摘要
利用1°×1°NCEP/NCAR再分析资料计算了0606号台风“派比安”的物理量场,结合常规气象资料对“派比安”台风的运动路径、长时间大风以及暴雨特点进行诊断分析,结果表明:1台风过程后期华北大槽减弱北收,副高迅速加强西伸,同时“派比安”旋转风结构中始终存在向西北偏西方向偏转的倾向,副高与台风之间的气压梯度增大,引导了“派比安”向偏西北方向移动;2强散度柱与强涡度柱形成耦合机制,促成了强的垂直上升运动,使台风登陆后中心气压填塞缓慢。台风环流没有出现某一部位突然衰减或增强,是造成大风持续时间长的主要原因;3“派比安”生成于热带辐合带中,台风结构对称,登陆后,一直处在小于10m·s-1的风垂直切变环境之中,水汽源源不断的输入台风环流中,是造成暴雨持续时间长、强度大的主要成因。
Based on the observational data, satellite images, radar echo, auto weather station data and NCEP reanalysis data of 1°×1°with 6h interval, the moving path of typhoon ＂Prapiroon＂ and the features of the lasting gale and heavy rain caused by it are analyzed. Results show that （1） the north northwest tendency in the rotational wind structure increases the gradient between the strengthening subtropical high and the typhoon, which leads ＂Prapiroon＂ move to the northwest. （2） The strong divergence column couples with the strong vortex and the extremely intensive ascendant motion enhances, and the center pressure adjustment without suddenly attenuation or increasing, which is the main reason for the lasting gale. （3） The ＂Prapiroon＂ born in the intertropical convergence zone with the symmetric structure and in the weak vertical shear after landing and the continuous water vapor are the main cause for the extreme and longtime lasting rainstorm.
出处
《气象研究与应用》
2007年第2期1-6,共6页
Journal of Meteorological Research and Application
关键词
台风“派比安”
路径
风灾
暴雨
Prapiroon typhoon
path
wind damage
torrential rain
