[1]李华实,廖胜石,李露芳,等.1409超强台风“威马逊”近海急剧加强特征及成因分析[J].气象研究与应用,2016,37(01):47-51.
　Li Huashi,Liao Shengshi,Li Lufang,et al.Characteristics and Cause Analysis of Super Typhoon (NO. 1409) “Rammasun” Rapid Strengthening in Offshore Area[J].Journal of Meteorological Research and Application,2016,37(01):47-51.
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1409超强台风“威马逊”近海急剧加强特征及成因分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第37卷
期数:
2016年01期
页码:
47-51
栏目:
天气气候
出版日期:
2016-12-20

文章信息/Info

Title:
Characteristics and Cause Analysis of Super Typhoon (NO. 1409) “Rammasun” Rapid Strengthening in Offshore Area
作者:
李华实1;  廖胜石1;  李露芳2;  潘一铭3;  农明哲1
1. 崇左市气象局, 广西崇左 532200;
2. 鹿寨县气象局, 广西柳州 450223;
3. 上思县气象局, 广西防城港 535500
Author(s):
Li Huashi1;  Liao Shengshi1;  Li Lufang2;  Pan Yiming3;  Nong mingzhe1
1. Chongzuo Municipal Meteorological Service, Chongzuo Guangxi 532200;
2. Luzhai County Meteorological Service, Liuzhou Guangxi 450223;
3. Shangsi County Meteorological Service, Fangchenggang Guangxi 535500
关键词:
近海急剧加强; 副高; 动力和水汽条件; 不稳定条件
Keywords:
rapid strengthening in offshore area; subtropical high; dynamic and moisture conditions; unstable condition
分类号:
P458.1+24
摘要:
运用实况资料、NCEP/NCAR六小时再分析资料以及2014年CMA热带气旋最佳路径数据集,对1409号超强台风"威马逊"近海急剧加强的特征及成因进行探讨分析,结果表明:高空华北槽东移,引导地面冷空气南下,副高西退略北抬,与"威马逊"形成了"东高西低"和"北高南低"的形势,增大两者间梯度,使"威马逊"强度加强;近海急剧加强24h内,台风暖心对称化结构加强,强暖中心往高低层扩展,低层偏南暖湿气流输送持续加强,对流层上层辐散不断增强,台风高层环流的西侧和北侧亦是辐散的大值区,台风西行北上的过程中利于其强辐散的维持和加强;台风中心正涡度柱急剧增大,并向对流层上层扩展,配合弱的垂直切变,利于台风的急剧加强;另外,物理量的分析也表明,"威马逊"近海急剧加强前24h内,台风环流附近大气层结不稳定度有增大的趋势。
Abstract:
Based on the conventional observation data, NCEP/NCAR reanalysis data and the CMA data of best tropical cyclone path of 2014, the characteristics and mechanism of rapid strengthening in offshore area of super typhoon "Rammasun" were analyzed. The results show that:the high-altitude North China trough moving to eastward, which led to southward invasion of cold air, and the subtropical high backing ward east and slightly moving to northward formed the pattern of pressure with typhoon "Rammasun", like:"high-east-and-low-west" and "high-north-and-low-south", which enlarge the gradient and strengthen the typhoon; within the 24h of rapid strengthening in offshore area, the symmetrical structure of typhoon warm center was strengthened and the powerful warm center expanded. the transportation of low-level southward jet sustained, the divergence in upper layer of troposphere continuously enhanced, in addition, the the high-level circulation of typhoon on both west and north side are wide area of divergence, the process of typhoon moving westward to north was in favor of maintaining and strengthen the strong divergence. The positive vorticity column of typhoon center increased rapidly and extended to the upper-level troposphere matched with weak vertical shear, which is beneficial to the rapid strengthen of typhoon. Furthermore, the analysis of physical quantities also show that during the 24 h before the rapid strengthen of "Rammasun" in offshore area, the instability of atmospheric stratification around typhoon circulation tended to increase.

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备注/Memo

备注/Memo:
收稿日期:2015-11-18。
基金项目:中国气象局预报员专项(CMAYBY2015-055)
作者简介:李华实(1990-),男,广西永福人,理学学士,助理工程师,主要从事中短期天气预报工作。
更新日期/Last Update: 1900-01-01