Mooring observed intraseasonal oscillations in the central South China Sea during summer monsoon season

Abstract The South China Sea (SCS) is a high biodiversity region in the world ocean, supports abundant marine resources to the peripheral nations, and affects weather/climate in southeast Asia. A better understanding of its circulation is important to better prediction and management of the SCS. Her...

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Autores principales:	Sen Jan, Ming-Huei Chang, Yiing Jang Yang, Chung-Hsiung Sui, Yu-Hsin Cheng, Yu-Yu Yeh, Chung-Wei Lee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f2a0d8aee38949268aba5c92b45ee546
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spelling	oai:doaj.org-article:f2a0d8aee38949268aba5c92b45ee5462021-12-02T18:18:32ZMooring observed intraseasonal oscillations in the central South China Sea during summer monsoon season10.1038/s41598-021-93219-32045-2322https://doaj.org/article/f2a0d8aee38949268aba5c92b45ee5462021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93219-3https://doaj.org/toc/2045-2322Abstract The South China Sea (SCS) is a high biodiversity region in the world ocean, supports abundant marine resources to the peripheral nations, and affects weather/climate in southeast Asia. A better understanding of its circulation is important to better prediction and management of the SCS. Here we reveal sizable intraseasonal oscillations at period ~ 50 days between May and November 2017 in the acoustic Doppler current profiler observed velocity in the central SCS. Satellite observed wind and sea level data together with a process-oriented numerical experiment suggest that the oscillations were caused by locally-generated and remotely-penetrated westward-propagating Rossby waves. The summer southwesterly monsoon strengthening/weakening and the resultant Ekman pumping velocity and shoreward Ekman transport increase/decrease and consequent coastal sea level rise/fall off the west coast of Palawan create westward-propagating Rossby waves causing velocity oscillations in the central SCS. Besides the local generation, Rossby waves with sea level anomaly > 0.2 m propagating from the Pacific through the Sulu Sea into the SCS could contribute to the intraseasonal velocity oscillations in the central SCS.Sen JanMing-Huei ChangYiing Jang YangChung-Hsiung SuiYu-Hsin ChengYu-Yu YehChung-Wei LeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sen Jan Ming-Huei Chang Yiing Jang Yang Chung-Hsiung Sui Yu-Hsin Cheng Yu-Yu Yeh Chung-Wei Lee Mooring observed intraseasonal oscillations in the central South China Sea during summer monsoon season
description	Abstract The South China Sea (SCS) is a high biodiversity region in the world ocean, supports abundant marine resources to the peripheral nations, and affects weather/climate in southeast Asia. A better understanding of its circulation is important to better prediction and management of the SCS. Here we reveal sizable intraseasonal oscillations at period ~ 50 days between May and November 2017 in the acoustic Doppler current profiler observed velocity in the central SCS. Satellite observed wind and sea level data together with a process-oriented numerical experiment suggest that the oscillations were caused by locally-generated and remotely-penetrated westward-propagating Rossby waves. The summer southwesterly monsoon strengthening/weakening and the resultant Ekman pumping velocity and shoreward Ekman transport increase/decrease and consequent coastal sea level rise/fall off the west coast of Palawan create westward-propagating Rossby waves causing velocity oscillations in the central SCS. Besides the local generation, Rossby waves with sea level anomaly > 0.2 m propagating from the Pacific through the Sulu Sea into the SCS could contribute to the intraseasonal velocity oscillations in the central SCS.
format	article
author	Sen Jan Ming-Huei Chang Yiing Jang Yang Chung-Hsiung Sui Yu-Hsin Cheng Yu-Yu Yeh Chung-Wei Lee
author_facet	Sen Jan Ming-Huei Chang Yiing Jang Yang Chung-Hsiung Sui Yu-Hsin Cheng Yu-Yu Yeh Chung-Wei Lee
author_sort	Sen Jan
title	Mooring observed intraseasonal oscillations in the central South China Sea during summer monsoon season
title_short	Mooring observed intraseasonal oscillations in the central South China Sea during summer monsoon season
title_full	Mooring observed intraseasonal oscillations in the central South China Sea during summer monsoon season
title_fullStr	Mooring observed intraseasonal oscillations in the central South China Sea during summer monsoon season
title_full_unstemmed	Mooring observed intraseasonal oscillations in the central South China Sea during summer monsoon season
title_sort	mooring observed intraseasonal oscillations in the central south china sea during summer monsoon season
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f2a0d8aee38949268aba5c92b45ee546
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Mooring observed intraseasonal oscillations in the central South China Sea during summer monsoon season

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