摘要
2020年第4号台风“黑格比”8月4日登陆乐清,对温州市及温州机场影响重大。通过“黑格比”过程分析发现:本次台风过程,副高强且稳定,台风路径相对稳定,移动速度较慢;降水分布不均,风雨潮共作,影响较大;前期结构较松散,中后期结构清晰,近海突然快速加强;29℃~30℃适宜的海温、内核云系的收紧、水汽输送持久强盛、低层辐合高层辐散以及2~4 m/s弱的垂直风切变造成其近海突然快速加强,台风级别维持时间较久。台风预报服务需要重点关注登陆后的减弱情况,尤其是台风的移动情况及水汽输送情况。
On Aug.4,2020,No.4 Typhoon Hagupit landed on Yeqing,which has influenced a lot on Wenzhou City and Wenzhou Airport.Through the analysis of the process of“Hagupit”,subtropical high was strong and stable,the pathway of typhoon was relatively stable,and the movement speed was relatively slow;rainfall distribution was uneven,storm tide came together,so the influence was great;the structure in the early stage was loose,and that in middle and later stages was clear,and the speed offshore became fast;29℃~30℃suitable sea temperature,string core cloud system,powerful and prosperous water-vapor transfer lower layer convergence and high-rise divergence,and 2~4 m/s weak vertical wind shear caused its offshore sudden rapid intensity,and typhoon rank maintained in a long time.In typhoon forecasting service,it is suggested to focus on the weakening situation after landing,especially on the movement of the typhoon and water-vapor transfer situation.
作者
刘松波
Liu Songbo(Forecasting Room, Wenzhou Air Traffic Control Station, Wezhou 325024, China)
出处
《黑龙江科学》
2021年第20期36-37,40,共3页
Heilongjiang Science
关键词
副高
海温
角动量
水汽输送
散度
垂直风切变
Subtropical high
Sea temperature
Angular momentum
Water-vapor transfer
Divergence
Vertical wind shear
