Evaluation of the particulate inorganic carbon export efficiency in the global ocean

Toullec, Jordan

doi:10.5194/bg-23-4361-2026

Articles | Volume 23, issue 12

https://doi.org/10.5194/bg-23-4361-2026

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

https://doi.org/10.5194/bg-23-4361-2026

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

Articles | Volume 23, issue 12

Research article

|

01 Jul 2026

Research article |

| 01 Jul 2026

Evaluation of the particulate inorganic carbon export efficiency in the global ocean

Jordan Toullec

Supplement

https://doi.org/10.5194/bg-23-4361-2026-supplement

Data sets

JordanToullec/EGUSPHERE-2025-1108_Datasets: EGUSPHERE-2025-4395_Datasets (EGUSPHERE-2025-4395-Dataset) Jordan Toullec https://doi.org/10.5281/zenodo.21033101

Model code and software

JordanToullec/egusphere-2025-1108_script: EGUSPHERE-2025-4395-Script (EGUSPHERE-2025-4395-Script) Jordan Toullec https://doi.org/10.5281/zenodo.21033186

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Short summary

The gravitational sinking of calcifying plankton (CaCO₃ shell) participates in capturing CO₂ in the ocean. This work reveals that plankton seasonality and regional differences are important drivers of CaCO₃ flux efficiency. CaCO₃ dissolution in the water column is assumed to be responsible for this discrepancy. This study suggests that the type of sinking particles (marine snow aggregates, zooplankton fecal pellets) and the plankton phenology may affect the CaCO₃ export efficiency.