Regional Abyssal Vorticity Balance in the Northeast South China Sea: External and Internal Dynamics of Abyssal Circulation

doi:10.1175/JPO-D-23-0060.1

IOCAS-IR > 海洋环流与波动重点实验室

	Regional Abyssal Vorticity Balance in the Northeast South China Sea: External and Internal Dynamics of Abyssal Circulation
	Zheng, Hua 1; Zhu, Xiao-hu 2,3,4; Wang, Min 2; Chen, Juntian 2; Nan, Feng 5,6,7; Yu, Fei 5,6,7
	2024
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN	0022-3670
卷号	54 期号:1 页码:265-279
通讯作者	Zhu, Xiao-hu(xhzhu@sio.org.cn)
摘要	Abyssal vorticity balance in the northeast South China Sea was assessed for over a year based on observations from 28 current-and pressure-recording inverted echo sounders distributed west of the Luzon Strait. The regional first-order balance was dominated by the planetary vorticity flux and bottom pressure torque, which reflect the external and internal dy-namics of abyssal circulation. Vertical motion considerably contributed to the planetary vorticity flux, whereas the contribu-tion of horizontal motion was negligible. Positive and negative planetary vorticity fluxes dominate the areas along the eastern and western boundaries, indicating upward and downward vertical transport, respectively. The opposite planetary vorticity fluxes in the different areas were accompanied by different current patterns; regional anticyclonic and cyclonic characteristics appeared near the western and eastern boundaries, respectively, owing to the deep topography as the abyssal current followed the boundary. The planetary vorticity flux near the eastern boundary was substantial in spring and autumn; in contrast, along the western boundary it was enhanced only in spring. Deep eddies played important roles in planetary vorticity flux and re-gional vorticity balance. The results of this study reveal the formation dynamics of abyssal circulation in the South China Sea as well as its spatiotemporal distributions, providing a more detailed description of abyssal circulation.
关键词	Abyssal circulation Potential vorticity In situ oceanic observations
DOI	10.1175/JPO-D-23-0060.1
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41920104006] ; National Natural Science Foundation of China[41906024] ; Scientific Research Fund of Second Institute of Oceanography, MNR[JZ2001] ; Project of State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography[SOEDZZ2106] ; Project of State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography[SOEDZZ2207] ; Oceanic Interdisciplinary Program of Shanghai Jiao Tong University[SL2021MS021] ; Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)[311020004] ; Global Climate Changes and Air-sea Interaction Program[GASI-02-PAC-ST-Wwin] ; Taishan Scholars Program
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001143925900002
出版者	AMER METEOROLOGICAL SOC
WOS关键词	WORLD OCEAN ; VARIABILITY
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/184318
专题	海洋环流与波动重点实验室
通讯作者	Zhu, Xiao-hu
作者单位	1.Minist Nat Resources, Inst Polar & Ocean Technol, Inst Oceanog 2, Hangzhou, Peoples R China 2.Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China 4.Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 6.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 7.Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Hua,Zhu, Xiao-hu,Wang, Min,et al. Regional Abyssal Vorticity Balance in the Northeast South China Sea: External and Internal Dynamics of Abyssal Circulation[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2024,54(1):265-279.
APA	Zheng, Hua,Zhu, Xiao-hu,Wang, Min,Chen, Juntian,Nan, Feng,&Yu, Fei.(2024).Regional Abyssal Vorticity Balance in the Northeast South China Sea: External and Internal Dynamics of Abyssal Circulation.JOURNAL OF PHYSICAL OCEANOGRAPHY,54(1),265-279.
MLA	Zheng, Hua,et al."Regional Abyssal Vorticity Balance in the Northeast South China Sea: External and Internal Dynamics of Abyssal Circulation".JOURNAL OF PHYSICAL OCEANOGRAPHY 54.1(2024):265-279.