Articles | Volume 13, issue 1
Biogeosciences, 13, 211–221, 2016
https://doi.org/10.5194/bg-13-211-2016

Special issue: Low oxygen environments in marine, fresh and estuarine...

Biogeosciences, 13, 211–221, 2016
https://doi.org/10.5194/bg-13-211-2016

Research article 15 Jan 2016

Research article | 15 Jan 2016

Millennial changes in North Atlantic oxygen concentrations

B. A. A. Hoogakker et al.

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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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