Chen, T, Robinson, LF, Beasley, MP et al. (6 more authors) (2016) Ocean mixing and ice-sheet control of seawater ²³⁴U/²³⁸U during the last deglaciation. Science, 354 (6312). pp. 626-629. ISSN 0036-8075
Abstract
Seawater ²³⁴U/²³⁸U provides global-scale information on continental weathering and is vital for marine U-series geochronology. Previous evidence supports an increase in ²³⁴U/²³⁸U since the last glacial, but the timing and amplitude of its variability was poorly constrained. Here we report two seawater ²³⁴U/²³⁸U records based on well-preserved deep-sea corals from the low latitude Atlantic and Pacific. The Atlantic ²³⁴U/²³⁸U starts to increase before major sea level rise and overshoots the modern value by 3‰ in the early deglaciation. Deglacial ²³⁴U/²³⁸U of the Pacific converges with the Atlantic after the abrupt resumption of Atlantic meridional overturning. We suggest that ocean mixing and early deglacial release of excess ²³⁴U from enhanced subglacial melt activity of the Northern Hemisphere ice sheets have driven the observed ²³⁴U/²³⁸U evolution.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © The Authors 2016. This is the author’s version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science on 354, 04 Nov 2016, DOI: 10.1126/science.aag1015. |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 26 Sep 2016 14:36 |
Last Modified: | 28 Jan 2021 11:08 |
Published Version: | http://dx.doi.org/10.1126/science.aag1015 |
Status: | Published |
Publisher: | American Association for the Advancement of Science |
Identification Number: | 10.1126/science.aag1015 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:105167 |