气候变化领域集成服务门户(CCPortal): Energetics-Based Estimation of the Diapycnal Mixing Induced by Internal Tides in the Andaman Sea

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DOI	10.1029/2020JC016521
	Energetics-Based Estimation of the Diapycnal Mixing Induced by Internal Tides in the Andaman Sea
	Peng S.; Liao J.; Wang X.; Liu Z.; Liu Y.; Zhu Y.; Li B.; Khokiattiwong S.; Yu W.
发表日期	2021
ISSN	21699275
卷号	126 期号:4
英文摘要	The Andaman Sea (AS) is characterized by surprisingly weak stratification in its deep basin in drastic contrast to the nearby Bay of Bengal (BoB), presumably due to strong diapycnal mixing fertilized by the dissipation of internal tides. Here, we report on the first estimates of tidal mixing in the AS using idealized numerical simulations resolving the generation and evolution of low-mode internal tides. The estimation is based on a diagnostic analysis of the energetics of the simulated internal tides of both local and non-local origins. The results highlight the dominant role of the internal tides generated in the channels along the western boundary island chain in energizing diapycnal mixing in the entire AS. Tidal dissipation and mixing in the deep basin of the AS are found to be highly elevated, with the depth-integrated dissipation rate and the diapycnal diffusivity being O(10−2–10) W m−2 and O(10−3–10−2) m2 s−1, respectively, both of which are 1–2 orders of magnitude larger than those in the deep BoB. These model-based estimates of tidal mixing are in general consistent with those from in situ conductivity-temperature-depth (CTD) measurements using the fine-scale parameterization. Our results suggest that the oft-used tidal mixing parameterization considering only local internal tide generation would underestimate the depth-integrated tidal dissipation in the AS by several orders of magnitude, highlighting therefore the necessity of considering contributions of non-local internal tides in parameterizing tidal dissipation and mixing in marginal seas like the AS. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Andaman Sea; diapycnal diffusivity; internal tides; tidal dissipation; tidal mixing
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/186363
作者单位	State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Southern Marine Science and Engineering, Guangdong Laboratory (Guangzhou), Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China; National Supercomputer Center in Guangzhou (Sun Yat-Sen University), Guangzhou, China; Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; State Key Laboratory of Marine Environment Science, and Department of Physical Oceanography, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China; Center for Ocean and Climate Research, First Institute of Oceanology, Ministry of Natural Resources, Qingdao, China; Department of Ocean Science and Engineering, Shandong University of Science and Technology, Qingdao, China; ...
推荐引用方式 GB/T 7714	Peng S.,Liao J.,Wang X.,et al. Energetics-Based Estimation of the Diapycnal Mixing Induced by Internal Tides in the Andaman Sea[J],2021,126(4).
APA	Peng S..,Liao J..,Wang X..,Liu Z..,Liu Y..,...&Yu W..(2021).Energetics-Based Estimation of the Diapycnal Mixing Induced by Internal Tides in the Andaman Sea.Journal of Geophysical Research: Oceans,126(4).
MLA	Peng S.,et al."Energetics-Based Estimation of the Diapycnal Mixing Induced by Internal Tides in the Andaman Sea".Journal of Geophysical Research: Oceans 126.4(2021).