Ocean CDR: what would make MRV credible enough?

Ocean CDR has enormous physical capacity and a much harder trust problem. The chemistry can be clear while the accounting stays messy.

For the broad landscape, Lee et al. is a strong recent review: doi:10.1021/acs.chemrev.5c00433. Ho et al. is useful on OAE monitoring and verification: doi:10.5194/sp-2-oae2023-12-2023. Zhou et al. is a good reminder that efficiency varies by location: doi:10.1038/s41558-024-02179-9.

What would make you comfortable calling an ocean alkalinity project a measured removal rather than a modelled intervention?