Modulation of Internal Tides by Turbulent Mixing in the South China Sea

Modulations of internal tides (ITs) including the baroclinic tidal energy budget, the incoherency, and the nonlinear interactions among different tidal components by turbulent mixing in the South China Sea (SCS) are investigated through numerical simulations. The baroclinic tidal energy budget can h...

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Autores principales:	Bingtian Li, Libin Du, Shiqiu Peng, Yibo Yuan, Xiangqian Meng, Xianqing Lv
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	internal tides turbulent mixing incoherency of internal tides non-linear interactions the South China Sea Science Q General. Including nature conservation, geographical distribution QH1-199.5
Acceso en línea:	https://doaj.org/article/2420e8246d054cd3977c9294ad6b25e3
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id	oai:doaj.org-article:2420e8246d054cd3977c9294ad6b25e3
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spelling	oai:doaj.org-article:2420e8246d054cd3977c9294ad6b25e32021-11-19T07:30:04ZModulation of Internal Tides by Turbulent Mixing in the South China Sea2296-774510.3389/fmars.2021.772979https://doaj.org/article/2420e8246d054cd3977c9294ad6b25e32021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmars.2021.772979/fullhttps://doaj.org/toc/2296-7745Modulations of internal tides (ITs) including the baroclinic tidal energy budget, the incoherency, and the nonlinear interactions among different tidal components by turbulent mixing in the South China Sea (SCS) are investigated through numerical simulations. The baroclinic tidal energy budget can hardly be affected by the structure of mixing. Meanwhile, change in the mixing intensity in a reasonable range also cannot obviously modulate the baroclinic tidal energy budget in the SCS. Compared to the baroclinic energy budget, the distributions of conversion and dissipation are more sensitive to the change of mixing. Turbulent mixing also modulates the incoherency of ITs by changing the horizontal density in the ocean. The horizontal variation of density adds incoherence to ITs largely by affecting the internal tidal amplitudes. Furthermore, nonlinear interactions among different components of ITs are generally modulated by the mixing intensity, whereas the variation of the mixing structure can hardly influence the nonlinear interactions. Therefore, the diapycnal diffusivity can set to be horizontally and vertically homogeneous in most of the internal tidal simulations, except for those in which the incoherency of ITs needs to be simulated. However, excessive strong mixing will destroy the stratification. Thus, the optimum range for IT simulations in the SCS is from O (10–5) to O (10–3) m2s–1.Bingtian LiLibin DuShiqiu PengShiqiu PengShiqiu PengYibo YuanXiangqian MengXianqing LvXianqing LvFrontiers Media S.A.articleinternal tidesturbulent mixingincoherency of internal tidesnon-linear interactionsthe South China SeaScienceQGeneral. Including nature conservation, geographical distributionQH1-199.5ENFrontiers in Marine Science, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	internal tides turbulent mixing incoherency of internal tides non-linear interactions the South China Sea Science Q General. Including nature conservation, geographical distribution QH1-199.5
spellingShingle	internal tides turbulent mixing incoherency of internal tides non-linear interactions the South China Sea Science Q General. Including nature conservation, geographical distribution QH1-199.5 Bingtian Li Libin Du Shiqiu Peng Shiqiu Peng Shiqiu Peng Yibo Yuan Xiangqian Meng Xianqing Lv Xianqing Lv Modulation of Internal Tides by Turbulent Mixing in the South China Sea
description	Modulations of internal tides (ITs) including the baroclinic tidal energy budget, the incoherency, and the nonlinear interactions among different tidal components by turbulent mixing in the South China Sea (SCS) are investigated through numerical simulations. The baroclinic tidal energy budget can hardly be affected by the structure of mixing. Meanwhile, change in the mixing intensity in a reasonable range also cannot obviously modulate the baroclinic tidal energy budget in the SCS. Compared to the baroclinic energy budget, the distributions of conversion and dissipation are more sensitive to the change of mixing. Turbulent mixing also modulates the incoherency of ITs by changing the horizontal density in the ocean. The horizontal variation of density adds incoherence to ITs largely by affecting the internal tidal amplitudes. Furthermore, nonlinear interactions among different components of ITs are generally modulated by the mixing intensity, whereas the variation of the mixing structure can hardly influence the nonlinear interactions. Therefore, the diapycnal diffusivity can set to be horizontally and vertically homogeneous in most of the internal tidal simulations, except for those in which the incoherency of ITs needs to be simulated. However, excessive strong mixing will destroy the stratification. Thus, the optimum range for IT simulations in the SCS is from O (10–5) to O (10–3) m2s–1.
format	article
author	Bingtian Li Libin Du Shiqiu Peng Shiqiu Peng Shiqiu Peng Yibo Yuan Xiangqian Meng Xianqing Lv Xianqing Lv
author_facet	Bingtian Li Libin Du Shiqiu Peng Shiqiu Peng Shiqiu Peng Yibo Yuan Xiangqian Meng Xianqing Lv Xianqing Lv
author_sort	Bingtian Li
title	Modulation of Internal Tides by Turbulent Mixing in the South China Sea
title_short	Modulation of Internal Tides by Turbulent Mixing in the South China Sea
title_full	Modulation of Internal Tides by Turbulent Mixing in the South China Sea
title_fullStr	Modulation of Internal Tides by Turbulent Mixing in the South China Sea
title_full_unstemmed	Modulation of Internal Tides by Turbulent Mixing in the South China Sea
title_sort	modulation of internal tides by turbulent mixing in the south china sea
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/2420e8246d054cd3977c9294ad6b25e3
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Modulation of Internal Tides by Turbulent Mixing in the South China Sea

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