一次台风变性过程的锋生位涡反演诊断  

DIAGNOSIS OF THE DEVELOPMENTAL MECHANISM OF AN EXTRATROPICAL TRANSITION OF TROPICAL CYCLONES USING OF POTENTIAL VORTICITY INVERSION OF FRONTOGENESIS

作　　者：周毅[1] 肖坤[1] 宋辉[1] 

机构地区：[1]解放军理工大学气象学院,江苏南京211101

出　　处：《热带气象学报》2010年第6期694-701,共8页Journal of Tropical Meteorology

基　　金：自然科学基金(40805046;10871099);公益性行业(气象)专项课题(GYHY(QX)2007-06-15;GYHY(QX)2009-06-09)共同资助

摘　　要：采用锋生位涡反演诊断方法,对一次发生在西太平洋上的台风变性过程进行了诊断分析和机制研究。主要从锋生演变的角度,定量诊断了西风带高空冷涡低槽的动力强迫作用、中纬斜压锋区扰动、台风环流本身以及非平衡风场在台风变性过程的不同阶段所起的作用和影响,并对以上各物理过程的相互作用、造成台风变性以及变性后再度增强的演变发展机制进行了分析讨论。结果表明,台风变性过程具有显著的非平衡特征,在台风变性过程的不同阶段具有明显不同的发展演变机制。This paper diagnoses and analyses the developmental mechanism of a process of extratropical transition of tropical cyclones which occured on West Pacific Ocean based on potential vorticity inversion of frontogenesis diagnosis method.The study diagnoses quantitatively the action and affection of dynamic influence of westerly cold trough,middle latitude baroclinic frontal zone,cyclone cycle and inbalanced wind field during the different stages of the extratropical transition of tropical cyclones,and also discusses the interaction between them and the developmental mechanism of the extratropical transition of tropical cyclones.The results show that：there are different developmental mechanisms during each stage of the extratropical transition of tropical cyclones,and the processes are also unbalanced.

关 键 词：台风变性 锋生过程 位涡反演 诊断分析 

分 类 号：P456.7[天文地球—大气科学及气象学]