Ocean mixing and ice-sheet control of seawater 234 U/ 238 U during the last deglaciation
Seawater 234 U/ 238 U provides global-scale information about continental weathering and is vital for marine uranium-series geochronology. Existing evidence supports an increase in 234 U/ 238 U since the last glacial period, but the timing and amplitude of its variability has been poorly constrained...
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2016
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Online Access: | https://hdl.handle.net/1983/3c0285ed-d329-4824-a7c4-d96776259d3d https://research-information.bris.ac.uk/en/publications/3c0285ed-d329-4824-a7c4-d96776259d3d https://doi.org/10.1126/science.aag1015 https://research-information.bris.ac.uk/ws/files/86693584/Uranium_isotopes_revision_Sep1.pdf http://www.scopus.com/inward/record.url?scp=84990834284&partnerID=8YFLogxK |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/3c0285ed-d329-4824-a7c4-d96776259d3d 2024-01-28T10:06:31+01:00 Ocean mixing and ice-sheet control of seawater 234 U/ 238 U during the last deglaciation Chen, Tianyu Robinson, Laura Beasley, Matthew Claxton, Louis Anderson, Morten Gregoire, Lauren Wadham, Jemma Fornari, Daniel Harpp, Karen 2016-11-04 application/pdf https://hdl.handle.net/1983/3c0285ed-d329-4824-a7c4-d96776259d3d https://research-information.bris.ac.uk/en/publications/3c0285ed-d329-4824-a7c4-d96776259d3d https://doi.org/10.1126/science.aag1015 https://research-information.bris.ac.uk/ws/files/86693584/Uranium_isotopes_revision_Sep1.pdf http://www.scopus.com/inward/record.url?scp=84990834284&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Chen , T , Robinson , L , Beasley , M , Claxton , L , Anderson , M , Gregoire , L , Wadham , J , Fornari , D & Harpp , K 2016 , ' Ocean mixing and ice-sheet control of seawater 234 U/ 238 U during the last deglaciation ' , Science , vol. 354 , no. 6312 , pp. 626-629 . https://doi.org/10.1126/science.aag1015 article 2016 ftubristolcris https://doi.org/10.1126/science.aag1015 2024-01-04T23:50:11Z Seawater 234 U/ 238 U provides global-scale information about continental weathering and is vital for marine uranium-series geochronology. Existing evidence supports an increase in 234 U/ 238 U since the last glacial period, but the timing and amplitude of its variability has been poorly constrained. Here we report two seawater 234 U/ 238 U records based on well-preserved deep-sea corals from the low-latitude Atlantic and Pacific Oceans. The Atlantic 234 U/ 238 U started to increase before major sea-level rise and overshot the modern value by 3 per mil during the early deglaciation. Deglacial 234 U/ 238 U in the Pacific converged with that in the Atlantic after the abrupt resumption of Atlantic meridional overturning.We suggest that ocean mixing and early deglacial release of excess 234 U from enhanced subglacial melting of the Northern Hemisphere ice sheets have driven the observed 234 U/ 238 U evolution. Article in Journal/Newspaper Ice Sheet University of Bristol: Bristol Research Pacific Science 354 6312 626 629 |
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Open Polar |
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University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
description |
Seawater 234 U/ 238 U provides global-scale information about continental weathering and is vital for marine uranium-series geochronology. Existing evidence supports an increase in 234 U/ 238 U since the last glacial period, but the timing and amplitude of its variability has been poorly constrained. Here we report two seawater 234 U/ 238 U records based on well-preserved deep-sea corals from the low-latitude Atlantic and Pacific Oceans. The Atlantic 234 U/ 238 U started to increase before major sea-level rise and overshot the modern value by 3 per mil during the early deglaciation. Deglacial 234 U/ 238 U in the Pacific converged with that in the Atlantic after the abrupt resumption of Atlantic meridional overturning.We suggest that ocean mixing and early deglacial release of excess 234 U from enhanced subglacial melting of the Northern Hemisphere ice sheets have driven the observed 234 U/ 238 U evolution. |
format |
Article in Journal/Newspaper |
author |
Chen, Tianyu Robinson, Laura Beasley, Matthew Claxton, Louis Anderson, Morten Gregoire, Lauren Wadham, Jemma Fornari, Daniel Harpp, Karen |
spellingShingle |
Chen, Tianyu Robinson, Laura Beasley, Matthew Claxton, Louis Anderson, Morten Gregoire, Lauren Wadham, Jemma Fornari, Daniel Harpp, Karen Ocean mixing and ice-sheet control of seawater 234 U/ 238 U during the last deglaciation |
author_facet |
Chen, Tianyu Robinson, Laura Beasley, Matthew Claxton, Louis Anderson, Morten Gregoire, Lauren Wadham, Jemma Fornari, Daniel Harpp, Karen |
author_sort |
Chen, Tianyu |
title |
Ocean mixing and ice-sheet control of seawater 234 U/ 238 U during the last deglaciation |
title_short |
Ocean mixing and ice-sheet control of seawater 234 U/ 238 U during the last deglaciation |
title_full |
Ocean mixing and ice-sheet control of seawater 234 U/ 238 U during the last deglaciation |
title_fullStr |
Ocean mixing and ice-sheet control of seawater 234 U/ 238 U during the last deglaciation |
title_full_unstemmed |
Ocean mixing and ice-sheet control of seawater 234 U/ 238 U during the last deglaciation |
title_sort |
ocean mixing and ice-sheet control of seawater 234 u/ 238 u during the last deglaciation |
publishDate |
2016 |
url |
https://hdl.handle.net/1983/3c0285ed-d329-4824-a7c4-d96776259d3d https://research-information.bris.ac.uk/en/publications/3c0285ed-d329-4824-a7c4-d96776259d3d https://doi.org/10.1126/science.aag1015 https://research-information.bris.ac.uk/ws/files/86693584/Uranium_isotopes_revision_Sep1.pdf http://www.scopus.com/inward/record.url?scp=84990834284&partnerID=8YFLogxK |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Chen , T , Robinson , L , Beasley , M , Claxton , L , Anderson , M , Gregoire , L , Wadham , J , Fornari , D & Harpp , K 2016 , ' Ocean mixing and ice-sheet control of seawater 234 U/ 238 U during the last deglaciation ' , Science , vol. 354 , no. 6312 , pp. 626-629 . https://doi.org/10.1126/science.aag1015 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1126/science.aag1015 |
container_title |
Science |
container_volume |
354 |
container_issue |
6312 |
container_start_page |
626 |
op_container_end_page |
629 |
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1789333450351706112 |