Eddy-Induced Subsurface Spiciness Anomalies in the Kuroshio Extension Region

doi:10.1175/JPO-D-22-0254.1

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Eddy-Induced Subsurface Spiciness Anomalies in the Kuroshio Extension Region
	Lv, Mingkun 1,3; Wang, Fan 1,2,3; Li, Yuanlong 1,2,3
刊名	JOURNAL OF PHYSICAL OCEANOGRAPHY
	2023-12-01
卷号	53 期号:12 页码:2893-2912
关键词	Pacific Ocean Eddies Oceanic profilers Anomalies
ISSN号	0022-3670
DOI	10.1175/JPO-D-22-0254.1
通讯作者	Wang, Fan(fwang@qdio.ac.cn)
英文摘要	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.
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关键词	PACIFIC INTERMEDIATE WATER ; MESOSCALE EDDIES ; KINETIC-ENERGY ; SOUTH-PACIFIC ; LOOP CURRENT ; VARIABILITY ; PROPAGATION ; CIRCULATION ; OYASHIO ; INTRUSIONS
WOS研究方向	Oceanography
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:001122243000004
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/184215]
专题	海洋研究所_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.Laoshan Lab, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China
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.