Kanzaki et al. (2023): New estimates of the storage permanence and ocean co-benefits of enhanced rock weathering

Yoshiki Kanzaki, Noah J Planavsky, Christopher T Reinhard IN: PNAS Nexus, Vol 2 (4), https://doi.org/10.1093/pnasnexus/pgad059

The authors use an ensemble of Earth system models to provide new insights into the efficiency of CDR through enhanced rock weathering (ERW) by explicitly quantifying long-term storage of carbon in the ocean during ERW relative to an equivalent modulated emissions scenario. They find that although the backflux of CO₂ to the atmosphere in the face of CDR is in all cases significant and time-varying, even for direct removal and underground storage, the leakage of initially captured carbon associated with ERW is well below that currently assumed.

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