Articles | Volume 15, issue 23
https://doi.org/10.5194/bg-15-7111-2018
https://doi.org/10.5194/bg-15-7111-2018
Research article
 | 
29 Nov 2018
Research article |  | 29 Nov 2018

Pacific Decadal Oscillation and recent oxygen decline in the eastern tropical Pacific Ocean

Olaf Duteil, Andreas Oschlies, and Claus W. Böning

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Short summary
Oxygen-depleted regions of the Pacific Ocean are currently expanding, which is threatening marine habitats. Based on numerical simulations, we show that the decrease in the intensity of the trade winds and the subsequent slowdown of the oceanic currents lead to a reduction in oxygen supply. Our study suggests that the prevailing positive conditions of the Pacific Decadal Oscillation since 1975, a major source of natural variability, may explain a significant part of the current deoxygenation.
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