IOCAS-IR  > 海洋环流与波动重点实验室
Key Dynamical Factors Driving the Kuroshio Subsurface Water to Reach the Zhejiang Coastal Area
Xu, Lingjing1,2,3; Yang, Dezhou1,2; Benthuysen, Jessica A.4; Yin, Baoshu1,2,3
2018-12-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN2169-9275
Volume123Issue:12Pages:9061-9081
AbstractObservations indicate a seasonal variation of the Kuroshio subsurface water (KSSW) intrusion into the coastal region off the Zhejiang Province of China. The observed temperature and salinity distributions suggest a stronger intrusion in June and weaker intrusion in December. A hydrodynamic model well reproduces the seasonal variation of temperature and salinity characteristics and the current structure over the continental shelf. A passive tracer in the subsurface layer is used to investigate the movement of the KSSW. Tracer experiments confirm the seasonal variation of the KSSW intrusion, showing that the intrusion is stronger in summer and weaker in autumn and winter. Moreover, tracer concentrations suggest that in general it takes at least 1.5months for the KSSW from east of Taiwan to reach the Zhejiang coastal area. Analyses of the momentum balances indicate that the KSSW's northward movement is regulated by the geostrophic current, while the shoreward intrusion results from the bottom Ekman effect. The seasonal changes in pressure gradients and vertical eddy viscosities contribute to the KSSW intrusion into the Zhejiang coastal area in June rather than in December. Sensitivity experiments show that the seasonal variation of the KSSW intrusion is mainly induced by the different wind stresses in summer and winter. The stronger southerly monsoon, the weaker and warmer Taiwan Warm Current, and the stronger and colder Kuroshio Current are favorable to the KSSW intrusion. Plain Language Summary In this work, we focus on the key dynamical mechanisms to drive the Kuroshio subsurface water (KSSW) to reach the Zhejiang coastal area. The temperature and salinity observational data and numerical model show that there is a seasonal variation of the Kuroshio subsurface water intrusion, which is stronger in summer and weaker in autumn and winter. The KSSW intrusion is mainly induced by the different winds between summer and winter. The stronger southerly monsoon, the weaker and warmer Taiwan Warm Current, and the stronger and colder Kuroshio Current are favorable to the KSSW intrusion. This study indicates that during summer, the KSSW intrusion provides a pathway for the delivery of nutrients into the Zhejiang Province for phytoplankton growth. Thus, it will improve further understanding of the coastal marine ecosystem's response to these nutrient sources.
DOI10.1029/2018JC014219
Indexed BySCI
Language英语
Funding ProjectNSFC-Shandong Joint Fund for Marine Science Research Centers[U1406401] ; National Key Research and Development Plan Sino-Australian Centre for Healthy Coasts[2016YFE0101500] ; National Key Research, Development Program of China[2016YFC1401601] ; National Key Research, Development Program of China[2017YFC1404000] ; National Key Research, Development Program of China[2017YFA0604102] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA11020104] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA110203052] ; National Natural Science Foundation of China (NSFC)[41576023] ; National Natural Science Foundation of China (NSFC)[41876019] ; National Natural Science Foundation of China (NSFC)[41476019] ; Foundation for Innovative Research Groups of NSFC[41421005] ; Aoshan Sci-Tec Innovative Project of Qingdao National Laboratory for Marine Science and Technology[2016ASKJ02] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19060203] ; Australia China Science Research Fund[ACSRF 48162] ; Australian Government Department of Industry, Innovation and Science ; High-Performance Computing Center at the IOCAS
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000456405900023
PublisherAMER GEOPHYSICAL UNION
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Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/160701
Collection海洋环流与波动重点实验室
Corresponding AuthorYang, Dezhou
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean Dynam & Climate, Qingdao, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Australian Inst Marine Sci, Crawley, WA, Australia
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
Xu, Lingjing,Yang, Dezhou,Benthuysen, Jessica A.,et al. Key Dynamical Factors Driving the Kuroshio Subsurface Water to Reach the Zhejiang Coastal Area[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2018,123(12):9061-9081.
APA Xu, Lingjing,Yang, Dezhou,Benthuysen, Jessica A.,&Yin, Baoshu.(2018).Key Dynamical Factors Driving the Kuroshio Subsurface Water to Reach the Zhejiang Coastal Area.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,123(12),9061-9081.
MLA Xu, Lingjing,et al."Key Dynamical Factors Driving the Kuroshio Subsurface Water to Reach the Zhejiang Coastal Area".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 123.12(2018):9061-9081.
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