IOCAS-IR
Origins and Pathways of the Pacific Equatorial Undercurrent Identified by a Simulated Adjoint Tracer
Nie, Xunwei1,2,3,4; Gao, Shan3,5,6; Wang, Fan3,5,6; Chi, Jianwei4,7; Qu, Tangdong1,4
2019-04-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN2169-9275
Volume124Issue:4Pages:2331-2347
AbstractThe origins and pathways of the Pacific Equatorial Undercurrent (EUC) are investigated using a simulated adjoint tracer of the consortium Estimating the Circulation and Climate of the Ocean. The main source waters of the EUC, as well as their transit time and contributions, are identified. The zonal variability of the EUC water composition and the contributions from different pathways are also estimated. Results show that the ratio of the EUC water coming from the tropics to that from extratropics is relatively stable (1 vs. 4) along the equator, except in the western Pacific where extratropical water is more dominant. The main body of extratropical water within the EUC is transported through the western boundary pathways, while the percent transported via the interior pathways gradually increases toward the east. Tropical water merges into the EUC mainly through the tropical cells with a larger portion through the northern side of the equator. Plain Language Summary The Equatorial Undercurrent (EUC) plays an important role in modulating the equatorial Pacific thermal structure and the surface temperature in the eastern basin. Thus, it is crucial in evolution of the El Nino Southern Oscillation events. Studying the EUC source waters helps us understanding the variability of this current and hence its influence to equatorial Pacific. Previous studies revealed that the various EUC source waters distribute widely in the Pacific basin. And there are two main pathways for these waters entering the equatorial region: the western boundary pathway and the interior pathway. This work analyzed this issue more quantitatively. We identified not only the transit time and contributions of these source waters but also the zonal variability of the EUC's composition and the contributions from different pathways. Results show that the ratio of the EUC water coming from tropics to that from extratropics is stable (1 vs. 4) along the equator, except in the western Pacific where extratropical water is more dominant. The extratropical waters are mainly transported through the western boundary pathways. The contribution from the interior pathways gradually increases toward the east.
KeywordPacific Equatorial Undercurrent source water pathway transit time modeling cells
DOI10.1029/2018JC014212
Indexed BySCI
Language英语
Funding ProjectBasic Scientific Fund for National Public Research Institutes of China[2017Y04] ; SOA Program on Global Change and Air-Sea interactions[GASI-IPOVAI-03] ; National Natural Science Foundation of China[41806040] ; National Natural Science Foundation of China[41676009] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1406405] ; China Ocean Mineral Resources Research and Development Association program[DY135-E2-3-03] ; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences[LTO1701]
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000467950800004
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/157046
Collection中国科学院海洋研究所
Corresponding AuthorGao, Shan
Affiliation1.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sci & Numer Modeling, Qingdao, Shandong, Peoples R China
2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Reg Oceanog & Numer Modeling, Qingdao, Shandong, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Qingdao, Shandong, Peoples R China
4.Univ Calif Los Angeles, Joint Inst Reg Earth Syst Sci & Engn, Los Angeles, CA USA
5.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Shandong, Peoples R China
6.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Ocean Dynam & Climate, Qingdao, Shandong, Peoples R China
7.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Nie, Xunwei,Gao, Shan,Wang, Fan,et al. Origins and Pathways of the Pacific Equatorial Undercurrent Identified by a Simulated Adjoint Tracer[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2019,124(4):2331-2347.
APA Nie, Xunwei,Gao, Shan,Wang, Fan,Chi, Jianwei,&Qu, Tangdong.(2019).Origins and Pathways of the Pacific Equatorial Undercurrent Identified by a Simulated Adjoint Tracer.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,124(4),2331-2347.
MLA Nie, Xunwei,et al."Origins and Pathways of the Pacific Equatorial Undercurrent Identified by a Simulated Adjoint Tracer".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 124.4(2019):2331-2347.
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