台风“韦森特”路径突变和近海加强的成因分析  

ANALYSIS ON THE UNUSUAL TRACK AND INTENSIFICATION OF TYPHOON “VICENTE”

作　　者：李霞[1,2] 何如意[2] 段朝霞[2] 吴乃庚[1,2] 

机构地区：[1]区域数值天气预报重点实验室,广东广州510080 [2]广州中心气象台,广东广州510080

出　　处：《热带气象学报》2014年第3期533-541,共9页Journal of Tropical Meteorology

基　　金：广东省科技计划项目(2011A032100006;2012A061400012)共同资助

摘　　要：利用FY2D卫星资料、美国国家环境预报中心(NCEP/NCAR)的再分析资料等,分析了"韦森特"路径突变和近海加强的成因。结果表明,"韦森特"快速偏西行后突然停滞原地长时间打转的奇异路径主要归结于三大因素:西太平洋副高减退导致引导气流明显减弱,使台风路径多变;"韦森特"风场强风速区呈逆时针转移造成台风移向改变;中心重组过程导致中心位置停滞少动。高空强辐散、弱的风垂直切变和中低层强盛的西南气流输送是"韦森特"近海加强的重要原因。较好的湿热条件促进了"韦森特"显著加强。Based on the FY-2D satellite data and NCEP/NCAR reanalysis data sets, the unusual track and intensity variations of typhoon Vincente are investigated. The results suggest that three factors make Vincente suddenly stop moving west fast and then loop for a long time. Firstly, the eastward recession of the western Pacific subtropical high leads to weaker steering flow and changeable track. Secondarily, a strong wind field moves counterclockwise to change Vincent＇s direction of movement. Thirdly, the eye stagnates for reorganization. Strong divergence in the upper level and an intense southwest airflow in the middle and lower level, and weak vertical wind shear cause Vincent to intensify. The merging of active mesoscale convective cloud clusters with the tropical cyclone circulation strengthens Vincent significantly.

关 键 词：天气学 成因分析 对比分析 韦森特 路径突变 近海加强 

分 类 号：P444[天文地球—大气科学及气象学]