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The evolution of the Kuroshio Current over the last 5 million years since the Pliocene: Evidence from planktonic foraminiferal faunas
Wang, Jia1,3; Chang, Fengming1,2,5; Li, Tiegang2,3,4; Sun, Hanjie1,2,5; Cui, Yikun1,3; Liu, Tianhao1,3
2020-08-17
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
Pages16
AbstractMeridional heat transport of the western Pacific boundary current (the Kuroshio Current) is one of the key factors in global climate change. This current is important because it controls the temperature gradient between low latitudes and the North Pacific and so significantly influences mid-latitude atmosphere-ocean interactions. Here we reconstruct changes in hydrological conditions within the mid-latitude mainstream of the Kuroshio Current based on faunal analysis of planktonic foraminifera in core DSDP 296 from the Northwest Pacific Ocean. This approach enabled us to deduce evolutionary processes within the Kuroshio Current since the Pliocene. A total of 57 species in the coarser section (>150 mu im) were identified; results indicate that planktonic foraminiferal faunal evolution has mainly been characterized by three major stages, the first of which comprised mixed-layer warm-water species ofGlobigerinoides ruberwhich first appeared between 3.5 and 2.7 Ma and then gradually increased in content. Percentages of another warm-water species ofG. conglobatusalso gradually increased in number over this interval. Variations in warm-water species indicate a gradual rise in sea surface temperature (SST) and imply initiation of Kuroshio Current impact on the Northwest Pacific Ocean since at least 3.5 Ma. Secondly, over the period between 2.7 and 2.0 Ma, thermocline species ofGlobigerina calida, Neogloboquadrina humersa, Neogloboquadrina dutertrei, andPulleniatina obliquiloculatastarted to appear in the section. This fauna was dominated byG. ruberas well as increasingG. conglobatuscontents. These features imply a further rise in SST and its gradually enhanced influence on thermocline water, suggesting strengthening of the Kuroshio Current since 2.7 Ma. Thirdly, between 2.0 Ma and present, increasing contents of thermocline species (i.e.,G. calida, N. dutertreiandP. obliquiloculata) indicate a gradual rise in seawater temperature at this depth and also imply more intensive Kuroshio Current during this period. On the basis of comparative records from cores ODP 806 and DSDP 292 from the low latitude Western Pacific, we propose that initiation of the impact of the Kuroshio Current in the Northwest Pacific and it subsequent stepwise intensifications since 3.5 Ma can be closely related to the closure and restriction of the Indonesian and Central American seaways as well as variations in the Western Pacific Warm Pool (WPWP) and equatorial Pacific region.
KeywordPliocene Kuroshio Planktonic foraminifera Western Pacific Warm Pool
DOI10.1007/s11430-019-9641-9
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41830539] ; National Natural Science Foundation of China[41476041] ; Special Project 'Global Change and Atmosphere-Ocean Interactions'[GASI-GEOGE-04] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42030100] ; National Natural Science Foundation of China[41876041] ; Open Fund Project of the Key Laboratory of Marine Sedimentology and Environmental Geology, Ministry of Natural Resources[MASEG201901] ; Taishan Scholar Project
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000561000200001
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/168310
Collection海洋地质与环境重点实验室
Corresponding AuthorChang, Fengming; Li, Tiegang
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.MNR, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Shandong, Peoples R China
5.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Shandong, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang, Jia,Chang, Fengming,Li, Tiegang,et al. The evolution of the Kuroshio Current over the last 5 million years since the Pliocene: Evidence from planktonic foraminiferal faunas[J]. SCIENCE CHINA-EARTH SCIENCES,2020:16.
APA Wang, Jia,Chang, Fengming,Li, Tiegang,Sun, Hanjie,Cui, Yikun,&Liu, Tianhao.(2020).The evolution of the Kuroshio Current over the last 5 million years since the Pliocene: Evidence from planktonic foraminiferal faunas.SCIENCE CHINA-EARTH SCIENCES,16.
MLA Wang, Jia,et al."The evolution of the Kuroshio Current over the last 5 million years since the Pliocene: Evidence from planktonic foraminiferal faunas".SCIENCE CHINA-EARTH SCIENCES (2020):16.
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