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Glacial paleoceanography off the mouth of the Mekong River, southern South China Sea, during the last 500 ka
Li, QY; Zheng, F; Chen, MH; Xiang, R; Qiao, PJ; Shao, L; Cheng, XR; qli01@tongji.edu.cn
2010
发表期刊QUATERNARY RESEARCH
ISSN0033-5894
卷号73期号:3页码:563-572
摘要We have analyzed core MD01-2392, similar to 360 km east of the Mekong River mouth in the South China Sea (SCS). Over the past 500 ka, planktonic foraminiferal oxygen-isotopic values are consistently lighter than northern SCS and open-ocean records by up to 0.5 parts per thousand, indicating the influence of run-off from the Mekong River during both glacial and interglacial periods. Carbonate content is higher during interglacials; sedimentation rates were higher during glacials. Increased sedimentation rates since 30 ka imply increased run-off during the last glacial maximum and Holocene Period. Contrary to general experience, in which it is classed as a warm species for temperature estimates, the thermocline-dwelling species Pulleniatina obliquiloculata increased its numbers during glacial periods. This implies an estuarine circulation and even brackish-water caps during glacial periods, reinforcing the sense of strong run-off. In an overall decline of warm water, the thermocline shoaled stepwise, with rapid rises across the glacial terminations. We infer that the southern SCS was opened to an influx of Indian Ocean waters through southern passages at those times of rising sea levels. (C) 2010 University of Washington. Published by Elsevier Inc. All rights reserved.
部门归属[Li, Qianyu; Qiao, Peijun; Shao, Lei; Cheng, Xinrong] Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China; [Li, Qianyu] Univ Adelaide, Sch Earth & Environm Sci, Adelaide, SA 5005, Australia; [Zheng, Fan; Chen, Muhong; Xiang, Rong] Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China
关键词Late Pleistocene Holocene Glacial Cycles Planktonic Foraminifera Thermocline Monsoons South China Sea Mekong River Mouth
学科领域Geography, Physical ; Geosciences, Multidisciplinary
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收录类别sci
资助项目海洋地质
WOS记录号WOS:000277557200014
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被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/4324
专题中科院边缘海地质重点实验室
通讯作者qli01@tongji.edu.cn
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Li, QY,Zheng, F,Chen, MH,et al. Glacial paleoceanography off the mouth of the Mekong River, southern South China Sea, during the last 500 ka[J]. QUATERNARY RESEARCH,2010,73(3):563-572.
APA Li, QY.,Zheng, F.,Chen, MH.,Xiang, R.,Qiao, PJ.,...&qli01@tongji.edu.cn.(2010).Glacial paleoceanography off the mouth of the Mekong River, southern South China Sea, during the last 500 ka.QUATERNARY RESEARCH,73(3),563-572.
MLA Li, QY,et al."Glacial paleoceanography off the mouth of the Mekong River, southern South China Sea, during the last 500 ka".QUATERNARY RESEARCH 73.3(2010):563-572.
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