【摘要】 利用2009年6月18～22日的1°×1°NCEP(美国环境预报中心)再分析资料和TBB(相当黑体亮温)资料等,分析"莲花"的环境场和结构对路径的影响。结果表明:19日11:00～20日14:00,"莲花"移动方向与引导气流方向有一定的偏离,这段时间里,"莲花"向偏北方向移动的主要原因是,"莲花"的低层风场存在较明显的非对称结构,在"莲花"的东侧,对流层低层出现了较强的偏南急流。TBB的分布对"莲花"的非对称结构有较明显、较直观的反应,尤其是对于几次短时间的路径偏折有很好的指示作用。更多还原

【Abstract】 Based on NCEP high resolution(1×1grid) reanalysis dataset and TBB data,this study investigates the impact of environmental flow and structures of No.0903 tropical cyclone Linfa on its track from June 18 to June 22,2009.The results indicate there are some deviations between the moving direction of Linfa and its steering flow during the period from 11am on 19th to 2pm on 20th,and the northward movement of Linfa is more associated with the strong lower level southerly jet to the east of Linfa.Additionally,the asymmetric structure of Linfa and its track deflection can be also well exhibited in TBB distribution.更多还原