0515台风“卡努”登陆后强度衰减的诊断分析  

Diagnosis of the intensity weakens of typhoon 0515 "Khanun" after landing

作　　者：赵凯[1] 张银意[2] 唐红升[1] 

机构地区：[1]江苏省气象台,江苏南京210008 [2]连云港市气象局,江苏连云港226300

出　　处：《台湾海峡》2008年第3期372-375,共4页Journal of Oceanography In Taiwan Strait

摘　　要：分析了0515号台风"卡努"登陆后强度衰减的原因.通过物理量诊断分析后发现:(1)正涡度平流对台风强度的维持和发展起到重要作用,负涡度平流减弱了台风强度.(2)台风上空的温度平流上、下层之差(ΔTA<0)为正时,则增强台风强度,反之,减弱台风强度.台风有向其移向前方的正值中心区偏折的趋势.(3)台风登陆后,水汽输送明显减弱,且在登陆阶段减弱最厉害.台风上空水汽辐合层的高度降低、辐合强度的减小,预示着台风强度的减弱.This paper analyses the reasons of its intensity weakens after No. 0515 typhoon ＂Khanun＂ landing. By the physical quantity diagnostic analysis it is found that firstly the positive vorticity advection played the vital role to the typhoon intensity maintenance and developing. The negative vorticity advection has weakened typhoon intensity. Secondly, as the thermal advection difference between upper and low level （referred as ATA hereafter） over typhoon was positive/negative, the typhoon intensity was reinforced/weakened. The typhoon intended to move forward to the positive value area of ATA. At last, the moisture transportation weakened obviously after typhoon landfall, with its sharp decrease in the period of landing. The height of moisture convergence level depressing and the convergence intensity weakening indicated that the typhoon intensity was reduced.

关 键 词：登陆台风 过程分析 强度衰减 

分 类 号：P731[天文地球—海洋科学]