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Deep-Sea Oxygen Depletion and Ocean Carbon Sequestration During the Last Ice Age

Anderson, Robert F.; Sachs, Julian; Fleisher, Martin Q.; Allen, Katherine A.; Yu, Jimin; Koutavas, Athanasios; Jaccard, Samuel


Enhanced ocean carbon storage during the Pleistocene ice ages lowered atmospheric CO2 concentrations by 80 to 100 ppm relative to interglacial levels. Leading hypotheses to explain this phenomenon invoke a greater efficiency of the ocean's biological pump, in which case carbon storage in the deep sea would have been accompanied by a corresponding reduction in dissolved oxygen. We exploit the sensitivity of organic matter preservation in marine sediments to bottom water oxygen concentration to...[Show more]

CollectionsANU Research Publications
Date published: 2019-03-13
Type: Journal article
Source: Global Biogeochemical Cycles
DOI: 10.1029/2018GB006049


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