Acksen et al. (2026): Influence of Deep-Sea Carbonate Sediments on the Durability of Carbon Storage from Ocean Alkalinity Enhancement
Sina Acksen, Wolfgang Koeve, Markus Pahlow, Christopher J. Somes, and Andreas Oschlies, IN: ESS Open Archive, https://doi.org/10.22541/essoar.15001952/v1
Ocean Alkalinity Enhancement (OAE) is a marine carbon dioxide removal strategy with a theoretical sequestration potential of 3–30 Gt CO₂ yr⁻¹. The durability of OAE-induced carbon storage depends on the persistence of the added alkalinity in the ocean, which is influenced by sedimentary processes, terrestrial weathering, and biological and physical feedbacks. Using the UVic v2.10 Earth System Model of intermediate complexity, the authors investigated the millennial-scale durability of OAE-induced carbon storage and the role of deep-sea calcium carbonate sediments.