Bach et al. (2024): Implementation of marine CO2 removal for climate mitigation: The challenges of additionality, predictability, and governability
Lennart T. Bach, Naomi E. Vaughan, Cliff S. Law, Phillip Williamson IN: Science of the Anthropocene 12 (1), 00034, https://doi.org/10.1525/elementa.2023.00034
The most widely considered mCDR methods are coastal blue carbon and seaweed farming that primarily depend on biological manipulations; ocean iron fertilisation, ocean alkalinity enhancement, and direct ocean capture that depend on chemical manipulations; and artificial upwelling that depends on physical manipulation of the ocean system. It is currently highly uncertain which, if any, of these approaches might be implemented at sufficient scale to make a meaningful contribution to net zero. In this paper a framework based on additionality, predictability, and governability to assess implementation challenges for these mCDR methods is derived.