Biogeosciences
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Articles | Volume 20, issue 18
Articles | Volume 20, issue 18
https://doi.org/10.5194/bg-20-3717-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-20-3717-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 18
Research article
 | 
15 Sep 2023
Research article |  | 15 Sep 2023

Alkalinity biases in CMIP6 Earth system models and implications for simulated CO2 drawdown via artificial alkalinity enhancement

Claudia Hinrichs, Peter Köhler, Christoph Völker, and Judith Hauck

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Latest update: 03 Nov 2025
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Short summary
This study evaluated the alkalinity distribution in 14 climate models and found that most models underestimate alkalinity at the surface and overestimate it in the deeper ocean. It highlights the need for better understanding and quantification of processes driving alkalinity distribution and calcium carbonate dissolution and the importance of accounting for biases in model results when evaluating potential ocean alkalinity enhancement experiments.
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