1013号超强台风“鲇鱼”北折路径分析  

The characteristic analysis of the north-turning track of super typhoon "Megi" (1013)

作　　者：段朝霞[1] 苏百兴[1] 

机构地区：[1]广东省气象台,广东广州510080

出　　处：《海洋预报》2011年第5期21-24,共4页Marine Forecasts

基　　金：广州市科技攻关计划重大项目"亚运会气象预报服务系统研究"(2007Z1-E0101);广东省科技计划项目"亚运会气象预报服务系统研究"(2009A030302012)

摘　　要：应用日本JMA数值产品的格点资料和实况场分析资料,重点对1013号超强台风"鲇鱼"西行进入南海后发生近90°直角转向偏北移动,直至登陆福建的这一阶段路径进行分析。"鲇鱼"先是受位于华南的西环大陆副高引导,向西南西移动,之后转受加强北上的赤道高压引导,折向北到北偏东方向移动,最后受东环副高引导北偏西行至登陆福建。在这3个主要影响系统的先后转换过程中,分析500 hPa台风环流风场不对称分布可明显看到,"鲇鱼"受到不同天气系统的影响时,台风风场中最大风速区的位置也随之发生相应变化,因此"鲇鱼"出现了曲折多变的复杂路径。Based on the JMA reanalysis data and the observational data,the north-turning track characteristics of super typhoon＂Megi＂were analyzed here.＂Megi＂moved towards west-southwest leaded by the west part of con-tinental subtropical high at first.Then＂Megi＂turned towards north to northeast under the guidance of intensified equatorial high which moved towards north.＂Megi＂moved towards northwest leaded by east part of subtropical high until＂Megi＂landed on Fujian.The analysis of asymmetric wind structure of the 500hPa level typhoon showed that the region of maximum wind speed centre of＂Megi＂changing under different weather system.Hence typhoon＂Megi＂moved with many twists and turns.

关 键 词：副热带高压 赤道高压 风场不对称 超强台风“鲇鱼” 

分 类 号：P444[天文地球—大气科学及气象学]