气候变化领域集成服务门户(CCPortal): Microstructure and Mooring Observations of Enhanced Mixing in the Kerama Gap

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DOI	10.1029/2019JC015553
	Microstructure and Mooring Observations of Enhanced Mixing in the Kerama Gap
	Inoue R.; Tanaka T.; Nakamura H.; Yanagimoto D.; Fujio S.; Yasuda I.
发表日期	2020
ISSN	21699275
卷号	125 期号:8
英文摘要	Microstructure and mooring observations were conducted around the Kerama Gap, near the midpoint of the Ryukyu Island chain, in December 2016. We observed enhanced mixing near raised seafloor topography with vertical diffusivity from 10−2 to 10−1 m2 s−1 in the bottom water and found that tides were important drivers of enhanced mixing above sills. Two-dimensional numerical simulations of a vertical cross section of the Kerama Gap indicated that breaking internal tides play an important role in the enhanced mixing behind the sill near the entrance to the gap. In addition, M2 internal tides radiating from the sills at the gap's entrance and exit may correspond to the observed enhanced vertical shear and mixing around the salinity minimum layer of the North Pacific Intermediate Water (NPIW) in the Kerama Gap. Simple quantitative arguments based on the observed turbulence data suggest that the enhanced mixing at the sill may influence the renewal of the bottom water and the NPIW in the Okinawa Trough, about 10% of required fluxes in the Kerama Gap estimated in past studies, indicating its importance on the distributions of water masses and water properties in the North Pacific. ©2020. American Geophysical Union. All Rights Reserved.
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/186718
作者单位	Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan; Tohoku National Fisheries Research Institute, Japan Fisheries Research and Education Agency, Shiogama, Japan; Faculty of Fisheries, Kagoshima University, Kagoshima, Japan; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
推荐引用方式 GB/T 7714	Inoue R.,Tanaka T.,Nakamura H.,et al. Microstructure and Mooring Observations of Enhanced Mixing in the Kerama Gap[J],2020,125(8).
APA	Inoue R.,Tanaka T.,Nakamura H.,Yanagimoto D.,Fujio S.,&Yasuda I..(2020).Microstructure and Mooring Observations of Enhanced Mixing in the Kerama Gap.Journal of Geophysical Research: Oceans,125(8).
MLA	Inoue R.,et al."Microstructure and Mooring Observations of Enhanced Mixing in the Kerama Gap".Journal of Geophysical Research: Oceans 125.8(2020).