气候变化领域集成服务门户(CCPortal): Estimation of the Tangential Winds and Asymmetric Structures in Typhoon Inner Core Region Using Himawari-8

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DOI	10.1029/2020GL087637
	Estimation of the Tangential Winds and Asymmetric Structures in Typhoon Inner Core Region Using Himawari-8
	Tsukada T.; Horinouchi T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	Observations of the winds in tropical cyclones are still limited. We propose a new method for deriving the tangential winds in tropical cyclones, which employs a spectral analysis of high-frequency cloud imaging by latest-generation geostationary meteorological satellites such as Himawari-8. The method was applied to the visible images of boundary layer clouds in the eye of Typhoon Lan (2017) over an 8.5-hr period. The low-level tangential winds over the central two thirds of the eye in radius were close to a rigid body rotation and increased with time. On its outside was a region with striating clouds rotating at much higher angular velocities, which may have been supergradient. Asymmetric motions were visualized as the deviation from the inner rotation, and the vorticity of some mesovortices were quantified. These asymmetric motions are suggested to transport angular momentum to accelerate the inner rotation. ©2020. The Authors.
英文关键词	Boundary layers; Geostationary satellites; Hurricanes; Spectrum analysis; Storms; Tropics; Asymmetric motion; Asymmetric structures; Boundary layer clouds; Geostationary meteorological satellites; High frequency HF; Rigid body rotation; Tangential wind; Tropical cyclone; Wind; angular momentum; asymmetry; boundary layer; geostationary satellite; observational method; satellite data; satellite imagery; spectral analysis; tropical cyclone; vorticity
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170317
作者单位	Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan; Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan
推荐引用方式 GB/T 7714	Tsukada T.,Horinouchi T.. Estimation of the Tangential Winds and Asymmetric Structures in Typhoon Inner Core Region Using Himawari-8[J],2020,47(11).
APA	Tsukada T.,&Horinouchi T..(2020).Estimation of the Tangential Winds and Asymmetric Structures in Typhoon Inner Core Region Using Himawari-8.Geophysical Research Letters,47(11).
MLA	Tsukada T.,et al."Estimation of the Tangential Winds and Asymmetric Structures in Typhoon Inner Core Region Using Himawari-8".Geophysical Research Letters 47.11(2020).