Enhanced subglacial discharge from Antarctica during meltwater pulse 1A
This research is funded by the National Natural Science Foundation of China (41991325, T.L. and T.C.), the Strategic Priority Research Program of Chinese Academy of Sciences (XDB40010200, T.L. and T.C.), the European Research Council, the Natural Environmental Research Council, the U.S. National Sci...
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Online Access: | https://hdl.handle.net/10023/28689 https://doi.org/10.1038/s41467-023-42974-0 |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/28689 2024-05-19T07:32:35+00:00 Enhanced subglacial discharge from Antarctica during meltwater pulse 1A Li, Tao Robinson, Laura F. MacGilchrist, Graeme Chen, Tianyu Stewart, Joseph A. Burke, Andrea Wang, Maoyu Chen, Jun Rae, James W. B. Medical Research Council University of St Andrews. School of Earth & Environmental Sciences University of St Andrews. St Andrews Isotope Geochemistry University of St Andrews. Centre for Energy Ethics 2023-11-14T10:30:01Z 10 2263279 application/pdf https://hdl.handle.net/10023/28689 https://doi.org/10.1038/s41467-023-42974-0 eng eng Nature Communications 296320730 cab634bd-7d74-41ab-ac76-d995c35a4444 85176358171 Li , T , Robinson , L F , MacGilchrist , G , Chen , T , Stewart , J A , Burke , A , Wang , M , Chen , J & Rae , J W B 2023 , ' Enhanced subglacial discharge from Antarctica during meltwater pulse 1A ' , Nature Communications , vol. 14 , 7327 . https://doi.org/10.1038/s41467-023-42974-0 2041-1723 ORCID: /0000-0002-3754-1498/work/146962836 ORCID: /0000-0003-3904-2526/work/146962844 ORCID: /0000-0003-1409-8937/work/146964132 https://hdl.handle.net/10023/28689 doi:10.1038/s41467-023-42974-0 MR/W013835/1 GE Environmental Sciences GC Oceanography DAS GE GC Journal article 2023 ftstandrewserep https://doi.org/10.1038/s41467-023-42974-0 2024-04-30T23:32:55Z This research is funded by the National Natural Science Foundation of China (41991325, T.L. and T.C.), the Strategic Priority Research Program of Chinese Academy of Sciences (XDB40010200, T.L. and T.C.), the European Research Council, the Natural Environmental Research Council, the U.S. National Science Foundation (PLR-1425989, G.A.M), the UK Research and Innovation (MR/W013835/1, G.A.M), the National Oceanic and Atmospheric Administration (NOAA) Ocean Exploration Trust, and the State Key Laboratory of Palaeobiology and Stratigraphy. 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. Peer reviewed Article in Journal/Newspaper Antarc* Antarctic Antarctica Drake Passage Ice Sheet Iceberg* Southern Ocean University of St Andrews: Digital Research Repository Nature Communications 14 1 |
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University of St Andrews: Digital Research Repository |
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English |
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GE Environmental Sciences GC Oceanography DAS GE GC |
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GE Environmental Sciences GC Oceanography DAS GE GC Li, Tao Robinson, Laura F. MacGilchrist, Graeme Chen, Tianyu Stewart, Joseph A. Burke, Andrea Wang, Maoyu Chen, Jun Rae, James W. B. Enhanced subglacial discharge from Antarctica during meltwater pulse 1A |
topic_facet |
GE Environmental Sciences GC Oceanography DAS GE GC |
description |
This research is funded by the National Natural Science Foundation of China (41991325, T.L. and T.C.), the Strategic Priority Research Program of Chinese Academy of Sciences (XDB40010200, T.L. and T.C.), the European Research Council, the Natural Environmental Research Council, the U.S. National Science Foundation (PLR-1425989, G.A.M), the UK Research and Innovation (MR/W013835/1, G.A.M), the National Oceanic and Atmospheric Administration (NOAA) Ocean Exploration Trust, and the State Key Laboratory of Palaeobiology and Stratigraphy. 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. Peer reviewed |
author2 |
Medical Research Council University of St Andrews. School of Earth & Environmental Sciences University of St Andrews. St Andrews Isotope Geochemistry University of St Andrews. Centre for Energy Ethics |
format |
Article in Journal/Newspaper |
author |
Li, Tao Robinson, Laura F. MacGilchrist, Graeme Chen, Tianyu Stewart, Joseph A. Burke, Andrea Wang, Maoyu Chen, Jun Rae, James W. B. |
author_facet |
Li, Tao Robinson, Laura F. MacGilchrist, Graeme Chen, Tianyu Stewart, Joseph A. Burke, Andrea Wang, Maoyu Chen, Jun Rae, James W. B. |
author_sort |
Li, Tao |
title |
Enhanced subglacial discharge from Antarctica during meltwater pulse 1A |
title_short |
Enhanced subglacial discharge from Antarctica during meltwater pulse 1A |
title_full |
Enhanced subglacial discharge from Antarctica during meltwater pulse 1A |
title_fullStr |
Enhanced subglacial discharge from Antarctica during meltwater pulse 1A |
title_full_unstemmed |
Enhanced subglacial discharge from Antarctica during meltwater pulse 1A |
title_sort |
enhanced subglacial discharge from antarctica during meltwater pulse 1a |
publishDate |
2023 |
url |
https://hdl.handle.net/10023/28689 https://doi.org/10.1038/s41467-023-42974-0 |
genre |
Antarc* Antarctic Antarctica Drake Passage Ice Sheet Iceberg* Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Drake Passage Ice Sheet Iceberg* Southern Ocean |
op_relation |
Nature Communications 296320730 cab634bd-7d74-41ab-ac76-d995c35a4444 85176358171 Li , T , Robinson , L F , MacGilchrist , G , Chen , T , Stewart , J A , Burke , A , Wang , M , Chen , J & Rae , J W B 2023 , ' Enhanced subglacial discharge from Antarctica during meltwater pulse 1A ' , Nature Communications , vol. 14 , 7327 . https://doi.org/10.1038/s41467-023-42974-0 2041-1723 ORCID: /0000-0002-3754-1498/work/146962836 ORCID: /0000-0003-3904-2526/work/146962844 ORCID: /0000-0003-1409-8937/work/146964132 https://hdl.handle.net/10023/28689 doi:10.1038/s41467-023-42974-0 MR/W013835/1 |
op_doi |
https://doi.org/10.1038/s41467-023-42974-0 |
container_title |
Nature Communications |
container_volume |
14 |
container_issue |
1 |
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1799470696862056448 |