High-resolution sea surface temperature and salinity dynamics in the northern Okinawa Trough over the last 24 kyr
Based 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, SS...
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/177231 2023-05-15T17:32:35+02:00 High-resolution sea surface temperature and salinity dynamics in the northern Okinawa Trough over the last 24 kyr Xu, Ye Chang, Feng-Ming Li, Tie-Gang Li, Bao-Hua 2021-12-01 http://ir.qdio.ac.cn/handle/337002/177230 http://ir.qdio.ac.cn/handle/337002/177231 https://doi.org/10.1016/j.palwor.2020.12.005 英语 eng ELSEVIER PALAEOWORLD http://ir.qdio.ac.cn/handle/337002/177230 http://ir.qdio.ac.cn/handle/337002/177231 doi:10.1016/j.palwor.2020.12.005 Planktonic foraminifera Kuroshio Current East China Sea Millennial-scale climatic events East Asian summer monsoon Paleontology 期刊论文 2021 ftchinacasciocas https://doi.org/10.1016/j.palwor.2020.12.005 2022-06-27T05:46:32Z Based 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. Report North Atlantic Planktonic foraminifera Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Pacific Palaeoworld 30 4 770 785 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Planktonic foraminifera Kuroshio Current East China Sea Millennial-scale climatic events East Asian summer monsoon Paleontology |
spellingShingle |
Planktonic foraminifera Kuroshio Current East China Sea Millennial-scale climatic events East Asian summer monsoon Paleontology Xu, Ye Chang, Feng-Ming Li, Tie-Gang Li, Bao-Hua High-resolution sea surface temperature and salinity dynamics in the northern Okinawa Trough over the last 24 kyr |
topic_facet |
Planktonic foraminifera Kuroshio Current East China Sea Millennial-scale climatic events East Asian summer monsoon Paleontology |
description |
Based 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. |
format |
Report |
author |
Xu, Ye Chang, Feng-Ming Li, Tie-Gang Li, Bao-Hua |
author_facet |
Xu, Ye Chang, Feng-Ming Li, Tie-Gang Li, Bao-Hua |
author_sort |
Xu, Ye |
title |
High-resolution sea surface temperature and salinity dynamics in the northern Okinawa Trough over the last 24 kyr |
title_short |
High-resolution sea surface temperature and salinity dynamics in the northern Okinawa Trough over the last 24 kyr |
title_full |
High-resolution sea surface temperature and salinity dynamics in the northern Okinawa Trough over the last 24 kyr |
title_fullStr |
High-resolution sea surface temperature and salinity dynamics in the northern Okinawa Trough over the last 24 kyr |
title_full_unstemmed |
High-resolution sea surface temperature and salinity dynamics in the northern Okinawa Trough over the last 24 kyr |
title_sort |
high-resolution sea surface temperature and salinity dynamics in the northern okinawa trough over the last 24 kyr |
publisher |
ELSEVIER |
publishDate |
2021 |
url |
http://ir.qdio.ac.cn/handle/337002/177230 http://ir.qdio.ac.cn/handle/337002/177231 https://doi.org/10.1016/j.palwor.2020.12.005 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Planktonic foraminifera |
op_relation |
PALAEOWORLD http://ir.qdio.ac.cn/handle/337002/177230 http://ir.qdio.ac.cn/handle/337002/177231 doi:10.1016/j.palwor.2020.12.005 |
op_doi |
https://doi.org/10.1016/j.palwor.2020.12.005 |
container_title |
Palaeoworld |
container_volume |
30 |
container_issue |
4 |
container_start_page |
770 |
op_container_end_page |
785 |
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1766130785630289920 |