Bach et al. (2023): Toward a consensus framework to evaluate air–sea CO2 equilibration for marine CO2 removal

Lennart T. Bach, David T. Ho, Philip W. Boyd, Michael D. Tyka IN: Limnology and Oceanography Letters, https://doi.org/10.1002/lol2.10330,

For CDR to be realized, CO₂ must be absorbed by seawater after the deployment of a marine CDR method. However, equilibration with atmospheric CO₂ takes months to years and occurs over vast ocean regions, which raises concerns about whether the atmospheric CO₂ influx can be robustly verified. Here, the authors suggest a “risk assessment for incomplete CO₂ equilibration” as a pragmatic way to satisfy verification requirements. They illustrate the possible resources required for such a risk assessment, propose potential verification standards, and discuss research needs. The Essay seeks to stimulate debate on how marine scientists can contribute to shaping and improving a potentially nascent marine CDR economy.

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