Oschlies, Andreas , Bach, Lennart T. , Rickaby, Rosalind, Satterfield, Terre, Webb, Romany M. and Gattuso, Jean-Pierre (2023) Climate targets, carbon dioxide removal and the potential role of Ocean Alkalinity Enhancement. State Planet : SP, 2-oae2023 (Chaper 1). pp. 1-9. DOI 10.5194/sp-2-oae2023-1-2023.

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Abstract

The Paris Agreement to limit global warming to well below 2 °C requires ambitious emission reduction and the balancing of remaining emissions through carbon sinks, i.e. the deployment of carbon dioxide removal (CDR). While ambitious climate protection scenarios until now consider primarily land-based CDR methods, there is growing concern about their potential to deliver sufficient CDR, and marine CDR options receive more and more interest. Based on idealized theoretical studies, Ocean Alkalinity Enhancement (OAE) appears as a promising marine CDR method. However, the knowledge base is insufficient for a robust assessment of its practical feasibility, of its side effects, social and governance aspects as well as monitoring, reporting and verification issues. A number of research efforts aim to improve this in a timely manner. We provide an overview on the current situation of developing OAE as marine CDR method, and describe the history that has led to the creation of the OAE research Best Practices Guide.

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