Enhanced subglacial discharge from Antarctica during meltwater pulse 1A

doi:10.1038/s41467-023-42974-0

	Enhanced subglacial discharge from Antarctica during meltwater pulse 1A
	Li, Tao 4,5,6; Robinson, Laura F.3,5; Macgilchrist, Graeme A.1,2; Chen, Tianyu 4; Stewart, Joseph A.5; Burke, Andrea 1; Wang, Maoyu 4; Li, Gaojun 4; Chen, Jun 4; Rae, James W. B.1
刊名	NATURE COMMUNICATIONS
	2023-11-13
卷号	14 期号:1 页码:10
DOI	10.1038/s41467-023-42974-0
通讯作者	Li, Tao(taoli@nigpas.ac.cn)
英文摘要	Subglacial discharge from the Antarctic Ice Sheet (AIS) likely played a crucial role in the loss of the ice sheet and the subsequent rise in sea level during the last deglaciation. However, no direct proxy is currently available to document subglacial discharge from the AIS, which leaves significant gaps in our understanding of the complex interactions between subglacial discharge and ice-sheet stability. Here we present deep-sea coral 234U/238U records from the Drake Passage in the Southern Ocean to track subglacial discharge from the AIS. Our findings reveal distinctively higher seawater 234U/238U values from 15,400 to 14,000 years ago, corresponding to the period of the highest iceberg-rafted debris flux and the occurrence of the meltwater pulse 1A event. This correlation suggests a causal link between enhanced subglacial discharge, synchronous retreat of the AIS, and the rapid rise in sea levels. The enhanced subglacial discharge and subsequent AIS retreat appear to have been preconditioned by a stronger and warmer Circumpolar Deep Water, thus underscoring the critical role of oceanic heat in driving major ice-sheet retreat. This study presents seawater uranium isotope records based on deep-sea corals from the Drake Passage to track subglacial discharge from the Antarctic Ice Sheet, demonstrating a causal link between enhanced subglacial discharge, retreat of the ice sheet, and the rapid rise in sea levels.
资助项目	National Natural Science Foundation of China (National Science Foundation of China)[NBP11-03] ; National Natural Science Foundation of China[41991325] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40010200] ; European Research Council ; Natural Environmental Research Council ; U.S. National Science Foundation[PLR-1425989] ; UK Research and Innovation[MR/W013835/1] ; National Oceanic and Atmospheric Administration (NOAA) Ocean Exploration Trust ; State Key Laboratory of Palaeobiology and Stratigraphy
WOS关键词	SEA-LEVEL ; SOUTHERN-OCEAN ; ICE SHELF ; OVERTURNING CIRCULATION ; SEAWATER U-234/U-238 ; EAST ANTARCTICA ; COLLAPSE ; WATER ; VARIABILITY ; CORALS
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PORTFOLIO
WOS记录号	WOS:001126808200004
资助机构	National Natural Science Foundation of China (National Science Foundation of China) ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; European Research Council ; Natural Environmental Research Council ; U.S. National Science Foundation ; UK Research and Innovation ; National Oceanic and Atmospheric Administration (NOAA) Ocean Exploration Trust ; State Key Laboratory of Palaeobiology and Stratigraphy
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/42888]
专题	中国科学院南京地质古生物研究所
通讯作者	Li, Tao
作者单位	1.Univ St Andrews, Sch Earth & Environm Sci, St Andrews, Scotland 2.Princeton Univ, Program Atmospher & Ocean Sci, Princeton, NJ USA 3.Univ York, Dept Environm & Geog, York, England 4.Nanjing Univ, Dept Earth & Planetary Sci, Nanjing, Peoples R China 5.Univ Bristol, Sch Earth Sci, Bristol, England 6.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Li, Tao,Robinson, Laura F.,Macgilchrist, Graeme A.,et al. Enhanced subglacial discharge from Antarctica during meltwater pulse 1A[J]. NATURE COMMUNICATIONS,2023,14(1):10.
APA	Li, Tao.,Robinson, Laura F..,Macgilchrist, Graeme A..,Chen, Tianyu.,Stewart, Joseph A..,...&Rae, James W. B..(2023).Enhanced subglacial discharge from Antarctica during meltwater pulse 1A.NATURE COMMUNICATIONS,14(1),10.
MLA	Li, Tao,et al."Enhanced subglacial discharge from Antarctica during meltwater pulse 1A".NATURE COMMUNICATIONS 14.1(2023):10.