热带气旋  年度活动  西北太平洋
Abstract:In 2007, the tropical cyclone activity over the Northwest Pacific exhi bits the following features as compared to normal years: (1) the active tropical cyclone season shifts about 2 months later; (2) the area of tropical cyclogenes is is more northward and abrupt changes in latitudes of genesis occur twice in t he year; (3) the intensity of tropical cyclone as a whole is slightly weaker whi le individual one is more intense; and (4) there is a higher rate of landfall tr opical cyclones. These characteristics are associated with ENSO phenomenon which turns from El Nino to La Nina in the year. Consequently, a more favorable envir onment for tropical cyclones occurs since August, including the strengthened lar gescale ascending motions and ITCZ, the northward subtropic high, small local v ertical shear, and active turbulences in low troposphere.
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应明,余晖,梁旭东,李佳,2009.2007年西北太平洋热带气旋活动综述[J].气象,35(2):94-100.
Ying Ming,Yu Hui,Liang Xudong,Li Jia,2009.Review of the Tropical Cyclone Activities over the Northwest Pacific in 2007[J].Meteor Mon,35(2):94-100.