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Intrusion Pattern of the Offshore Kuroshio Branch Current and Its Effects on Nutrient Contributions in the East China Sea
Wang, Wentao1; Yu, Zhiming1; Song, Xiuxian1; Yuan, Yongquan1; Wu, Zaixing1; Zhou, Peng1,2; Cao, Xihua1
2018-03-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN2169-9275
Volume123Issue:3Pages:2116-2128
SubtypeArticle
AbstractDuring the autumn season of 2014 (October-November), nutrient samples and nitrogen and oxygen isotope samples from the East China Sea (ECS) were collected and analyzed, and auxiliary physical parameters were determined. Distinctive high-salinity water column conditions with significant haloclines and pycnoclines similar to those observed during the spring were detected at the bottom of the ECS during the autumn. These water column conditions were attributed to the intrusion of the Kuroshio Subsurface Water (KSSW), which then separated into two currents, including the Offshore Kuroshio Branch Current (OKBC). Compared with spring, this intrusion transported higher phosphorus (P) concentrations onto the ECS continental shelf in autumn. However, according to multiple analyses, biogeochemical nitrogen processes are unable to explain the variations in the P concentrations (increase) while assuming that each distinctive water column is consistent. Identifying the water columns by their salinities and P concentrations revealed that the northern ECS water column was similar to the deep KSSW while the southern ECS water column was similar to the shallow KSSW. Therefore, we speculate that the distinctions among the seasonal variations of P-enriched water masses were attributable to the different intrusion positions of the Kuroshio. The shift of the KSSW intrusion location moved toward the northeast during the autumn relative to the spring. This shift, which was proved by the oceanic vortex data, caused the deeper KSSW water upwelled to the ECS and formed the OKBC, thereby supplying additional P during the autumn.
KeywordEast China Sea Kuroshio phosphate branch current intrusion nutrients cycles
Subject AreaOceanography
DOI10.1002/2017JC013538
Indexed BySCIE
Language英语
WOS Research AreaOceanography
WOS IDWOS:000430918500031
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/157592
Collection海洋生态与环境科学重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang, Wentao,Yu, Zhiming,Song, Xiuxian,et al. Intrusion Pattern of the Offshore Kuroshio Branch Current and Its Effects on Nutrient Contributions in the East China Sea[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2018,123(3):2116-2128.
APA Wang, Wentao.,Yu, Zhiming.,Song, Xiuxian.,Yuan, Yongquan.,Wu, Zaixing.,...&Cao, Xihua.(2018).Intrusion Pattern of the Offshore Kuroshio Branch Current and Its Effects on Nutrient Contributions in the East China Sea.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,123(3),2116-2128.
MLA Wang, Wentao,et al."Intrusion Pattern of the Offshore Kuroshio Branch Current and Its Effects on Nutrient Contributions in the East China Sea".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 123.3(2018):2116-2128.
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