登陆台风产生江苏大风的动力学诊断  

Diagnostic Analysis of Dynamicals of Damage Wind Caused by Landing Typhoon in Jiangsu Province

作　　者：赵凯[1] 沈树勤[1] 孙燕[1] 

机构地区：[1]江苏省气象台,江苏南京210008

出　　处：《安徽农业科学》2009年第20期9553-9557,共5页Journal of Anhui Agricultural Sciences

基　　金：江苏省社会发展项目"BS2006086";"BS2006087";江苏省气象局课题"200506"

摘　　要：研究了0515号登陆台风"卡努(Khanun)"产生江苏大风的动力机理,采用物理量诊断方法,对"卡努"产生江苏大风的发生发展机制进行了研究。结果表明,矢量风场可以分解为涡度风、散度风、伸长变形风及切变变形风;涡度风是台风的基本风场,对台风风场的维持与发展起主要作用,也是产生江苏大风的主要风场;散度风对台风水平风场的贡献最小,它是低层产生辐合上升运动的主要动力因子,而对于台风外围大风强度的差异与变化,变形项起着更为明显的作用;变形项对台风的转向起主要作用。Kinetic and develoed mechanism of the damage wind caused by the No. 0515 typhoon ＂Khanun＂ in Jiangsu province was studied by the diagnosis of physical quantity. The results showed that wind vector was consisted of vorticity wind, divergence wind, strength transfiguration wind and shear transfiguration wind. Vorticity wind was the fundamental wind of typhoon. It maintained and developed typhoon wind field, also it was main wind vector that caused the damage wind in Jiangsu. Divergence wind contributes on the level wind field of typhoon minimumly. It was the main driving force of convergence and ascending motion at low level. Transfiguration takeed more obvious action on the divergence and chance of the intensity of damage wind outer of typhoon. It also takeed the main action of the typhoon turns direction.

关 键 词：登陆台风 大风 变形向量 涡度风 散度风 

分 类 号：P731[天文地球—海洋科学]