Ocean Oxygen

Less oxygen in a warmer ocean

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Science  02 Jun 2017:
Vol. 356, Issue 6341, pp. 919-920
DOI: 10.1126/science.356.6341.919-g

Climate warming should decrease the concentration of dissolved oxygen (O2) in the surface ocean, for a variety of reasons. This trend, predicted on theoretical grounds and by ocean models, has been difficult to detect within the much greater range of natural variability, though. Ito et al. analyzed existing measurements of O2 in the ocean collected from 1958 to 2015, and they report that a widespread negative O2 trend has begun to emerge. Further work will be needed to understand which mechanisms are responsible for the global and regional trends, however.

Geophys. Res. Lett. 10.1002/2017GL073613 (2017).

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