气候变化领域集成服务门户(CCPortal): Wave group focusing in the ocean: estimations using crest velocities and a Gaussian linear model

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DOI	10.1007/s11069-020-04279-z
	Wave group focusing in the ocean: estimations using crest velocities and a Gaussian linear model
	Platzer P.; Filipot J.-F.; Naveau P.; Tandeo P.; Yiou P.
发表日期	2020
ISSN	0921030X
起始页码	2431
结束页码	2449
卷号	104 期号:3
英文摘要	Wave group focusing gives rise to the formation of large gravity waves at the surface of the ocean, some of which are called rogue waves and represent a natural hazard for ships and offshore platforms. For safety purposes, it is crucial to predict when and where these large waves will appear and how large they will be. This work focuses on crest velocities, a quantity that is relatively easy to extract from sea surface elevation fields. It is shown that there is a direct link between crest velocity gradient and wave group linear dispersive focusing. Studying analytically the focusing of one-dimensional Gaussian wave packets under linear evolution makes it possible to derive estimates of quantities at focus, based only on crest velocity measurements. In this way, the focusing time, focusing size and focusing amplitude (relative to instantaneous amplitude) of an isolated Gaussian wave packet can be estimated. Our work is also applicable to second-order non-linear waves. Limitations due to higher-order non-linear effects are studied in numerical simulations of the non-linear Schrödinger equation. © 2020, Springer Nature B.V.
关键词	Crest velocity Focusing Ocean wave Rogue wave Schrödinger equation Wave group Wave packet
英文关键词	computer simulation; estimation method; Gaussian method; gravity wave; numerical model; ocean wave; wave propagation; wave velocity
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/205879
作者单位	France Énergies Marines, 525 Avenue Alexis de Rochon, Plouzané, 29280, France; Laboratoire des Sciences du Climat et de l’Environnement, UMR8212 CEA-CNRS-UVSQ, IPSL, U Paris-Saclay, l’Orme des Merisiers, Gif-sur-Yvette Cedex, 91191, France; Lab-STICC, UMR CNRS 6285, IMT Atlantique, Plouzané, F-29238, France; ESTIMR - Extrèmes : Statistiques, Impacts et Régionalisation, LSCE - Laboratoire des Sciences du Climat et de l’Environnement, Gif-sur-Yvette, France
推荐引用方式 GB/T 7714	Platzer P.,Filipot J.-F.,Naveau P.,et al. Wave group focusing in the ocean: estimations using crest velocities and a Gaussian linear model[J],2020,104(3).
APA	Platzer P.,Filipot J.-F.,Naveau P.,Tandeo P.,&Yiou P..(2020).Wave group focusing in the ocean: estimations using crest velocities and a Gaussian linear model.Natural Hazards,104(3).
MLA	Platzer P.,et al."Wave group focusing in the ocean: estimations using crest velocities and a Gaussian linear model".Natural Hazards 104.3(2020).