[1]黄滢,黄春华,林文桦.台风“威马逊”登陆后长时间维持原因分析[J].气象研究与应用,2019,40(04):24-27,49.
　Huang Ying,Huang Chunhua,Lin Wenhua.Analysis of the reasons for the long-term maintenance of Typhoon Rammasun after landing[J].Journal of Meteorological Research and Application,2019,40(04):24-27,49.
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台风“威马逊”登陆后长时间维持原因分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第40卷
期数:
2019年04期
页码:
24-27,49
栏目:
天气气候
出版日期:
2019-12-30

文章信息/Info

Title:
Analysis of the reasons for the long-term maintenance of Typhoon Rammasun after landing
作者:
黄滢;  黄春华;  林文桦
广西防城港市气象局, 广西 防城港 538001
Author(s):
Huang Ying;  Huang Chunhua;  Lin Wenhua
Fangchenggang Meteorological Service, Fangchenggang Guangxi 538001
关键词:
威马逊; 长时间维持; 天气学诊断; 热力学诊断
Keywords:
Rammasun; long-term maintenance; synoptic diagnosis; thermodynamic diagnosis
分类号:
P458.1+24
摘要:
超强台风威马逊（1409）在华南三次登陆，登陆后减弱缓慢，带来了狂风暴雨和巨大的经济损失。利用NCEP再分析资料、CMABST最佳台风路径数据等资料，对"威马逊"长时间维持的原因进行天气学和动力学诊断分析，结果表明：（1）500hPa副高西伸发展，紧随着台风，副高和台风环流之间维持较强的气压梯度和水汽输送，有利于台风环流的维持。850hPa西南季风急流和越赤道气流合并卷入台风低压环流中，输送的水汽和不稳定能量是台风在登陆后衰减缓慢的重要原因。高空存在强流出气流，高层辐散抽吸作用有利于台风强度的维持和发展。（2）台风移向下游区域海温偏高、环境风垂直切变小、强盛水汽输送是台风强度维持的重要环境条件。台风登陆后涡度和垂直速度结构完整，减弱缓慢，利于台风环流的维持。台风移入的华南地区处于热力不稳定状态，有利于对流凝结潜热效率的增加和台风环流内对流活动的增强，从而有利于台风强度的维持。
Abstract:
The super typhoon Rammasun (1409) landed three times in South China, and it weakened slowly after landing, which brought violent storms and large economic losses. Based on NCEP reanalysis data and CMABST optimal typhoon path data, the synoptic and dynamic diagnostic analysis of the reasons for the long-term maintenance of Rammasun was carried out. The results showed that:(1) the development of 500 hPa subtropical high was closely followed by typhoon. The strong pressure gradient and water vapor transport between the subtropical high and typhoon circulation were favorable for the maintenance of typhoon circulation. The 850hPa southwest monsoon jet and the cross equatorial current merged into the typhoon low-pressure circulation, and the water vapor and unstable energy transported were important reasons for the slow decay of the typhoon after landing. There was a strong effluent airflow at high altitude, and the high-level divergence pumping effect was beneficial to the maintenance and development of typhoon intensity.(2) The sea temperature in the downstream area where the typhoon moved was high, the vertical shear of the ambient wind was small, and the water vapor transport was strong, which were important environmental conditions for maintaining the typhoon intensity. After landing, the structure of vorticity and vertical velocity was complete and weakened slowly, which was conducive to the maintenance of typhoon circulation. The South China region where the typhoon moved was in a state of thermal instability, which was conducive to the increase of convective latent heat efficiency and the enhancement of convective activity in the typhoon circulation, thus contributing to the maintenance of typhoon intensity.

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相似文献/References:

[1]洪展.一次台风暴雨过程的水汽特征分析[J].气象研究与应用,2014,35(04):16.
[2]韦昌雄,张廷龙,周方聪.两次登陆海南岛的热带气旋闪电活动特征对比分析[J].气象研究与应用,2016,37(04):1.
　Wei Chang-xiong,Zhang Ting-long,Zhou Fang-cong.Comparative analysis of lightning activity characteristic in two tropical cyclones landed in Hainan Island[J].Journal of Meteorological Research and Application,2016,37(04):1.

备注/Memo

备注/Memo:
收稿日期:2019-03-03。
基金项目:防城港市科技局课题"相似台风路径及环境形势计算显示系统"（防科AC17005009）
作者简介:黄滢(1981-),女,汉族,广西钦州人,学士,高级工程师,主要从事热带气旋研究。
更新日期/Last Update: 1900-01-01