Persistently well-ventilated intermediate-depth ocean through the last deglaciation
Chen, T.; Robinson, L.F.; Burke, A.; Claxton, L.M.; Hain, M.P.; Li, T.; Rae, J.W.B.; Stewart, J.; Knowles, T.D.J.; Fornari, D.J.; Harpp, K.S. (2020). Persistently well-ventilated intermediate-depth ocean through the last deglaciation. Nature Geoscience 13(11): 733-738. https://dx.doi.org/10.1038/s41561-020-0638-6
In: Nature Geoscience. Nature Publishing Group: London. ISSN 1752-0894; e-ISSN 1752-0908, meer
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| Auteurs | | Top |
- Chen, T.
- Robinson, L.F.
- Burke, A.
- Claxton, L.M.
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- Hain, M.P.
- Li, T.
- Rae, J.W.B.
- Stewart, J.
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- Knowles, T.D.J.
- Fornari, D.J.
- Harpp, K.S.
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| Abstract |
During the last deglaciation (~18–11 thousand years ago), existing radiocarbon (14C) reconstructions of intermediate waters in the mid- to low-latitude oceans show widely diverging trends, with some broadly tracking the atmosphere and others suggesting extreme depletions. These discrepancies cloud our understanding of the deglacial carbon cycle because of the diversity of hypotheses needed to explain these diverging records, for example, injections of 14C-dead geological carbon, mixing of extremely isolated waters from the abyssal ocean or changes in sites of deep-water ventilation. Here we present absolutely dated deglacial deep-sea coral 14C records of intermediate waters from the Galápagos Platform—close to the largest reported deglacial 14C depletions—together with data from the low-latitude Atlantic. Our records indicate coherent, well-equilibrated intermediate-water 14C ventilation in both oceans relative to the atmosphere throughout the deglaciation. |
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