IOCAS-IR  > 海洋地质与环境重点实验室
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
Source PublicationESTUARINE COASTAL AND SHELF SCIENCE
ISSN0272-7714
Volume258Pages:10
Corresponding AuthorLi, Tiegang(tgli@fio.org.cn)
AbstractUnderstanding 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.
KeywordSea-level signatures Deglacial meltwater pulses Abrupt cooling event East China Sea inner shelf
DOI10.1016/j.ecss.2021.107423
Indexed BySCI
Language英语
Funding ProjectStrategic 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 Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectMarine & Freshwater Biology ; Oceanography
WOS IDWOS:000677909500002
PublisherACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
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Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/175929
Collection海洋地质与环境重点实验室
Corresponding AuthorLi, Tiegang
Affiliation1.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
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences;  Center for Ocean Mega-Science, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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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