IOCAS-IR
High-resolution sea surface temperature and salinity dynamics in the northern Okinawa Trough over the last 24 kyr
Xu, Ye1,2,3,4,5; Chang, Feng-Ming1,2,6; Li, Tie-Gang5,6,7; Li, Bao-Hua3,4
2021-12-01
Source PublicationPALAEOWORLD
ISSN1871-174X
Volume30Issue:4Pages:770-785
Corresponding AuthorChang, Feng-Ming(chfm@qdio.ac.cn) ; Li, Bao-Hua(bh-li@nigpas.ac.cn)
AbstractBased on the high-resolution Mg/Ca and oxygen isotope ratio (818O) of planktonic foraminifera Globigerinoides ruber, sea surface temperature (SST) and salinity (SSS) were reconstructed in Core PC-1 from the northern Okinawa Trough during the last 24 kyr. From the last glacial maximum to Holocene, SST varied from 20.2 degrees C to 24.6 degrees C. Millennial-scale climatic events of the SST during the last glacial, such as the Heinrich events, Bolling-Allerod warming, and Younger Dryas, have been identified, which are synchronous with the climate changes in the North Atlantic, suggesting a teleconnection between the northwestern Pacific and the North Atlantic. During the last 24 kyr, the SSS variation can be divided into three parts: (1) during 21-15.5 ka, there was a significantly low SSS; (2) during 15.5- 11.7 ka, the SSS increased obviously; (3) since 11.7 ka, the SSS is relatively stable. In order to discuss the main factors influencing the SSS in the northern Okinawa Trough, the relative abundance of Pulleniatina obliquiloculata and the oxygen isotope difference between the northern and middle Okinawa Trough (D818Osw) have been used to indicate the intensity of the Kuroshio Current and Changjiang freshwater discharge, respectively. The D818Osw result shows that there is a large amount of Changjiang freshwater emptied into the northern Okinawa Trough during 18-15.5 ka, which is caused by the subtropical monsoon rain band lingering in the lower reaches of the Changjiang River drainage, supporting the Jet Transition Hypothesis. As the Kuroshio Current strengthened since 15.5 ka as indicated by the increased relative abundance of P. obliquiloculata, the variation of Kuroshio Current became the more important contribution to the SSS in the study region. The results of our study indicate that the key factor influencing the SSS in the northern Okinawa Trough is variable during the last 24 kyr. (c) 2020 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights reserved.
KeywordPlanktonic foraminifera Kuroshio Current East China Sea Millennial-scale climatic events East Asian summer monsoon
DOI10.1016/j.palwor.2020.12.005
Indexed BySCI
Language英语
Funding ProjectNational Nat-ural Science Foundation of China[41476041] ; National Nat-ural Science Foundation of China[41776073] ; National Special Project for 'Global Change and Air-Sea Interaction'[GASI-GEOGE-04] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000]
WOS Research AreaPaleontology
WOS SubjectPaleontology
WOS IDWOS:000721720400005
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/177231
Collection中国科学院海洋研究所
Corresponding AuthorChang, Feng-Ming; Li, Bao-Hua
Affiliation1.Chinese Acad Sci, Inst Oceanog, 7 Nanhai Rd, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, 7 Nanhai Rd, Qingdao 266071, Peoples R China
3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, 39 East Beijing Rd, Nanjing 210008, Peoples R China
4.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, 39 East Beijing Rd, Nanjing 210008, Peoples R China
5.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
6.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266000, Peoples R China
7.Minist Nat Resources, Inst Oceanog 1, 6 Xianxialing Rd, Qingdao 266061, 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
Xu, Ye,Chang, Feng-Ming,Li, Tie-Gang,et al. High-resolution sea surface temperature and salinity dynamics in the northern Okinawa Trough over the last 24 kyr[J]. PALAEOWORLD,2021,30(4):770-785.
APA Xu, Ye,Chang, Feng-Ming,Li, Tie-Gang,&Li, Bao-Hua.(2021).High-resolution sea surface temperature and salinity dynamics in the northern Okinawa Trough over the last 24 kyr.PALAEOWORLD,30(4),770-785.
MLA Xu, Ye,et al."High-resolution sea surface temperature and salinity dynamics in the northern Okinawa Trough over the last 24 kyr".PALAEOWORLD 30.4(2021):770-785.
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