IOCAS-IR  > 海洋环流与波动重点实验室
Structure and Variability of the Kuroshio and Luzon Undercurrent Observed by a Mooring Array
Ma, Jie1,2; Hu, Shijian1,2,3,4; Hu, Dunxin1,2,3,4; Villanoy, Cesar5; Wang, Qingye1,2,3,4; Lu, Xi1,4; Yuan, Xin1,4
2022-02-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN2169-9275
Volume127Issue:2Pages:12
Corresponding AuthorHu, Shijian(sjhu@qdio.ac.cn)
AbstractThe spatial structure and variability of the western boundary currents east of Luzon Island at 18 degrees N are investigated using measurements collected by acoustic Doppler current profilers (ADCPs) from three moorings between January 2018 and May 2020. During the observation period, the southward velocity of Luzon Undercurrent (LUC) has a maximum greater than 0.04 m s-1 ${\mathrm{s}}<^>{-1}$ at about 800 m on average and instantaneously reaches a maximum speed of about 0.47 m s-1 ${\mathrm{s}}<^>{-1}$. Observations indicate that the LUC and Kuroshio have significant intraseasonal variability and the LUC is reversed occasionally. We find that the strong upper-layer anticyclonic eddy plays a key role in the weakening and reversal of LUC and that the LUC is a permanent mean undercurrent. A vertical mode decomposition analysis is employed and results show that the first two baroclinic modes explain the main vertical features of the LUC and Kuroshio at its origin. No reversal of the southward undercurrent occurs in the second baroclinic mode velocity. We conclude that the LUC variability is generally a result of the second baroclinic mode but the observed reversal of the LUC is mainly caused by the first mode.
KeywordKuroshio Luzon undercurrent mooring eddy variability
DOI10.1029/2021JC017754
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[42006002] ; National Natural Science Foundation of China[42022040] ; China Postdoctoral Science Foundation[2021T140674] ; Strategic Priority Research Program of Chinese Academy of Sciences (CAS)[XDB42010403] ; Shandong Provincial Natural Science Foundation[ZR2020JQ18] ; Key Projects of Foreign Cooperation of the Bureau of International Cooperation CAS[132B61KYSB20170005] ; Youth Innovation Promotion Association of CAS[2018240] ; CAS Interdisciplinary Innovation Team[JCTD-2020-12]
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000765614000023
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/178165
Collection海洋环流与波动重点实验室
Corresponding AuthorHu, Shijian
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
2.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China
3.Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
5.Univ Philippines Diliman, Quezon City, Philippines
First Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences;  Center for Ocean Mega-Science, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences;  Center for Ocean Mega-Science, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ma, Jie,Hu, Shijian,Hu, Dunxin,et al. Structure and Variability of the Kuroshio and Luzon Undercurrent Observed by a Mooring Array[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2022,127(2):12.
APA Ma, Jie.,Hu, Shijian.,Hu, Dunxin.,Villanoy, Cesar.,Wang, Qingye.,...&Yuan, Xin.(2022).Structure and Variability of the Kuroshio and Luzon Undercurrent Observed by a Mooring Array.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,127(2),12.
MLA Ma, Jie,et al."Structure and Variability of the Kuroshio and Luzon Undercurrent Observed by a Mooring Array".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 127.2(2022):12.
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