气候变化领域集成服务门户(CCPortal): The Three-Dimensional Internal Tide Radiation and Dissipation in the Mariana Arc-Trench System

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DOI	10.1029/2020JC016502
	The Three-Dimensional Internal Tide Radiation and Dissipation in the Mariana Arc-Trench System
	Zhao C.; Xu Z.; Robertson R.; Li Q.; Wang Y.; Yin B.
发表日期	2021
ISSN	21699275
卷号	126 期号:5
英文摘要	Internal tides are energetic in the Mariana arc, but their three-dimensional radiation and dissipation remain unexplored, particularly the trench-arc-basin impacts. Here, the generation, propagation and dissipation of M2 internal tides over the Mariana area are examined using a series of observation-supported high-resolution simulations. The M2 barotropic to baroclinic conversion rate amounts to 8.35 GW, of which two arc-shaped ridges contribute ∼81% of the generated energy. The contributions to generation by the Mariana basin and deep trench are weak. Nevertheless, they are important in modulating the energy radiation and dissipation, since tidal beams can spread to these areas. The Mariana ridges radiate the westward-focused and eastward-spreading tidal beams. This is very consistent with the altimetric measurements. The resonance in the ridge center enhances the westward converging beam, which can travel across the Palau Ridge, 800 km away. In contrast, the eastward beams propagate over a limited lateral range, but can radiate and dissipate significant energy in the deep water column, reaching even to the abyssal Mariana trench. The direct estimation from the model results reveals the dissipation's multilayer vertical profile in the entire water column, and is well consistent with the finescale parameterization estimate based on vertical strain. However, the estimate of an oft-used energy balance method, which typically assumes an exponentially decaying vertical structure function for the dissipation rate based on distance above the seafloor, is largely inconsistent with the measurements. Our findings highlight the complexity of three-dimensional radiation paths and dissipation map of internal tides in the Mariana area. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Abyssal Ocean; energy; internal tide; Mariana Arc; numerical
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/186329
作者单位	CAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology Chinese Academy of Sciences, Qingdao, China; Pilot National Laboratory for Marine Science and Technology, Qingdao, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; CAS Engineering Laboratory for Marine Ranching, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; China-Asean College of Marine Science, Xiamen University Malaysia, Sepang, Malaysia; Polar Research Institute of China, Shanghai, China
推荐引用方式 GB/T 7714	Zhao C.,Xu Z.,Robertson R.,et al. The Three-Dimensional Internal Tide Radiation and Dissipation in the Mariana Arc-Trench System[J],2021,126(5).
APA	Zhao C.,Xu Z.,Robertson R.,Li Q.,Wang Y.,&Yin B..(2021).The Three-Dimensional Internal Tide Radiation and Dissipation in the Mariana Arc-Trench System.Journal of Geophysical Research: Oceans,126(5).
MLA	Zhao C.,et al."The Three-Dimensional Internal Tide Radiation and Dissipation in the Mariana Arc-Trench System".Journal of Geophysical Research: Oceans 126.5(2021).