THE FORMATION MECHANISM OF CONCENTRIC DOUBLE EYEWALL TYPHOON-PART Ⅰ:DYNAMICAL ANALYSIS  

THE FORMATION MECHANISM OF CONCENTRIC DOUBLE EYE WALL TYPHOON—PART I:DYNAMICAL ANALYSIS

作　　者：彭加毅 方娟 伍荣生 

机构地区：[1]Department of Atmospheric Sciences,Nanjing Institute of Meteorology,KLME [2]Department of Atmospheric Sciences,LMSWE/MOE,Nanjing University

出　　处：《Acta meteorologica Sinica》2004年第3期301-312,共12页

基　　金：the National Natural Science Foundation of China under Grants 40205009,40175005,40075011 and 40333025;the Education Department of Jiangsu Province,and the Nanjing University Postdoctoral Foundation

摘　　要：The strong vortex will mutually adjust the thermodynamic field and dynamic field to a state of gradient balance whilst forced by an external cold source,namely,the gradient adjustment process,in which a linearized two-layer model is dealt with in this paper.The analyses show that on account of the heterogeneous radial distribution of the cold source,the adjustment of the thermodynamic and dynamic fields results in the two-peak tangential wind feature,which is analogous to the character of concentric double eyewalls in the strong typhoon.Consequently,the gradient adjustment may be one possible mechanism for the formation of a concentric double-eye typhoon.The strong vortex will mutually adjust the thermodynamic field and dynamic field to a state of gradient balance whilst forced by an external cold source,namely,the gradient adjustment process,in which a linearized two-layer model is dealt with in this paper.The analyses show that on account of the heterogeneous radial distribution of the cold source,the adjustment of the thermodynamic and dynamic fields results in the two-peak tangential wind feature,which is analogous to the character of concentric double eyewalls in the strong typhoon.Consequently,the gradient adjustment may be one possible mechanism for the formation of a concentric double-eye typhoon.

关 键 词：TYPHOON concentric double eyewalls gradient adjustment dynamical analysis 

分 类 号：P444[天文地球—大气科学及气象学]