刘瑞雪^1,,
明杰^1,2,,
1. 南京大学大气科学学院中尺度灾害性天气教育部重点实验室, 南京 210023
2. 中国气象局-南京大学天气雷达及资料应用联合开放实验室, 南京 210023

基金项目: 国家重点研发计划（2020YFE0201900），国家自然科学基金（41575044），中央高校基本科研业务费专项资金（020714380053，020714380171），灾害天气国家重点实验室开放课题（2020LASW-A01）共同资助


详细信息

作者简介: 刘瑞雪, 女, 1996年生, 硕士, 主要从事热带气旋观测研究.E-mail: mg1928015@smail.nju.edu.cn

通讯作者: 明杰, 副教授, 主要从事热带气旋观测和数值模拟研究.E-mail: jming@nju.edu.cn

中图分类号: P445

收稿日期:2020-12-24
修回日期:2021-04-21
上线日期:2021-08-10

Comparative analysis of the characteristics of the tropical cyclone sea surface inflow angle and drag coefficient in the Atlantic and the Western Pacific oceans

LIU RuiXue^1,,
MING Jie^1,2,,
1. Key Laboratory of Mesoscale Severe Weather of Ministry of Education, School of Atmospheric Sciences, Nanjing University, Nanjing 210023, China
2. Joint Center for Atmospheric Radar Research of Centre of Modern Analysis/Nanjing University(CMA/NJU), Nanjing 210023, China


More Information

Corresponding author: MING Jie,E-mail:jming@nju.edu.cn

MSC: P445

--> Received Date: 24 December 2020
Revised Date: 21 April 2021
Available Online: 10 August 2021


摘要
摘要:本文利用大量全球定位下投式探空仪（dropsonde）资料，对15个大西洋飓风和11个西太平洋台风海域的入流角频数分布差异进行对比，探究在热带气旋不同强度和不同边界层平均风速下入流角的分布特征，分析了两个海域拖曳系数随入流角变化的趋势.结果表明，两海域在热带气旋背景下的入流角分布具有共同点：在强度更大的热带气旋里入流角的平均值更大，分布更集中，入流角在不同风速范围内均呈正态分布且差异较小；同时两海域的入流角特征也存在差异，大西洋飓风的平均入流角大于西太平洋台风，并且大西洋飓风的拖曳系数随着入流角增加而增大，而西太平洋台风的拖曳系数随入流角的增加先减小后增大.研究结果为探究热带气旋背景下入流角的作用和影响拖曳系数变化的因子提供了新的参考.
关键词: 入流角/
下投式探空仪/
热带气旋/
拖曳系数

Abstract:This study used extensive Global Positioning System (GPS) dropsondes from 15 Atlantic hurricanes and 11 Western Pacific typhoons to compare the difference of frequency distribution of inflow angle between the two basins and to investigate the characteristics of inflow angle under different storm intensity and different mean wind speed of the boundary layer during tropical cyclones. The relationship between drag coefficient and inflow angle in the two basins were also analyzed. The results show that there are some common characteristics of inflow angle during the tropical cyclones in the two basins: the inflow angle shows concentrated distribution in strong tropical cyclone with larger mean value, and they are normally distributed with little difference under different mean wind speed ranges. Furthermore, there are also some different characteristics of inflow angle between the two basins. The mean value of inflow angle from Atlantic hurricanes is larger than that from Western Pacific typhoons. Moreover, the drag coefficient from Atlantic hurricanes increases with the increased inflow angle, while the drag coefficient from the Western Pacific typhoons decreases firstly and then increases with the increased inflow angle. The results offer a new reference for exploring the effect of inflow angle and the factors affecting drag coefficient during tropical cyclones.
Key words:Inflow angle/
Dropsonde/
Tropical cyclone/
Drag coefficient



PDF全文下载地址:

http://www.geophy.cn/data/article/export-pdf?id=db87bfe1-b6d4-441d-ab3f-983fbf54697e