THE FORMATION MECHANISM OF CONCENTRIC DOUBLE EYEWALL TYPHOON——PART Ⅱ:NUMERICAL SIMULATIONS  

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313-326,共14页

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

摘　　要：In the context of a non-hydrostatic axisymmetric compressible numerical model,the concentric double eyewall structure of the typhoon was replicated well to discuss the formation mechanism of concentric eyewall with the aid of gradient wind adjustment.Evidence suggests that in the weakening phase of the typhoon,the heterogeneous radial distribution of the sensible and convective latent heating over the sea surface will induce the gradient wind unbalance accompanied by mutual gradient wind adjustment between the thermodynamic field and dynamic fields,which results in a two-peak tangential wind and concentric double eyewall structure.In the context of a non-hydrostatic axisymmetric compressible numerical model,the concentric double eyewall structure of the typhoon was replicated well to discuss the formation mechanism of concentric eyewall with the aid of gradient wind adjustment.Evidence suggests that in the weakening phase of the typhoon,the heterogeneous radial distribution of the sensible and convective latent heating over the sea surface will induce the gradient wind unbalance accompanied by mutual gradient wind adjustment between the thermodynamic field and dynamic fields,which results in a two-peak tangential wind and concentric double eyewall structure.

关 键 词：TYPHOON concentric double eyewalls gradient wind adjustment numerical simulation 

分 类 号：P444[天文地球—大气科学及气象学]