Implementation and assessment of a model including mixotrophs and the carbonate cycle (Eco3M_MIX-CarbOx v1.0) in a highly dynamic Mediterranean coastal environment (Bay of Marseille, France) – Part 2: Towards a better representation of total alkalinity when modeling the carbonate system and air–sea CO<sub>2</sub> fluxes

Barré, Lucille; Diaz, Frédéric; Wagener, Thibaut; Mazoyer, Camille; Yohia, Christophe; Pinazo, Christel

doi:https://doi.org/10.5194/gmd-17-5851-2024

Articles | Volume 17, issue 15

https://doi.org/10.5194/gmd-17-5851-2024

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

https://doi.org/10.5194/gmd-17-5851-2024

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

Articles | Volume 17, issue 15

Model description paper

|

05 Aug 2024

Model description paper |

| 05 Aug 2024

Implementation and assessment of a model including mixotrophs and the carbonate cycle (Eco3M_MIX-CarbOx v1.0) in a highly dynamic Mediterranean coastal environment (Bay of Marseille, France) – Part 2: Towards a better representation of total alkalinity when modeling the carbonate system and air–sea CO₂ fluxes

Lucille Barré, Frédéric Diaz, Thibaut Wagener, Camille Mazoyer, Christophe Yohia, and Christel Pinazo

Supplement

https://doi.org/10.5194/gmd-17-5851-2024-supplement

Data sets

Oceanic carbonate chemistry measurements from discret samples collected at the SOLEMIO station (Bay of Marseille - North western Mediterannean Sea) between 2016 and 2019 C. Wimart-Rousseau et al. https://doi.org/10.17882/72356

Données de température à la station Planier-Souquet (5 m) D. Guillemain https://t-mednet.org/request-data

Panache du Rhône: Suivi des eaux du Rhône en zone côtière par mesure haute fréquence de la salinité de surface F. Garcia and P. Raimbault https://doi.org/10.34930/79C421C5-9335-4957-88FA-804FB4AE4B43

Aix-Marseille Carbon Pilot Study (AMC) I. Xueref-Remy et al. https://www.otmed.fr/research-projects-and-results/result-2449

Model code and software

Eco3M_MIX-CarbOx (v1.0) Lucille Barré et al. https://doi.org/10.5281/zenodo.7669658

Short summary

The carbonate system is typically studied using measurements, but modeling can contribute valuable insights. Using a biogeochemical model, we propose a new representation of total alkalinity, dissolved inorganic carbon, pCO_2, and pH in a highly dynamic Mediterranean coastal area, the Bay of Marseille, a useful addition to measurements. Through a detailed analysis of pCO₂ and air–sea CO₂ fluxes, we show that variations are strongly impacted by the hydrodynamic processes that affect the bay.