Articles | Volume 21, issue 20
https://doi.org/10.5194/bg-21-4587-2024
https://doi.org/10.5194/bg-21-4587-2024
Research article
 | 
23 Oct 2024
Research article |  | 23 Oct 2024

Ocean alkalinity enhancement approaches and the predictability of runaway precipitation processes: results of an experimental study to determine critical alkalinity ranges for safe and sustainable application scenarios

Niels Suitner, Giulia Faucher, Carl Lim, Julieta Schneider, Charly A. Moras, Ulf Riebesell, and Jens Hartmann

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Cited articles

Aloisi, G., Gloter, A., Krüger, M., Wallmann, K., Guyot, F., and Zuddas, P.: Nucleation of calcium carbonate on bacterial nanoglobules, Geology, 34, 1017–1020, https://doi.org/10.1130/g22986a.1, 2006. 
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, Frontiers in Climate, 1, 1038, https://doi.org/10.3389/fclim.2019.00007, 2019. 
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Short summary
Recent studies described the precipitation of carbonates as a result of alkalinity enhancement in seawater, which could adversely affect the carbon sequestration potential of ocean alkalinity enhancement (OAE) approaches. By conducting experiments in natural seawater, this study observed uniform patterns during the triggered runaway carbonate precipitation, which allow the prediction of safe and efficient local application levels of OAE scenarios.
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