Articles | Volume 21, issue 11
https://doi.org/10.5194/bg-21-2705-2024
https://doi.org/10.5194/bg-21-2705-2024
Research article
 | 
05 Jun 2024
Research article |  | 05 Jun 2024

Ocean alkalinity enhancement using sodium carbonate salts does not lead to measurable changes in Fe dynamics in a mesocosm experiment

David González-Santana, María Segovia, Melchor González-Dávila, Librada Ramírez, Aridane G. González, Leonardo J. Pozzo-Pirotta, Veronica Arnone, Victor Vázquez, Ulf Riebesell, and J. Magdalena Santana-Casiano

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Cited articles

Anderson, M. A. and Morel, F. M. M.: The influence of aqueous iron chemistry on the uptake of iron by the coastal diatom Thalassiosira weissflogii, Limnol. Oceanogr., 27, 789–813, https://doi.org/10.4319/lo.1982.27.5.0789, 1982. 
Arnone, V., González-Santana, D., González-Dávila, M., González, A. G., and Santana-Casiano, J. M.: Iron and copper complexation in Macaronesian coastal waters, Mar. Chem., 240, 104087, https://doi.org/10.1016/J.MARCHEM.2022.104087, 2022. 
Arreguin, M. L., González, A. G., Pérez-Almeida, N., Arnone, V., González-Dávila, M., and Santana-Casiano, J. M.: The role of gentisic acid on the Fe(III) redox chemistry in marine environments, Mar. Chem., 234, 104003, https://doi.org/10.1016/J.MARCHEM.2021.104003, 2021. 
Bach, L. T., Gill, S. J., Rickaby, R. E. M., Gore, S., and Renforth, P.: CO2 Removal With Enhanced Weathering and Ocean Alkalinity Enhancement: Potential Risks and Co-benefits for Marine Pelagic Ecosystems, Front. Clim., 1, 476698, https://doi.org/10.3389/FCLIM.2019.00007/BIBTEX, 2019. 
Barbeau, K.: Photochemistry of Organic Iron(III) Complexing Ligands in Oceanic Systems, Photochem. Photobiol., 82, 1505–1516, https://doi.org/10.1111/j.1751-1097.2006.tb09806.x, 2006. 
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Short summary
In a recent experiment off the coast of Gran Canaria (Spain), scientists explored a method called ocean alkalinization enhancement (OAE), where carbonate minerals were added to seawater. This process changed the levels of certain ions in the water, affecting its pH and buffering capacity. The researchers were particularly interested in how this could impact the levels of essential trace metals in the water.
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