气候变化领域集成服务门户(CCPortal): Inner-Core Wind Field in a Concentric Eyewall Replacement of Typhoon Trami (2018): A Quantitative Analysis Based on the Himawari-8 Satellite

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DOI	10.1029/2020JD034434
	Inner-Core Wind Field in a Concentric Eyewall Replacement of Typhoon Trami (2018): A Quantitative Analysis Based on the Himawari-8 Satellite
	Tsujino S.; Horinouchi T.; Tsukada T.; Kuo H.-C.; Yamada H.; Tsuboki K.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	Dynamics of rapid changes of intensity and structure in an eyewall replacement cycle of tropical cyclones remain an open question. To clarify the dynamics of the inner eyewall decaying, a quantitative estimation of inner-core wind fields based on highly frequent observation images with 2.5-min temporal resolution in the Himawari-8 satellite is applied to Typhoon Trami (2018) which had a clear concentric eyewall structure. A high tangential wind of 50 m s−1 is estimated at a radius of 30 km, which is located in the inner edge of the inner eyewall, during an active stage of the inner eyewall. During the decaying stage of the inner eyewall, the estimated tangential wind rapidly decreases to about 20 m s−1 at a radius of 24 km. The satellite-based tangential winds are validated with dropsondes around the inner core by an aircraft. Vorticity field retrieved by the satellite-based tangential winds during the decaying stage exhibits a rapid decrease in an outer part of the eye and the inner eyewall, and a slow decrease near the storm center. Examination on an absolute angular momentum coordinate indicates that the rapidly slow-down rotation in the outer edge of the eye and inner eyewall is faster than a slow-down rotation explained by surface friction. It suggests that asymmetric eddies transport angular momentum across the moat in the inner eyewall dissipation. This study is the first examination of dynamical contributions of asymmetric eddies to the inner-eyewall dissipation based on satellite-estimated tangential winds. © 2021. The Authors.
英文关键词	Geostationary satellite; Tropical cyclone; Typhoon/Hurricane
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185340
作者单位	Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan; Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan; Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan; Faculty of Science, University of the Ryukyus, Nishihara, Japan; Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan
推荐引用方式 GB/T 7714	Tsujino S.,Horinouchi T.,Tsukada T.,et al. Inner-Core Wind Field in a Concentric Eyewall Replacement of Typhoon Trami (2018): A Quantitative Analysis Based on the Himawari-8 Satellite[J],2021,126(7).
APA	Tsujino S.,Horinouchi T.,Tsukada T.,Kuo H.-C.,Yamada H.,&Tsuboki K..(2021).Inner-Core Wind Field in a Concentric Eyewall Replacement of Typhoon Trami (2018): A Quantitative Analysis Based on the Himawari-8 Satellite.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Tsujino S.,et al."Inner-Core Wind Field in a Concentric Eyewall Replacement of Typhoon Trami (2018): A Quantitative Analysis Based on the Himawari-8 Satellite".Journal of Geophysical Research: Atmospheres 126.7(2021).