摘要
利用2009年6月18-22日的1°×1°NCEP再分析资料、TBB资料等分析“莲花”的环境场和结构及其对路径的影响，环境流场分析结果表明：在19日11时～20日14时，“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，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。
Based on NCEP high resolution （1×1 grid） reanalysis dataset and TBB data from Jun 18 to Jun 22 in 2009, the impact of environmental condition and structures of ＂Lian hua＂ on its routine is analyzed. The results indicate that there are some deviations between the moving direction of ＂Lianhua＂ and its steering flow during the period from l lam on 19th to 2pm on 20th. ＂Lianhua＂ is characterized with evident asymmetric structure, especially in the lower troposphere, from 1 lain on 19th to 2pm on 20th, the northward movement of Lianhua is more associated with the strong lower level southerly jet to the east of Lianhua.Additionally, the asymmetric structure of ＂Lianhua＂ and its special routine can be also well exhibited in TBB distribution.
