IOCAS-IR  > 海洋环流与波动重点实验室
Subsurface structure and variability of the zonal currents in the Northwestern Tropical Pacific Ocean
Song, Lina1,2; Li, Yuanlong1,3; Wang, Fan1,3,4; Wang, Jianing1,3; Liu, Chuanyu1,3
2018-11-01
Source PublicationDEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
ISSN0967-0637
Volume141Pages:11-23
Corresponding AuthorLi, Yuanlong(liyuanlong@qdio.ac.cn)
AbstractSeven subsurface moorings were deployed between 0 degrees N and 7.5 degrees N at 142 degrees E in the western Pacific during August 2014-October 2015, obtaining unprecedented high-quality measurements of the North Equatorial Countercurrent (NECC) between 60 and 200 m and the underlying Northern Subsurface Countercurrent (NSCC) and North Equatorial Subsurface Current (NESC) between 300 and 600 m. During the observation period, the eastward-flowing NSCC showed a mean velocity of 5-15 cm s(-1) between 2 degrees N and 4 degrees N, while the NESC manifested as intermittent westward currents of < 5 cm s(-1) between 4 degrees N and 6 degrees N. Temporal variabilities in the NSCC and NESC are documented for the first time. Both the NSCC and NESC were strengthened when the NECC shifted to the south in boreal fall. The 2015-2016 El Nino induced significant strengthening of the NECC and weakening of the NESC. Further analysis combining ocean reanalysis data suggests that seasonal variations are likely coherent between the upper and lower (300-600 m) layers and associated with the meridional migration of the NECC. Seasonal variations of the three currents are likely first-mode baroclinic Rossby wave responses to basin wide wind forcing. By contrast, interannual variations of the NSCC and NESC have more complicated vertical structure. El Nino events generally cause the strengthening and southward migration of the NECC and the weakening of the NESC. Ocean reanalysis products however show difficulties in realistically representing the observed subsurface structure and variability of the three currents, remarking the necessity of enhancing ocean in-situ observation systems.
KeywordNorth Equatorial Countercurrent Northern Subsurface Countercurrent North Equatorial Subsurface Current Mooring observation Seasonal and interannual variations
DOI10.1016/j.dsr.2018.09.004
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[41706018] ; Scientific and Technological Innovation Project[2016ASKJ12] ; National Program on Global Change and Air-Sea Interaction[GASI-IPOVAI-01-01] ; NSFC[41730534] ; NSFC[41776001] ; NSFC[41776022] ; NSFC[41606026] ; NSFC[41421005] ; NSFC[41330963] ; NSFC[U1406401] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA11010204] ; Qingdao National Laboratory for Marine Science and Technology[2015ASTP] ; Qingdao National Laboratory for Marine Science and Technology[2017ASKJ01] ; Qingdao National Laboratory for Marine Science and Technology[2017ASTCP-ES03] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDB-SSW-DQC030] ; National Basic Research Program of China[2012CB417401] ; Youth Program of the Thousand Talents[Y72143101B] ; Youth Program of the Thousand Talents[Y82122101L] ; AoShan Talents Program
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000451104200002
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/156152
Collection海洋环流与波动重点实验室
Corresponding AuthorLi, Yuanlong
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
2.Shandong Acad Sci, Inst Oceanog Instrumentat, Qingdao, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean Dynam & Climate, Qingdao, Peoples R China
4.Chinese Acad Sci, Ctr Ocean Mega Sci, 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
Song, Lina,Li, Yuanlong,Wang, Fan,et al. Subsurface structure and variability of the zonal currents in the Northwestern Tropical Pacific Ocean[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2018,141:11-23.
APA Song, Lina,Li, Yuanlong,Wang, Fan,Wang, Jianing,&Liu, Chuanyu.(2018).Subsurface structure and variability of the zonal currents in the Northwestern Tropical Pacific Ocean.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,141,11-23.
MLA Song, Lina,et al."Subsurface structure and variability of the zonal currents in the Northwestern Tropical Pacific Ocean".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 141(2018):11-23.
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