Response of the northwestern Pacific upper water delta (13)C to the last deglacial ventilation of the deep Southern Ocean

IOCAS-IR > 海洋地质与环境重点实验室

	Response of the northwestern Pacific upper water delta (13)C to the last deglacial ventilation of the deep Southern Ocean
	Chen ShuangXi; Li TieGang; Tang Zheng; Qiu XiaoHua; Xiong ZhiFang; Nan QingYun; Xu ZhaoKai; Chang FengMing; Li, TG (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
	2011
发表期刊	CHINESE SCIENCE BULLETIN
ISSN	1001-6538
卷号	56 期号:24 页码:2628-2634
摘要	The deglacial delta (13)C minimum events that originated from the ventilation of the deep Southern Ocean around Antarctica, have been recorded in a range of marine sediments from the southern to tropical oceans in late Pleistocene. However, the broad delta (13)C minimum event was also reported as far as to the northern middle latitudes, in northwestern Pacific marginal sea areas, during the last deglaciation. In the northwestern Pacific, forcing from the northern high latitudes is strongly expressed, while the records of influence from the southern high latitudes are few. The Kuroshio Source Region (KSR) forms a boundary between the northwestern Pacific and the southern, tropical Pacific. So, high-resolution planktonic foraminiferal records in core MD06-3054 from the KSR are well positioned to identify signals from the southern hemisphere in the northwestern Pacific. Planktonic foraminiferal tests from the upper 1030 cm of the core were subject to AMS(14)C, carbon and oxygen isotopic measurements. A negative excursion was found to occur from about 20.0-6.0 ka BP in delta (13)C records of both surface (Globigerinoides ruber) and subsurface (Pulleniatina obliquiloculata) dwellers, but the overall trends of the two curves have reversed since 26.5 ka BP. Moreover, the delta (13)C record of G. ruber (the surface dweller) shows a robust link to the record of atmospheric CO(2), and its changes precede the records of P. obliquiloculata (the subsurface dweller). According to the hydrologic conditions, the broad delta (13)C minimum event recorded in the KSR is also a response to the increasing ventilation of the deep Southern Ocean around Antarctica during the last deglaciation. The inconsistency between the records of the surface and subsurface dwellers was possibly caused by the ways that the low delta (13)C signal was transmitted. Subsurface water primarily received the low delta (13)C signal from the Antarctic Intermediate Water (AAIW), whereas the surface water was probably mainly impacted by atmospheric CO(2) in the KSR. The records from the KSR confirm the deduction that the broad delta (13)C minimum event in the Okinawa Trough was due to the impact of tropical Pacific surface water during the last deglaciation, and suggest that signals from the southern high latitudes also can be delivered to the northern middle latitudes.
关键词	Planktonic Foraminiferal Delta(13)c Ventilation Of The Deep souThern Ocean Northwestern Pacific Last Deglaciation Delta(13)c Minimum Event
学科领域	Science & Technology - Other Topics
URL	查看原文
收录类别	sci
语种	英语
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/11525
专题	海洋地质与环境重点实验室
通讯作者	Li, TG (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Chen ShuangXi,Li TieGang,Tang Zheng,et al. Response of the northwestern Pacific upper water delta (13)C to the last deglacial ventilation of the deep Southern Ocean[J]. CHINESE SCIENCE BULLETIN,2011,56(24):2628-2634.
APA	Chen ShuangXi.,Li TieGang.,Tang Zheng.,Qiu XiaoHua.,Xiong ZhiFang.,...&Li, TG .(2011).Response of the northwestern Pacific upper water delta (13)C to the last deglacial ventilation of the deep Southern Ocean.CHINESE SCIENCE BULLETIN,56(24),2628-2634.
MLA	Chen ShuangXi,et al."Response of the northwestern Pacific upper water delta (13)C to the last deglacial ventilation of the deep Southern Ocean".CHINESE SCIENCE BULLETIN 56.24(2011):2628-2634.

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