Divergent sensitivities of apparent oxygen utilization to ventilation changes in the deep ocean across Earth system models

Couespel, Damien; Davila, Xabier; Goris, Nadine; Jeansson, Emil; Lauvset, Siv K.; Tjiputra, Jerry

doi:10.5194/bg-23-3433-2026

Articles | Volume 23, issue 10

https://doi.org/10.5194/bg-23-3433-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-23-3433-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 10

Research article

|

21 May 2026

Research article |

| 21 May 2026

Divergent sensitivities of apparent oxygen utilization to ventilation changes in the deep ocean across Earth system models

Damien Couespel, Xabier Davila, Nadine Goris, Emil Jeansson, Siv K. Lauvset, and Jerry Tjiputra

Data sets

Water Mass Ages Based on GLODAPv2 Data Product (NCEI Accession 0226793) E. Jeansson et al. https://doi.org/10.25921/xp33-q351

Global Ocean Data Analysis Project, Version 2 (GLODAPv2) (NCEI Accession 0162565), Version 2 A. Olsen et al. https://doi.org/10.7289/v5kw5d97

Model code and software

Divergent Sensitivities of Apparent Oxygen Utilization to Ventilation Changes in the Deep Ocean Across Earth System Models: jupyter notebooks D. Couespel https://doi.org/10.5281/zenodo.20271993

Short summary

Remineralised carbon storage is projected to increase along the 21st century, but the magnitude of increase varies depending on the Earth system models. To constrain projections, we explore the relationship between remineralised carbon and deep ocean circulation. We show that the sensitivity of remineralised carbon to circulation slowdown varies considerably between models. More observational data and a larger model ensemble is needed to constrain projections of remineralised carbon storage.