Articles | Volume 17, issue 5
https://doi.org/10.5194/os-17-1489-2021
https://doi.org/10.5194/os-17-1489-2021
Research article
 | 
27 Oct 2021
Research article |  | 27 Oct 2021

The riddle of eastern tropical Pacific Ocean oxygen levels: the role of the supply by intermediate-depth waters

Olaf Duteil, Ivy Frenger, and Julia Getzlaff

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Cited articles

Ascani, F., Firing, E., Dutrieux, P., McCreary, J. P., and Ishida, A.: Deep Equatorial Ocean Circulation Induced by a Forced–Dissipated Yanai Beam, J. Phys. Oceanogr., 40, 1118–1142, https://doi.org/10.1175/2010jpo4356.1, 2010. 
Ascani, F., Firing, E., McCreary, J. P., Brandt, P., and Greatbatch, R. J.: The Deep Equatorial Ocean Circulation in Wind-Forced Numerical Solutions, J. Phys. Oceanogr., 45, 1709–1734, https://doi.org/10.1175/jpo-d-14-0171.1, 2015. 
Bahl, A., Gnanadesikan, A., and Pradal, M. A.: Variations in Ocean Deoxygenation Across Earth System Models: Isolating the Role of Parameterized Lateral Mixing, Global Biogeochem. Cy., 33, 703–724, https://doi.org/10.1029/2018gb006121, 2019. 
Blanke, B. and Grima, N.: ARIANE software for tracking particles [code], available at: http://stockage.univ-brest.fr/~grima/Ariane/ariane.html, last access: 14 October 2021. 
Blanke, B. and Raynaud, S.: Kinematics of the Pacific Equatorial Undercurrent: An Eulerian and Lagrangian Approach from GCM Results, J. Phys. Oceanogr., 27, 1038–1053, https://doi.org/10.1175/1520-0485(1997)027<1038:kotpeu>2.0.co;2, 1997. 
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Short summary
The large oxygen minimum zones in the tropical Pacific Ocean are still not well represented by typical climate models. We analyze a set of ocean models and highlight the fact that an oxygen concentration that is too low at intermediate depth in the subtropical regions associated with a sluggish representation of the intermediate equatorial current system may be responsible for the overly large extension of the modeled oxygen minimum zones, potentially hampering future projections.