台风涡旋螺旋波及其波列传播动力学特征:诊断分析  

DYNAMIC CHARACTERISTICS OF TYPHOON VORTEX SPIRAL WAVE AND ITS TRANSLATION:A DIAGNOSTIC ANALYSES

作　　者：徐祥德[1] 张胜军[1] 陈联寿[1] 魏凤英[1] 

机构地区：[1]中国气象科学研究院,北京100081

出　　处：《地球物理学报》2004年第1期33-41,I001,共10页Chinese Journal of Geophysics

基　　金：国家科技部专项项目(2 0 0 1DIA2 0 0 2 6);国家自然科学基金项目(4 9975 0 13 )

摘　　要：运用台风移动涡旋影响域统计分析动态区域序列概念 ,采用 3个目标台风卫星TBB 资料 ,对台风螺旋云带波列结构特征进行了功率谱合成分析。研究结果揭示出台风涡旋中心与周边区域对流云的相关场呈螺旋带波状特征 ;台风影响域螺旋波亦表现出显著次天气、中尺度波动特征 ,其波动周期尺度及其传播相速可类似重力内波与涡旋Rossby波 ,即周期呈双峰特征 ,为大于 6h与 2 4h左右时间尺度 ;螺旋波高、低空流型特征与台风的维持、发展结构特征相关 ;扰动TBB场时间偏差分布呈类似涡旋Rossby波螺旋波列 ,其波列路径与涡旋Rossby波传播特征相似 。By using the power spectrum analysis and the T BB time serial data, the wave train characteristics of typhoon spiral band are analyzed in a relative coordinate centered on the typhoon center for three typhoons as the targets of case study. The results show that the correlation coefficient field between the T BB on and around the eye presents remarkable wave characteristics of spiral band. There exists a distinct characteristic of sub synoptic scale and meso scale wave in typhoon spiral band with above 6h and about 24h time scale, and their phase speeds are similar to those of inner gravity wave and vortex Rossby wave. The high and low level streams of the spiral bands have close relation with the sustaining and developing of typhoon. In addition, the deviation distribution of the disturbed T BB is similar to the vortex Rossby wave train, and the structure model of the typhoon vortex spiral wave is put forward.

关 键 词：台风 涡旋螺旋波 传播 动力学 波列 

分 类 号：P458.124[天文地球—大气科学及气象学]