Biogeosciences
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Articles | Volume 13, issue 1
Articles | Volume 13, issue 1
https://doi.org/10.5194/bg-13-211-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/bg-13-211-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 13, issue 1
Research article
 | 
15 Jan 2016
Research article |  | 15 Jan 2016

Millennial changes in North Atlantic oxygen concentrations

B. A. A. Hoogakker, D. J. R. Thornalley, and S. Barker

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Short summary
Models predict a decrease in future ocean O2, driven by surface water warming and freshening in the polar regions, causing a reduction in ocean circulation. Here we assess this effect in the past, focussing on the response of deep and intermediate waters from the North Atlantic during large-scale ice rafting and millennial-scale cooling events of the last glacial. Our assessment agrees with the models but also highlights the importance of biological processes driving ocean O2 change.
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