A relay of anticyclonic eddies transferring North Pacific subtropical mode water into the South China Sea

doi:10.3389/fmars.2023.1106721

IOCAS-IR > 海洋环流与波动重点实验室

	A relay of anticyclonic eddies transferring North Pacific subtropical mode water into the South China Sea
	Wang, Ran1,2 ; Ren, Qiang1,2 ; Nan, Feng 1,2,3,4; Yu, Fei 1,2,3,4
	2023-04-19
发表期刊	FRONTIERS IN MARINE SCIENCE
卷号	10 页码:17
通讯作者	Nan, Feng(nanfeng0515@qdio.ac.cn) ; Yu, Fei(yuf@qdio.ac.cn)
摘要	North Pacific subtropical mode waters (STMWs), which are subducted with airsea interaction signals and characterized by low potential vorticity (PV), play an important role in climate change issues. STMW (PV < 2 x 10 (-10) m(-1) center dot s(-1)) can be advected westward by large-scale ocean circulation and mesoscale eddies. However, whether and how the STMW intrudes into the South China Sea (SCS) remains unclear. Low PV signals that originate from the STMW and intruding into the SCS are investigated by comparing observations and ocean general circulation models during 2003-2017. These signals mostly move across the Luzon Strait (LS) into the SCS during the 2008-2009 and 2014-2016 periods. The results of case studies selected from these two periods indicate that the low PV signals can move to the LS and are trapped by anticyclonic eddies (AEs). When the velocity vorticity is negative southwest of Taiwan Island, vertical stratification becomes weaker west of the coming AE ( AE1), and low PV signals can consequently be transported along the STMW layer (25.0 sq- 25.5 sq isopycnal layer). Thus, an AE (AE2) forms east of AE1 and isolates the low PV signal from AE1, and then AE2 transports the low PV water southwestward in the SCS. In contrast, the low PV signal has difficulty migrating eastward when the velocity vorticity is positive west of AE1, as vertical stratification strengthens and then weakens that signal. The results suggest that only AEs can relay low PV signals from east of the LS and carry them over long distances in the SCS.
关键词	subtropical mode water South China Sea Luzon Strait (LS) mesoscale eddy low potential vorticity water
DOI	10.3389/fmars.2023.1106721
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42106196] ; National Natural Science Foundation of China[42206032] ; Natural Science Foundation of Shandong Province[ZR2022QD045]
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Marine & Freshwater Biology
WOS记录号	WOS:000980614400001
出版者	FRONTIERS MEDIA SA
WOS关键词	KUROSHIO INTRUSION ; LUZON STRAIT ; EDDY ; TRANSPORT ; VARIABILITY ; SUBDUCTION ; BLOCKING ; WAVE
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/183133
专题	海洋环流与波动重点实验室
通讯作者	Nan, Feng; Yu, Fei
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol, Qingdao, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
第一作者单位	海洋环流与波动重点实验室
通讯作者单位	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Wang, Ran,Ren, Qiang,Nan, Feng,et al. A relay of anticyclonic eddies transferring North Pacific subtropical mode water into the South China Sea[J]. FRONTIERS IN MARINE SCIENCE,2023,10:17.
APA	Wang, Ran,Ren, Qiang,Nan, Feng,&Yu, Fei.(2023).A relay of anticyclonic eddies transferring North Pacific subtropical mode water into the South China Sea.FRONTIERS IN MARINE SCIENCE,10,17.
MLA	Wang, Ran,et al."A relay of anticyclonic eddies transferring North Pacific subtropical mode water into the South China Sea".FRONTIERS IN MARINE SCIENCE 10(2023):17.