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, Yuanlong1,2,3
2023-12-01
Source PublicationJOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN0022-3670
Volume53Issue:12Pages:2893-2912
Corresponding AuthorWang, Fan(fwang@qdio.ac.cn)
AbstractWhile 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.
KeywordPacific Ocean Eddies Oceanic profilers Anomalies
DOI10.1175/JPO-D-22-0254.1
Indexed BySCI
Language英语
Funding ProjectShan-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 Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:001122243000004
PublisherAMER METEOROLOGICAL SOC
WOS KeywordPACIFIC INTERMEDIATE WATER ; MESOSCALE EDDIES ; KINETIC-ENERGY ; SOUTH-PACIFIC ; LOOP CURRENT ; VARIABILITY ; PROPAGATION ; CIRCULATION ; OYASHIO ; INTRUSIONS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/184216
Collection海洋环流与波动重点实验室
Corresponding AuthorWang, Fan
Affiliation1.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
First Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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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