On the relationship between tropical cyclone size and environmental helicity in the South China Sea

被引：0
|
作者：
Min Li [1 ,2 ]
Kekuan Chu [1 ,2 ]
Jian-Feng Gu [3 ]
Zhe-Min Tan [1 ,2 ]
机构：
[1] School of Atmospheric Sciences, Nanjing University
[2] Key Laboratory of Mesoscale Severe Weather/Ministry of Education, Nanjing University
[3] Department of Meteorology, University of Reading
来源：
Atmospheric and Oceanic Science Letters | 2022年 / 15卷 / 04期
基金：
中国国家自然科学基金;
关键词：
热带气旋; 热带气旋外围尺度; 螺旋度; 绝对角动量;
D O I：
暂无
中图分类号：
P732.3 [海洋热带气象];
学科分类号：
0706 ; 070601 ;
摘要：
本文利用2001–2019年间的ERA5再分析数据集和热带气旋(TC)最佳路径观测,分析了中国南海TC的外围尺度与环境变量之间的关系.研究发现,低层环境螺旋度与TC外围尺度具有显著的正相关.大的环境螺旋度有利于TC外围对流的增强和组织化,与之对应的径向入流和角动量输送有利于TC外围尺度的维持或扩张.此外,螺旋度的非对称分布与TC外围尺度的非对称性结构也密切相关.环境螺旋度作为一个包含TC外围对流强度和组织化程度等信息的综合动力因子,为理解TC外围尺度变化提供了不同的视角.
引用
收藏
页码：34 / 39
页数：6
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