Deep-sea acidity data combined with ice-core carbon dioxide records reveal that an interplay between the two polar regions modulates ocean ventilation through various modes. These modes explain past variations in deep-sea carbon storage and atmospheric carbon dioxide on millennial timescales.
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This is a summary of: Yu, J. et al. Millennial atmospheric CO2 changes linked to ocean ventilation modes over past 150,000 years. Nat. Geosci. https://doi.org/10.1038/s41561-023-01297-x (2023).
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Bipolar control on changes in atmospheric carbon dioxide over millennial timescales. Nat. Geosci. 16, 1084–1085 (2023). https://doi.org/10.1038/s41561-023-01329-6
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DOI: https://doi.org/10.1038/s41561-023-01329-6