Variation of Internal Tides on the Continental Slope of the Southeastern East China Sea

The semidiurnal internal tides (ITs) on the continental slope of the southeastern East China Sea (ECS) exhibited abrupt enhancement in November of 2017. This enhancement resulted from the intensification of the coherent semidiurnal ITs. Coherent and incoherent semidiurnal ITs had a comparative energ...

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Main Authors: Bing Yang, Po Hu, Yijun Hou
Format: Article
Language:English
Published: MDPI AG 2022-01-01
Series:Journal of Marine Science and Engineering
Subjects:
Online Access:https://www.mdpi.com/2077-1312/10/1/104
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author Bing Yang
Po Hu
Yijun Hou
author_facet Bing Yang
Po Hu
Yijun Hou
author_sort Bing Yang
collection DOAJ
description The semidiurnal internal tides (ITs) on the continental slope of the southeastern East China Sea (ECS) exhibited abrupt enhancement in November of 2017. This enhancement resulted from the intensification of the coherent semidiurnal ITs. Coherent and incoherent semidiurnal ITs had a comparative energy contribution in October; however, coherent semidiurnal ITs dominated with a variance contribution of 90% in November. The variance contribution of vertical modes of the semidiurnal ITs varied between October and November, and the mode with most variance contribution changed from the second mode to the first mode. Altimeter data and the observed background currents indicated that the Kuroshio mainstream meandered and abruptly intruded into the ECS in November. The upper layer background currents were significantly related to the kinetic energy of the semidiurnal ITs, and the correlation coefficient between them reached 0.81. The frequent occurrences of the Kuroshio intrusion have suggested that the ITs in the ECS are susceptible to the modulation of the Kuroshio current. Numerical modeling and predication of ITs should consider the meander of the Kuroshio mainstream.
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spelling doaj.art-02e675e78a53427a87efb7b9b5fada372023-11-23T14:17:04ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-01-0110110410.3390/jmse10010104Variation of Internal Tides on the Continental Slope of the Southeastern East China SeaBing Yang0Po Hu1Yijun Hou2CAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, ChinaCAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, ChinaCAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, ChinaThe semidiurnal internal tides (ITs) on the continental slope of the southeastern East China Sea (ECS) exhibited abrupt enhancement in November of 2017. This enhancement resulted from the intensification of the coherent semidiurnal ITs. Coherent and incoherent semidiurnal ITs had a comparative energy contribution in October; however, coherent semidiurnal ITs dominated with a variance contribution of 90% in November. The variance contribution of vertical modes of the semidiurnal ITs varied between October and November, and the mode with most variance contribution changed from the second mode to the first mode. Altimeter data and the observed background currents indicated that the Kuroshio mainstream meandered and abruptly intruded into the ECS in November. The upper layer background currents were significantly related to the kinetic energy of the semidiurnal ITs, and the correlation coefficient between them reached 0.81. The frequent occurrences of the Kuroshio intrusion have suggested that the ITs in the ECS are susceptible to the modulation of the Kuroshio current. Numerical modeling and predication of ITs should consider the meander of the Kuroshio mainstream.https://www.mdpi.com/2077-1312/10/1/104internal tidesKuroshioKuroshio meanderEast China Sea
spellingShingle Bing Yang
Po Hu
Yijun Hou
Variation of Internal Tides on the Continental Slope of the Southeastern East China Sea
Journal of Marine Science and Engineering
internal tides
Kuroshio
Kuroshio meander
East China Sea
title Variation of Internal Tides on the Continental Slope of the Southeastern East China Sea
title_full Variation of Internal Tides on the Continental Slope of the Southeastern East China Sea
title_fullStr Variation of Internal Tides on the Continental Slope of the Southeastern East China Sea
title_full_unstemmed Variation of Internal Tides on the Continental Slope of the Southeastern East China Sea
title_short Variation of Internal Tides on the Continental Slope of the Southeastern East China Sea
title_sort variation of internal tides on the continental slope of the southeastern east china sea
topic internal tides
Kuroshio
Kuroshio meander
East China Sea
url https://www.mdpi.com/2077-1312/10/1/104
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