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Annual Review of Marine Science

Volume 17, 2025

The Science, Engineering, and Validation of Marine Carbon Dioxide Removal and Storage

Abstract

Scenarios to stabilize global climate and meet international climate agreements require rapid reductions in human carbon dioxide (CO) emissions, often augmented by substantial carbon dioxide removal (CDR) from the atmosphere. While some ocean-based removal techniques show potential promise as part of a broader CDR and decarbonization portfolio, no marine approach is ready yet for deployment at scale because of gaps in both scientific and engineering knowledge. Marine CDR spans a wide range of biotic and abiotic methods, with both common and technique-specific limitations. Further targeted research is needed on CDR efficacy, permanence, and additionality as well as on robust validation methods—measurement, monitoring, reporting, and verification—that are essential to demonstrate the safe removal and long-term storage of CO. Engineering studies are needed on constraints including scalability, costs, resource inputs, energy demands, and technical readiness. Research on possible co-benefits, ocean acidification effects, environmental and social impacts, and governance is also required.

Keyword(s): climate mitigation, decarbonization, monitoring, ocean acidification, ocean biogeochemistry, reporting and verification
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/content/journals/10.1146/annurev-marine-040523-014702
2025-01-16
2025-05-16
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The Science, Engineering, and Validation of Marine Carbon Dioxide Removal and Storage
Annual Review of Marine Science 17, 55 (2025); https://doi.org/10.1146/annurev-marine-040523-014702
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