IOCAS-IR  > 海洋环流与波动重点实验室
Topographic Beta Spiral and Onshore Intrusion of the Kuroshio Current
Yang, De-Zhou1,2; Huang, Rui Xin3; Yin, Bao-shu1,2,4; Feng, Xing-Ru1; Chen, Hai-ying1; Qi, Ji-Feng1; Xu, Ling-jing1,4; Shi, Yun-long1,5; Cui, Xuan1,4; Gao, Guan-Dong1; Benthuysen, Jessica A.6
2018-01-16
Source PublicationGEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
Volume45Issue:1Pages:287-296
Corresponding AuthorYin, Bao-shu(bsyin@qdio.ac.cn)
AbstractThe Kuroshio intrusion plays a vitally important role in carrying nutrients to marginal seas. However, the key mechanism leading to the Kuroshio intrusion remains unclear. In this study we postulate a mechanism: when the Kuroshio runs onto steep topography northeast of Taiwan, the strong inertia gives rise to upwelling over topography, leading to a left-hand spiral in the stratified ocean. This is called the topographic beta spiral, which is a major player regulating the Kuroshio intrusion; this spiral can be inferred from hydrographic surveys. In the world oceans, the topographic beta spirals can be induced by upwelling generated by strong currents running onto steep topography. This is a vital mechanism regulating onshore intruding flow and the cross-shelf transport of energy and nutrients from the Kuroshio Current to the East China Sea. This topographic beta spiral reveals a long-term missing link between the oceanic general circulation theory and shelf dynamic theory. Plain Language Summary The water and material exchange between global ocean and marginal sea is attracting immense research interest because it significantly influences the coastal hydrodynamic environment and ecosystem. We first report the topographic beta spiral inferred from observations, which is generated by strong upwelling induced when strong western boundary current runs onto steep topography in coastal sea. We postulate that this mechanism plays a vital role in regulating intrusion/bifurcation of western boundary currents. This mechanism may be at work in many places in the world oceans; thus, it can be used as a clue in predicting the intrusion path and the bifurcation pattern of strong boundary currents. Similar to Ekman spiral, topographic beta spiral is one kind of very important and common spirals in the world oceans. In some cases, topographic beta spiral suggests that the intruding water mass originates from the deep water of western boundary current rather than surface water. Since temperature, oxygen and nutrients in the deep water are significantly different to the shelf water, this intruding water can influence coastal ecosystem and hypoxia.
DOI10.1002/2017GL076614
Indexed BySCI
Language英语
Funding ProjectStrategic 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)[41376030] ; National Natural Science Foundation of China (NSFC)[41476019] ; Foundation for Innovative Research Groups of NSFC[41421005] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1406401] ; Aoshan Sci-Tec Innovative Project of Qingdao National Laboratory for Marine Science and Technology[2016ASKJ02] ; National Key Research and Development Program of China[2017YFC1404000] ; National Key Research and Development Program of China[2016YFC1401601] ; National Key research and development Plan Sino-Australian Center for Healthy Coasts[2016YFE0101500] ; High Performance Computing Center at the IOCAS ; CNES
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000423431800033
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/158011
Collection海洋环流与波动重点实验室
Corresponding AuthorYin, Bao-shu
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Qingdao, Peoples R China
3.Woods Hole Oceanog Inst, Dept Phys Oceanog, Woods Hole, MA 02543 USA
4.Univ Chinese Acad Sci, Dept Phys Oceanog, Beijing, Peoples R China
5.Nanjing Univ Informat Sci & Technol, Sch Marine Sci, Nanjing, Jiangsu, Peoples R China
6.Australian Inst Marine Sci, Townsville, Qld, 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
Yang, De-Zhou,Huang, Rui Xin,Yin, Bao-shu,et al. Topographic Beta Spiral and Onshore Intrusion of the Kuroshio Current[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(1):287-296.
APA Yang, De-Zhou.,Huang, Rui Xin.,Yin, Bao-shu.,Feng, Xing-Ru.,Chen, Hai-ying.,...&Benthuysen, Jessica A..(2018).Topographic Beta Spiral and Onshore Intrusion of the Kuroshio Current.GEOPHYSICAL RESEARCH LETTERS,45(1),287-296.
MLA Yang, De-Zhou,et al."Topographic Beta Spiral and Onshore Intrusion of the Kuroshio Current".GEOPHYSICAL RESEARCH LETTERS 45.1(2018):287-296.
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