Diurnal Variations in Contraction of the Radius of Maximum Tangential Wind in Tropical Cyclones

被引：8

作者：

Wu, Qiaoyan ^{[1
,2
]}

Hong, Jiacheng ^{[1
,2
]}

机构：

[1] Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai, Peoples R China

来源：

GEOPHYSICAL RESEARCH LETTERS | 2022年 / 49卷 / 03期

基金：

中国国家自然科学基金;

关键词：

tropical cyclone; radius of maximum wind; diurnal variation; RAPID INTENSIFICATION; NORTH-ATLANTIC; INTENSITY; VORTICES;

D O I：

10.1029/2021GL096048

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Diurnal variations in contraction of the radius of maximum tangential wind (RMW) of tropical cyclones (TCs) were assessed using best-track data for 2001-2018. For RMW contractions before TC intensification, the largest RMW contraction rate in 6 hr at 0300-0900 local solar time (LST) was associated with the maximum coverage of very deep convective clouds with infrared brightness temperatures <208 K at 0300-0600 LST, which were found mostly outside the mean RMW. The maximum RMW contraction rate and maximum intensification rate occurred simultaneously in 6 hr at 0300-0900 LST for rapidly intensifying storms associated with the greatest coverage of very deep convective cloud at 0300-0600 LST at storm center. This was not the case for nonrapidly intensifying storms. The time-dependence of RMW contraction indicates the importance of radiative forcing on TC structure.

引用

页数：7

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