IOCAS-IR  > 海洋环流与波动重点实验室
Stronger Intraseasonal Variability Observed Below the Seasonal Thermocline in the Kuroshio East of Taiwan During 2014 and 2015
Wang, Qingye1,2,3; Yuan, Xin1,3,4; Hu, Dunxin1,2,3; Sasaki, Hideharu5
2021-07-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN2169-9275
Volume126Issue:7Pages:21
Corresponding AuthorWang, Qingye(wangqy@qdio.ac.cn)
AbstractIntraseasonal variability in the Kuroshio east of Taiwan was studied using moored observations at 23 degrees N, 122 degrees E from November 17, 2014 to September 5, 2015, high-resolution ocean model data, and altimetry data. It is found for the first time that the observed meridional velocity has a peak signal at 50-60 days with a significant maximum variation at 200-600 m depth. Model outputs show that the 50-60-day variability at the mooring station is related to meandering of the Kuroshio at 23 degrees N. Both surface eddies, which can extend downward to similar to 1,000 m depth, and coastal cold water upwelling associated with cyclonic eddies from deep layers can greatly change the isopycnal slope below similar to 200 m depth at 23 degrees N, 122 degrees E, and their joint effect results in the maximum variation at 200-600 m depth. Ocean eddies southeast of Taiwan propagate northward along the current axis of the Kuroshio and have a large impact on intraseasonal variability. Case analysis indicates that the formation of ocean eddies or upwelling near the coast may be related to the Ludao and Lanyu islands southeast of Taiwan or Kuroshio transport along the southern tip of Taiwan. In addition, the evolution of subsurface meridional velocity from mooring observations is inconsistent with that of the surface but is closely related to the evolution of local temperature below the seasonal thermocline. The maximum intraseasonal variability below the seasonal thermocline highlights the complex dynamics in the Kuroshio east of Taiwan.
DOI10.1029/2021JC017194
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41976011] ; National Key Research and Development Program of China[2017YFA0604102]
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000681412200031
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/175942
Collection海洋环流与波动重点实验室
Corresponding AuthorWang, Qingye
Affiliation1.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao, Peoples R China
2.Pilot Natl Lab Marine Sci Technol Qingdao, Qingdao, Peoples R China
3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
5.Japan Agcy Marine Earth Sci & Technol, Applicat Lab, Yokohama, Kanagawa, Japan
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
Wang, Qingye,Yuan, Xin,Hu, Dunxin,et al. Stronger Intraseasonal Variability Observed Below the Seasonal Thermocline in the Kuroshio East of Taiwan During 2014 and 2015[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2021,126(7):21.
APA Wang, Qingye,Yuan, Xin,Hu, Dunxin,&Sasaki, Hideharu.(2021).Stronger Intraseasonal Variability Observed Below the Seasonal Thermocline in the Kuroshio East of Taiwan During 2014 and 2015.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,126(7),21.
MLA Wang, Qingye,et al."Stronger Intraseasonal Variability Observed Below the Seasonal Thermocline in the Kuroshio East of Taiwan During 2014 and 2015".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 126.7(2021):21.
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