Including the triple isotopic composition of dissolved  oxygen in the ocean into the iLOVECLIM model  (version 1.1.7): development and evaluation

Clermont, Emeline; Yang, Ji-Woong; Extier, Thomas; Roche, Didier M.

doi:10.5194/gmd-19-10203-2026

Articles | Volume 19, issue 20

https://doi.org/10.5194/gmd-19-10203-2026

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

Special issue:

The iLOVECLIM earth system model

https://doi.org/10.5194/gmd-19-10203-2026

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

Articles | Volume 19, issue 20

Development and technical paper

|

27 Oct 2026

Development and technical paper |

| 27 Oct 2026

Including the triple isotopic composition of dissolved oxygen in the ocean into the iLOVECLIM model (version 1.1.7): development and evaluation

Emeline Clermont, Ji-Woong Yang, Thomas Extier, and Didier M. Roche

Data sets

Argo float data and metadata from Global Data Assembly Centre (Argo GDAC) Argo https://doi.org/10.17882/42182

Depth profiles of dissolved O2 saturation and isotopologues from the R/V Yellowfin and R/V Kilo Moana from 2016-09-14 to 2017-08-28 Huanting Hu et al. https://doi.org/10.1575/1912/bco-dmo.753594.1

Model code and software

iLOVECLIM source code (version 1.1.7) Emeline Clermont and Didier M. Roche https://doi.org/10.5281/zenodo.17379487

Model outputs: oxygen, oxygen isotopes and gross primary productivity of oxygen (iLOVECLIM v1.1.7) Emeline Clermont https://doi.org/10.5281/zenodo.17379193

Short summary

The triple isotopic composition of atmospheric oxygen (¹⁷Δ) is used to reconstruct past global biospheric productivity. We present the first implementation of the oceanic contribution (¹⁷Δ_ocean) in the intermediate-complexity model iLOVECLIM. Photosynthesis, respiration, and air–sea gas exchange are represented under preindustrial conditions. Model results agree with observations, providing a future key tool to study marine biogeochemical processes and past ocean biospheric productivity.