气候变化领域集成服务门户(CCPortal): On the Unsteady Steepening of Short Gravity Waves Near the Crests of Longer Waves in the Absence of Generation or Dissipation

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DOI	10.1029/2020JC016735
	On the Unsteady Steepening of Short Gravity Waves Near the Crests of Longer Waves in the Absence of Generation or Dissipation
	Peureux C.; Ardhuin F.; Guimarães P.V.
发表日期	2021
ISSN	21699275
卷号	126 期号:1
英文摘要	The wave action equation provides a general framework that has been applied to the conservative hydrodynamic interactions between short and long surface waves. So far, only a limited range of solutions have been investigated. Here, we show that the wave action equation predicts that groups of short waves propagating over long monochromatic waves are unstable. We demonstrate theoretically and numerically, a new ratchet-type instability that progressively condenses short wave action around the long wave crests due to the correlation of phase speed and action fluctuations. This instability is of particular interest because it may lead to a higher probability of breaking for short waves propagating in directions within ±35 degrees of the dominant waves direction. This preferred breaking could has a strong impact on cross- and down-wind slope statistics and thus air-sea exchanges and remote sensing. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	instability; modulation; wind waves
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/186524
作者单位	Laboratoire d'Océanographie Physique et Spatiale, University Brest, CNRS, Ifremer, IRD, Brest, France; LHEEA Lab UMR6598, École Centrale de Nantes, Nantes, France; Now at France Energies Marines, Bretagne, France
推荐引用方式 GB/T 7714	Peureux C.,Ardhuin F.,Guimarães P.V.. On the Unsteady Steepening of Short Gravity Waves Near the Crests of Longer Waves in the Absence of Generation or Dissipation[J],2021,126(1).
APA	Peureux C.,Ardhuin F.,&Guimarães P.V..(2021).On the Unsteady Steepening of Short Gravity Waves Near the Crests of Longer Waves in the Absence of Generation or Dissipation.Journal of Geophysical Research: Oceans,126(1).
MLA	Peureux C.,et al."On the Unsteady Steepening of Short Gravity Waves Near the Crests of Longer Waves in the Absence of Generation or Dissipation".Journal of Geophysical Research: Oceans 126.1(2021).