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

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

doi:https://doi.org/10.5194/bg-21-3985-2024

Articles | Volume 21, issue 17

https://doi.org/10.5194/bg-21-3985-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-21-3985-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 17

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

Supplement

https://doi.org/10.5194/bg-21-3985-2024-supplement

Data sets

WCRP Coupled Model Intercomparison Project (Phase 6) ESGF https://esgf-node.llnl.gov/search/cmip6/

Model code and software

FabriFalasca/delta-MAPS: d-MAPS Java (v1.0) F. Falasca https://doi.org/10.5281/zenodo.7320415

NonLinear_TimeSeries_Analysis F. Falasca https://github.com/FabriFalasca/NonLinear_TimeSeries_Analysis

superlju/IPVO2hotspots: v1.0.0 (v1.0.0) N. Ljuba https://doi.org/10.5281/zenodo.13294400

eofs: A library for eof analysis of meteorological, oceanographic, and climate data (https://ajdawson.github.io/eofs/latest/api/eofs.standard.html) A. Dawson https://doi.org/10.5334/jors.122

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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.