The efficiency and ocean acidification mitigation potential of ocean alkalinity enhancement on multi-centennial timescales

Grosselindemann, Hendrik; Burger, Friedrich A.; Frölicher, Thomas L.

doi:10.5194/bg-23-3299-2026

Articles | Volume 23, issue 10

https://doi.org/10.5194/bg-23-3299-2026

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

https://doi.org/10.5194/bg-23-3299-2026

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

Articles | Volume 23, issue 10

Research article

|

18 May 2026

Research article |

| 18 May 2026

The efficiency and ocean acidification mitigation potential of ocean alkalinity enhancement on multi-centennial timescales

Hendrik Grosselindemann, Friedrich A. Burger, and Thomas L. Frölicher

Data sets

Data and code for publication ``The efficiency and ocean acidification mitigation potential of ocean alkalinity enhancement on multi-centennial timescales'' Hendrik Grosselindemann https://doi.org/10.5281/zenodo.19706021

Model code and software

Data and code for publication ``The efficiency and ocean acidification mitigation potential of ocean alkalinity enhancement on multi-centennial timescales'' Hendrik Grosselindemann https://doi.org/10.5281/zenodo.19706021

Short summary

We assess the long-term carbon cycle, climate and ocean acidification response of ocean alkalinity enhancement (OAE) using an emission-driven Earth system model across warming stabilization scenarios. OAE lowers atmospheric CO₂ and produces a scenario-independent linear cooling. Gross carbon capture efficiency remains high, while net efficiencies decline over time due to carbon-cycle feedbacks. Ocean acidification mitigation by OAE is dominated by CO₂ drawdown on long timescales.