Nonlinear internal wave spirals in the northern East China Sea

Abstract Oceanic internal waves are known to be important to the understanding of underwater acoustics, marine biogeochemistry, submarine navigation and engineering, and the Earth’s climate. In spite of the importance and increased knowledge of their ubiquity, the wave generation is still poorly und...

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Autores principales: SungHyun Nam, Duk-jin Kim, Seung-Woo Lee, Bong Guk Kim, Ki-mook Kang, Yang-Ki Cho
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Lenguaje:EN
Publicado: Nature Portfolio 2018
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Acceso en línea:https://doaj.org/article/34391b10a67b468aa24f94fb4a5a19f8
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spelling oai:doaj.org-article:34391b10a67b468aa24f94fb4a5a19f82021-12-02T15:08:39ZNonlinear internal wave spirals in the northern East China Sea10.1038/s41598-018-21461-32045-2322https://doaj.org/article/34391b10a67b468aa24f94fb4a5a19f82018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-21461-3https://doaj.org/toc/2045-2322Abstract Oceanic internal waves are known to be important to the understanding of underwater acoustics, marine biogeochemistry, submarine navigation and engineering, and the Earth’s climate. In spite of the importance and increased knowledge of their ubiquity, the wave generation is still poorly understood in most parts of the world’s oceans. Here, we use satellite synthetic aperture radar images, in-situ observations, and numerical models to (1) show that wave energy (having relatively high amplitude) radiates from a shallow sill in the East China Sea in all directions, but with a significant time lag dependent on background conditions, (2) reveal that wave fronts are locally formed with often favorable conditions for re-initiation, and (3) demonstrate the resulting variety of wave patterns. These findings would be the case for any broad shelf having shallow sills with time-varying conditions, and therefore have significant implications on the redistribution of energy and materials in the global as well as regional ocean.SungHyun NamDuk-jin KimSeung-Woo LeeBong Guk KimKi-mook KangYang-Ki ChoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
SungHyun Nam
Duk-jin Kim
Seung-Woo Lee
Bong Guk Kim
Ki-mook Kang
Yang-Ki Cho
Nonlinear internal wave spirals in the northern East China Sea
description Abstract Oceanic internal waves are known to be important to the understanding of underwater acoustics, marine biogeochemistry, submarine navigation and engineering, and the Earth’s climate. In spite of the importance and increased knowledge of their ubiquity, the wave generation is still poorly understood in most parts of the world’s oceans. Here, we use satellite synthetic aperture radar images, in-situ observations, and numerical models to (1) show that wave energy (having relatively high amplitude) radiates from a shallow sill in the East China Sea in all directions, but with a significant time lag dependent on background conditions, (2) reveal that wave fronts are locally formed with often favorable conditions for re-initiation, and (3) demonstrate the resulting variety of wave patterns. These findings would be the case for any broad shelf having shallow sills with time-varying conditions, and therefore have significant implications on the redistribution of energy and materials in the global as well as regional ocean.
format article
author SungHyun Nam
Duk-jin Kim
Seung-Woo Lee
Bong Guk Kim
Ki-mook Kang
Yang-Ki Cho
author_facet SungHyun Nam
Duk-jin Kim
Seung-Woo Lee
Bong Guk Kim
Ki-mook Kang
Yang-Ki Cho
author_sort SungHyun Nam
title Nonlinear internal wave spirals in the northern East China Sea
title_short Nonlinear internal wave spirals in the northern East China Sea
title_full Nonlinear internal wave spirals in the northern East China Sea
title_fullStr Nonlinear internal wave spirals in the northern East China Sea
title_full_unstemmed Nonlinear internal wave spirals in the northern East China Sea
title_sort nonlinear internal wave spirals in the northern east china sea
publisher Nature Portfolio
publishDate 2018
url https://doaj.org/article/34391b10a67b468aa24f94fb4a5a19f8
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AT bonggukkim nonlinearinternalwavespiralsinthenortherneastchinasea
AT kimookkang nonlinearinternalwavespiralsinthenortherneastchinasea
AT yangkicho nonlinearinternalwavespiralsinthenortherneastchinasea
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