Articles | Volume 21, issue 17
https://doi.org/10.5194/bg-21-3985-2024
https://doi.org/10.5194/bg-21-3985-2024
Research article
 | 
13 Sep 2024
Research article |  | 13 Sep 2024

Evolution of oxygen and stratification and their relationship in the North Pacific Ocean in CMIP6 Earth system models

Lyuba Novi, Annalisa Bracco, Takamitsu Ito, and Yohei Takano

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Cited articles

Abe, Y. and Minobe, S.: Comparison of ocean deoxygenation between CMIP models and an observational dataset in the North Pacific from 1958 to 2005, Front. Mar. Sci., 10, 1161451, https://doi.org/10.3389/fmars.2023.1161451, 2023. 
Balmaseda, M. A., Mogensen, K., and Weaver, A. T.: Evaluation of the ECMWF ocean reanalysis system ORAS4, Q. J. Roy. Meteor. Soc., 139, 1132–1161, https://doi.org/10.1002/qj.2063, 2012. 
Béal, D., Brasseur, P., Brankart, J.-M., Ourmières, Y., and Verron, J.: Characterization of mixing errors in a coupled physical biogeochemical model of the North Atlantic: implications for nonlinear estimation using Gaussian anamorphosis, Ocean Sci., 6, 247–262, https://doi.org/10.5194/os-6-247-2010, 2010. 
Beobide-Arsuaga, G., Bayr, T., Reintges, A., and Latif, M.: Uncertainty of ENSO-amplitude projections in CMIP5 and CMIP6 models, Clim. Dynam., 56, 3875–3888, https://doi.org/10.1007/s00382-021-05673-4, 2021. 
Bindoff, N. L., Cheung, W. W. L., Kairo, J. G., Arístegui, J., Guinder, V. A., Hallberg, R., Hilmi, N., Jiao, N., Karim, M. D., Levin, L., O'Donoghue, S. H., Purca, S., Rinkevich, B., Suga, T., Tagliabue, A., Williamson, P.: Changing Ocean, Marine Ecosystems, and Dependent Communities, Cambridge, UK and New York, NY, USA, https://doi.org/10.1017/9781009157964.007, 2019. 
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Short summary
We explored the relationship between oxygen and stratification in the North Pacific Ocean using a combination of data mining and machine learning. We used isopycnic potential vorticity (IPV) as an indicator to quantify ocean ventilation and analyzed its predictability, a strong O2–IPV connection, and predictability for IPV in the tropical Pacific. This opens new routes for monitoring ocean O2 through few observational sites co-located with more abundant IPV measurements in the tropical Pacific.
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