The Potential for Ocean-Based Climate Action: Negative Emissions Technologies and Beyond

Jean-Pierre Gattuso, Phillip Williamson, Carlos M. Duarte, Alexandre K. Magnan

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


The effectiveness, feasibility, duration of effects, co-benefits, disbenefits, cost effectiveness and governability of four ocean-based negative emissions technologies (NETs) are assessed in comparison to eight other ocean-based measures. Their role in revising UNFCCC Parties' future Nationally Determined Contributions is discussed in the broad context of ocean-based actions for both mitigation and ecological adaptation. All measures are clustered in three policy-relevant categories (Decisive, Low Regret, Concept Stage). None of the ocean-based NETs assessed are identified as Decisive at this stage. One is Low Regret (Restoring and increasing coastal vegetation), and three are at Concept Stage, one with low to moderate potential disbenefits (Marine bioenergy with carbon capture and storage) and two with potentially high disbenefits (Enhancing open-ocean productivity and Enhancing weathering and alkalinization). Ocean-based NETs are uncertain but potentially highly effective. They have high priority for research and development.
Original languageEnglish (US)
JournalFrontiers in Climate
StatePublished - Jan 25 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-02-23
Acknowledgements: Thanks are due to the coauthors of the papers by Gattuso et al. (2018) and Gattuso et al. (2019). This work is a product of The Ocean Solutions Initiative ( and the STORISK project ( Comments from L. Kapsenberg and three reviewers have significantly improved an earlier version of this paper.


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