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Sedimentary signatures of the abrupt deglacial rise in sea level from the East China Sea inner shelf
Chang, Fengming1,2,4; Li, Tiegang2,3; Zhuang, Lihua1,2,4; Sun, Hanjie1,2,4; Xiong, Zhifang2,3; Sun, Rongtao5
2021-09-05
发表期刊ESTUARINE COASTAL AND SHELF SCIENCE
ISSN0272-7714
卷号258页码:10
通讯作者Li, Tiegang(tgli@fio.org.cn)
摘要Understanding the link between deglacial sea-level jumps and abrupt climate change may provide crucial insights into future ice-climate feedbacks. However, much ambiguity remains surrounding many of the last deglacial meltwater pulses. Here, we present a complete sedimentary succession from the inner shelf of the East China Sea, which has clearly documented multiple abrupt rises in the deglacial sea level. The results suggest that the postglacial sedimentary sequence, resting on a late Pleistocene basement of stiff clay, formed during a threestage process marked by characteristic lithology and foraminiferal fauna. The abrupt shifts in the sedimentary facies indicate that seawater firstly intruded into the inner shelf just before the onset of the slowdown in sea-level rise caused by the Younger Dryas cooling event and changed the inner shelf into a tidal flat environment, as demonstrated by the sudden appearance of both planktonic foraminifera and typical brackish-water species of benthic foraminifera. Meltwater pulse 1B (MWP-1B) is depicted by a sharp upward transition to a nearshore subtidal environment at 11.62 kyr. This episode of sea-level rise induced the initial flooding of the inner shelf, which is well documented by the sudden reduction in brackish-water foraminifera species and evident increase in inner-shelf benthic species. The prominent sea-level rise at approximately 7.54 kyr was responsible for the shift to stable inner shelf conditions and resulted in the maximum flooding of the inner shelf area, initiating subsequent formation of the alongshore mud wedge. Additionally, obvious peaks in both the benthic foraminifer abundance and the marine algae concentration at approximately 8.13 kyr confirm the previously identified sealevel jump at approximately 8.2 kyr, which coincides with the weakening of the Asian monsoon demonstrated by the peak grain size in our record, further indicating its apparent connection to the 8.2 kyr climatic reversal.
关键词Sea-level signatures Deglacial meltwater pulses Abrupt cooling event East China Sea inner shelf
DOI10.1016/j.ecss.2021.107423
收录类别SCI
语种英语
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] ; National Special Project for Global Change and Air-Sea Interaction[GASI-GEOGE-04] ; National Natural Science Foundation of China[42076051] ; National Natural Science Foundation of China[41830539] ; National Natural Science Foundation of China[41876041]
WOS研究方向Marine & Freshwater Biology ; Oceanography
WOS类目Marine & Freshwater Biology ; Oceanography
WOS记录号WOS:000677909500002
出版者ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/175929
专题海洋地质与环境重点实验室
通讯作者Li, Tiegang
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
3.SOA, Key Lab Marine Sedimentol & Environm Geol, Inst Oceanog 1, Qingdao 266061, Peoples R China
4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
5.Shandong Univ Technol, Sch Resources & Environm Engn, Zibo 255049, Peoples R China
第一作者单位中国科学院海洋研究所;  中国科学院海洋大科学研究中心
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Chang, Fengming,Li, Tiegang,Zhuang, Lihua,et al. Sedimentary signatures of the abrupt deglacial rise in sea level from the East China Sea inner shelf[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2021,258:10.
APA Chang, Fengming,Li, Tiegang,Zhuang, Lihua,Sun, Hanjie,Xiong, Zhifang,&Sun, Rongtao.(2021).Sedimentary signatures of the abrupt deglacial rise in sea level from the East China Sea inner shelf.ESTUARINE COASTAL AND SHELF SCIENCE,258,10.
MLA Chang, Fengming,et al."Sedimentary signatures of the abrupt deglacial rise in sea level from the East China Sea inner shelf".ESTUARINE COASTAL AND SHELF SCIENCE 258(2021):10.
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