摘要
采用ＴＣＭ－９０台风现场科学试验期间加密观测资料，揭示出目标台风Ｆｌｏ非对称动力、热力结构及其转向运动的特征，尤其通过分离处理的偏差场，突出了ＴＣＭ－９０现场试验有关飞机下投（ｄｒｏｐｓｏｎｄｅ）加密探测资料对台风Ｆｌｏ内部非对称结构物理图象的描述，提出了实际台风动力结构存在类似Ｇｒａｙ认为的非对称偶极子型，即中低层“β陀螺”偶极子型（β－ｔｏｐｄｉｐｏｌｅ），及其“通风流”（Ｖｅｎｔｉｌａｔｉｏｎｆｌｏｗ）特征，高层辐合－辐散结构的变形偶极子系统概念模型，并认为这类三维非对称结构对台风运动（转向现象）有一定“引导”作用。文中还强调了“β陀螺”偶极子非对称结构的垂直差异，并揭示了目标台风暖心结构及其热力非对称结构特征。
sing intense observational data during TCM-90 field experiment,the asymmetric dynamic and thermodynamic struture and its characteristics relating to typhoon recurvature movement are revealed. Based on the decoposition processing of TCM-90 target typhoon data,the actual characteristics of TC's asymmetric structure. namely,'β-top'dipole and 'ventilation flow' systems are obtained,which are quite similar to results of Gray W[5](1991).Moreover.it is found that by analyzing the upper level streamline field. another kind of 'divergence-convergence dipole'pattern structure is related to typhoon motion. The present paper also proposed the concepts of the vertical difference of the'β-top'dipole dynamic struture and asymmetric thermodynamic structure.the typhoon'warm core' can be described by the analysis of TCM-90 target typhoon intenseobservational data.
出处
《气象学报》
CSCD
北大核心
1996年第5期536-543,共8页
Acta Meteorologica Sinica
基金
国家重点科技攻关项目
关键词
β陀螺
通风流
非对称结构
台风
动力结构
top'.'Ventilation flow'.Divergence-convergence dipole,Asymmetric structure.
