Impacts of simulated coastal ocean alkalinity enhancement on the seasonal carbon cycle in European waters under a low- and a high-emission scenario

Ciscato, Chiara; Mehendale, Neha; Kemena, Tronje P.; Avrutin, Sandy; Keller, David P.

doi:10.5194/esd-17-1513-2026

Articles | Volume 17, issue 5

https://doi.org/10.5194/esd-17-1513-2026

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

https://doi.org/10.5194/esd-17-1513-2026

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

Articles | Volume 17, issue 5

Research article

|

07 Oct 2026

Research article |

| 07 Oct 2026

Impacts of simulated coastal ocean alkalinity enhancement on the seasonal carbon cycle in European waters under a low- and a high-emission scenario

Chiara Ciscato, Neha Mehendale, Tronje P. Kemena, Sandy Avrutin, and David P. Keller

Data sets

Datasets referring to the paper titled 'Impacts of Simulated Coastal Ocean Alkalinity Enhancement on the Seasonal Cycle of CO2 Air-Sea Gas Exchange and Ocean pCO2 in European Waters under Low- and High-Emission Scenarios' C. Ciscato https://doi.org/10.5281/zenodo.13935197

Interactive computing environment

Jupyter Notebooks referring to the paper titled 'Impacts of simulated coastal ocean alkalinity enhancement on the seasonal carbon cycle in European waters under a low- and a high-emission scenario' C. Ciscato https://doi.org/10.5281/zenodo.21874675

Short summary

Ocean Alkalinity Enhancement (OAE) is a marine carbon dioxide removal method with large-scale potential. Using an Earth System Model, we explored the effects of continuous coastal OAE application on the seasonal carbon cycle under low and high emissions. We found that stratification retains higher alkalinity over summer, reducing the ocean pCO2 and turning the region into a year-round carbon sink. Additionally, high emissions lower the ocean’s buffering capacity and increase winter CO2 uptake.