Pasquier et al. (2025): The Sequestration Efficiency of the Deep Ocean

Benoît Pasquier, Richard J. Matear, Matthew A. Chamberlain, Tilo Ziehn, David K. Hutchinson, François W. Primeau, Yi Liu, Ann Bardin, IN: Geophysical Research Letters, https://doi.org/10.1029/2025GL116799

The abyssal ocean may provide adequate sequestration for Carbon Capture and Storage and Carbon Dioxide Removal. The transit of carbon from seafloor release to ocean surface can take millennia, as it occurs through many water pathways characterized by long-tailed transit-time distributions (TTDs). However, multi-millennial simulations of TTDs are typically prohibitively expensive. Here, the authors introduce an idealized but computationally efficient methodological framework for computing TTDs offline from climate-model archives. They applied this framework to one Earth System Model to estimate the deep ocean sequestration efficiency for the 2030s and 2090s ocean circulations.

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