Sedimentary signatures of the abrupt deglacial rise in sea level from the East China Sea inner shelf
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 inne...
Published in: | Estuarine, Coastal and Shelf Science |
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ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
2021
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Online Access: | http://ir.qdio.ac.cn/handle/337002/175928 http://ir.qdio.ac.cn/handle/337002/175929 https://doi.org/10.1016/j.ecss.2021.107423 |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/175929 2023-05-15T18:01:08+02:00 Sedimentary signatures of the abrupt deglacial rise in sea level from the East China Sea inner shelf Chang, Fengming Li, Tiegang Zhuang, Lihua Sun, Hanjie Xiong, Zhifang Sun, Rongtao 2021-09-05 http://ir.qdio.ac.cn/handle/337002/175928 http://ir.qdio.ac.cn/handle/337002/175929 https://doi.org/10.1016/j.ecss.2021.107423 英语 eng ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD ESTUARINE COASTAL AND SHELF SCIENCE http://ir.qdio.ac.cn/handle/337002/175928 http://ir.qdio.ac.cn/handle/337002/175929 doi:10.1016/j.ecss.2021.107423 Sea-level signatures Deglacial meltwater pulses Abrupt cooling event East China Sea inner shelf Marine & Freshwater Biology Oceanography 期刊论文 2021 ftchinacasciocas https://doi.org/10.1016/j.ecss.2021.107423 2022-06-27T05:46:09Z 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. Report Planktonic foraminifera Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Estuarine, Coastal and Shelf Science 258 107423 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Sea-level signatures Deglacial meltwater pulses Abrupt cooling event East China Sea inner shelf Marine & Freshwater Biology Oceanography |
spellingShingle |
Sea-level signatures Deglacial meltwater pulses Abrupt cooling event East China Sea inner shelf Marine & Freshwater Biology Oceanography Chang, Fengming Li, Tiegang Zhuang, Lihua Sun, Hanjie Xiong, Zhifang Sun, Rongtao Sedimentary signatures of the abrupt deglacial rise in sea level from the East China Sea inner shelf |
topic_facet |
Sea-level signatures Deglacial meltwater pulses Abrupt cooling event East China Sea inner shelf Marine & Freshwater Biology Oceanography |
description |
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. |
format |
Report |
author |
Chang, Fengming Li, Tiegang Zhuang, Lihua Sun, Hanjie Xiong, Zhifang Sun, Rongtao |
author_facet |
Chang, Fengming Li, Tiegang Zhuang, Lihua Sun, Hanjie Xiong, Zhifang Sun, Rongtao |
author_sort |
Chang, Fengming |
title |
Sedimentary signatures of the abrupt deglacial rise in sea level from the East China Sea inner shelf |
title_short |
Sedimentary signatures of the abrupt deglacial rise in sea level from the East China Sea inner shelf |
title_full |
Sedimentary signatures of the abrupt deglacial rise in sea level from the East China Sea inner shelf |
title_fullStr |
Sedimentary signatures of the abrupt deglacial rise in sea level from the East China Sea inner shelf |
title_full_unstemmed |
Sedimentary signatures of the abrupt deglacial rise in sea level from the East China Sea inner shelf |
title_sort |
sedimentary signatures of the abrupt deglacial rise in sea level from the east china sea inner shelf |
publisher |
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD |
publishDate |
2021 |
url |
http://ir.qdio.ac.cn/handle/337002/175928 http://ir.qdio.ac.cn/handle/337002/175929 https://doi.org/10.1016/j.ecss.2021.107423 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
ESTUARINE COASTAL AND SHELF SCIENCE http://ir.qdio.ac.cn/handle/337002/175928 http://ir.qdio.ac.cn/handle/337002/175929 doi:10.1016/j.ecss.2021.107423 |
op_doi |
https://doi.org/10.1016/j.ecss.2021.107423 |
container_title |
Estuarine, Coastal and Shelf Science |
container_volume |
258 |
container_start_page |
107423 |
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1766170473775759360 |