1319号超强台风“天兔”强度变化的诊断分析  

Diagnostic Analysis Intensity of Super TY“Usagi”

作　　者：于玲玲[1] 麦健华 程正泉[1] 

机构地区：[1]广东省气象台,广东广州510080 [2]中山市气象局,广东中山528400

出　　处：《广东气象》2014年第1期7-11,19,共6页Guangdong Meteorology

基　　金：广东省气象局科技创新团队(201101);广东省科技计划项目(2011A032100006);公益性行业(气象)科研专项经费(GYHY20120610)共同资助

摘　　要：利用观测资料和NCEP再分析资料,对超强台风"天兔"海上快速加强及登陆快速减弱期间的相关物理量做了初步诊断分析,结果表明:(1)高的海温,西南季风、越赤道气流持续与"天兔"保持联结,充沛的水汽供应,弱的垂直风切变及强烈的高空辐散与低层辐合的高低层环流配置,是"天兔"快速加强的主要原因;(2)"天兔"登陆后强度迅速减弱的原因与登陆后陆面摩擦消耗能量、登陆前后大气干冷、高低层垂直风切变加大、低层水汽输送被切断以及高空辐散减小等有关。In this paper, the observations and NCEP analysis are used to study the Super TY ＂Usagi＂ intensifying fast at the sea and weakening fast on the land, and our diagnostic analysis results are shown as follows： （a） high sea temperature; the involvement of the southwest monsoon, cross-equatorial flow and supply of water vapor, weak vertical wind shear and the circulation of upper level divergence and low - level convergence are the main reasons of the intensifying of ＂Usagi＂ ; （2） the reasons of weakening fast after ＂Usagi＂ landing are as follows： the energy are consumed because of the land friction and atmosphere is stable before and after its landing, vertical wind shear is increasing, the water vapor transport is cut, and the divergence in 200 hPa is weakening.

关 键 词：天气学 台风“天兔” 台风强度 物理量场 

分 类 号：P458[天文地球—大气科学及气象学]