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DOI	10.1029/2020JC016097
	Strength and Spatial Structure of the Perturbation Induced by a Tropical Cyclone to the Underlying Eddies
	Lu Z.; Wang G.; Shang X.
发表日期	2020
ISSN	21699275
卷号	125 期号:5
英文摘要	A tropical cyclone (TC) induces the oceanic geostrophic response, which perturbs the underlying ocean eddy field. This study investigates the strength and spatial structure of isopycnal undulations and potential vorticity (PV) changes linked with the geostrophic response by use of a linear, two-layer theory and an OGCM. It is found that the strength and cross-track length scale of the geostrophic response are well compared with those of background eddies, highlighting the ability of a TC to perturb underlying ocean eddies. More importantly, the TC-induced PV perturbation is confined within the thermocline between 100 and 300 m depth, causing the 3D quasi-geostrophic evolution of the perturbed eddies. The length scale of upwelling perturbation (which is ~130 km) is larger than that of PV response (~50 km). This scale disparity means that the patterns of the TC-induced perturbations are subject to eddy-TC separation distance. Consequently, the perturbation of a TC to an eddy is significant (negligible) when the eddy-TC separation distance is less than 80 km (larger than 200 km). This study provides a starting point for understanding the TC-induced 3D evolution of the perturbed ocean eddy field. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	eddy; geostrophic response; spatial structure; tropical cyclone
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186861
作者单位	State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China; Institution of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, China; Department of Atmospheric and Oceanic Sciences and Institute of Atmospheric Sciences, Fudan University, Shanghai, China; CMA-FDU Joint Laboratory of Marine Meteorology, Fudan University, Shanghai, China
推荐引用方式 GB/T 7714	Lu Z.,Wang G.,Shang X.. Strength and Spatial Structure of the Perturbation Induced by a Tropical Cyclone to the Underlying Eddies[J],2020,125(5).
APA	Lu Z.,Wang G.,&Shang X..(2020).Strength and Spatial Structure of the Perturbation Induced by a Tropical Cyclone to the Underlying Eddies.Journal of Geophysical Research: Oceans,125(5).
MLA	Lu Z.,et al."Strength and Spatial Structure of the Perturbation Induced by a Tropical Cyclone to the Underlying Eddies".Journal of Geophysical Research: Oceans 125.5(2020).