气候变化领域集成服务门户(CCPortal): Internal Tide Cycle and Topographic Scattering Over the North Mid-Atlantic Ridge

CCPortal

DOI	10.1029/2020JC016376
	Internal Tide Cycle and Topographic Scattering Over the North Mid-Atlantic Ridge
	Lahaye N.; Gula J.; Roullet G.
发表日期	2020
ISSN	21699275
卷号	125 期号:12
英文摘要	Internal tides are a predominant source of high-frequency variability and diapycnal mixing in the ocean. Understanding their dynamics and lifecycle is necessary to better understand their role in the ocean circulation. In this study, we describe and quantify internal tide generation, propagation, and dissipation in a sector of the North Mid-Atlantic Ridge, using high-resolution numerical simulations with realistic bathymetry and stratification. We show that the generation and dissipation of internal tides, as well as the distribution of internal tides among vertical modes, exhibit high spatial variability. We find that topographic scattering leads to a significant transfer of energy toward high vertical modes and thereby enhances internal tide dissipation. On average, and especially on the ridge, this mechanism is dominant over the conversion from the barotropic tide for transferring energy to high ((Formula presented.) 7) vertical modes. The magnitude of the scattering of the first baroclinic internal mode is found to be in good agreement with theoretical predictions. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	energy dissipation & mixing; internal tides; internal waves; topographic scattering
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/186562
作者单位	Univ Brest, CNRS, Ifremer, IRD, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, Plouzané, France; Inria/Irmar, Campus Universitaire de Beaulieu, Rennes, France
推荐引用方式 GB/T 7714	Lahaye N.,Gula J.,Roullet G.. Internal Tide Cycle and Topographic Scattering Over the North Mid-Atlantic Ridge[J],2020,125(12).
APA	Lahaye N.,Gula J.,&Roullet G..(2020).Internal Tide Cycle and Topographic Scattering Over the North Mid-Atlantic Ridge.Journal of Geophysical Research: Oceans,125(12).
MLA	Lahaye N.,et al."Internal Tide Cycle and Topographic Scattering Over the North Mid-Atlantic Ridge".Journal of Geophysical Research: Oceans 125.12(2020).