Eddy-Induced Subsurface Spiciness Anomalies in the Kuroshio Extension Region

doi:10.1175/JPO-D-22-0254.1

IOCAS-IR > 海洋环流与波动重点实验室

	Eddy-Induced Subsurface Spiciness Anomalies in the Kuroshio Extension Region
	Lv, Mingkun1,2 ; Wang, Fan1,2,3 ; Li, Yuanlong 1,2,3
	2023-12-01
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN	0022-3670
卷号	53 期号:12 页码:2893-2912
通讯作者	Wang, Fan(fwang@qdio.ac.cn)
摘要	While mesoscale eddy-induced temperature and salinity (T and S) variations at depth levels were widely reported, those on isopycnal surfaces have been largely unexplored so far. This study investigates temperature and salinity anomalies (T' and S'; dubbed "spiciness anomalies") on isopycnal surfaces induced by mesoscale eddies in the Kuroshio Extension (KET) region, with a focus on the North Pacific Intermediate Water (NPIW) layer of 26.3-26.7470. Cyclonic eddies (CEs) and anticyclonic eddies (AEs) tend to cluster on the northern and southern flanks of the KET jet, respectively. These eddies are characterized by a large radius (CEs: 61.94 km; AEs: 68.05 km), limited zonal movement, and a tendency of meridional movement (CEs: 0.35 cm s-1 southward; AEs: 0.66 cm s-1 northward). The average eddy-induced T' and S' are-0.25 degrees C (0.06 degrees C) and-0.05 psu (0.01 psu) for CEs (AEs) in the 26.3-26.7470 layer. We propose two mechanisms for the generation of subsurface spiciness anomalies, respectively, for moving eddies that travel over long distances with trapped waters and quasi-stationary meander eddies that are generated by the meanders of the KET front. The T' and S' induced by moving eddies cumulatively drive cross-front water exchanges. Meander eddies shift the position of the front and induce redistribution of properties. However, these anomalies do not contribute to heat and salt exchanges between water masses. This work provides a useful benchmark for model simulations of mesoscale isopycnal variability in subsurface waters.
关键词	Pacific Ocean Eddies Oceanic profilers Anomalies
DOI	10.1175/JPO-D-22-0254.1
收录类别	SCI
语种	英语
资助项目	Shan-dong Provincial Natural Science Foundation[LSKJ202202601] ; Laoshan Laboratory[LSKJ202202601] ; Laoshan Laboratory[ZR2023QD159] ; Shandong Provincial Natural Science Foundation[ZR2020JQ17] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB42000000] ; Shandong Natural Science Foundation Youth Program[ZR2023QD159] ; Oceanographic Data Center, IOCAS
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001122243000004
出版者	AMER METEOROLOGICAL SOC
WOS关键词	PACIFIC INTERMEDIATE WATER ; MESOSCALE EDDIES ; KINETIC-ENERGY ; SOUTH-PACIFIC ; LOOP CURRENT ; VARIABILITY ; PROPAGATION ; CIRCULATION ; OYASHIO ; INTRUSIONS
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/184216
专题	海洋环流与波动重点实验室
通讯作者	Wang, Fan
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.Laoshan Lab, Qingdao, 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	Lv, Mingkun,Wang, Fan,Li, Yuanlong. Eddy-Induced Subsurface Spiciness Anomalies in the Kuroshio Extension Region[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2023,53(12):2893-2912.
APA	Lv, Mingkun,Wang, Fan,&Li, Yuanlong.(2023).Eddy-Induced Subsurface Spiciness Anomalies in the Kuroshio Extension Region.JOURNAL OF PHYSICAL OCEANOGRAPHY,53(12),2893-2912.
MLA	Lv, Mingkun,et al."Eddy-Induced Subsurface Spiciness Anomalies in the Kuroshio Extension Region".JOURNAL OF PHYSICAL OCEANOGRAPHY 53.12(2023):2893-2912.

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