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This research aims to investigate how the Southern Ocean contributed to past increases in atmospheric CO2 during deglaciation.

May 27, 2010ScienceOpen Access

Ventilation of the Deep Southern Ocean and Deglacial CO ₂ Rise

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This research aims to investigate how the Southern Ocean contributed to past increases in atmospheric CO2 during deglaciation.
Radiocarbon dating of deep sea water samples from the Atlantic sector of the Southern Ocean.
Comparison of deep water ages relative to present atmospheric CO2 levels.
Analysis of the Antarctic overturning circulation and its effects on atmospheric CO2.
Deep water around Antarctica during the last glacial period was over twice as old as today relative to the atmosphere.
The release of CO2 from this old deep water significantly influenced atmospheric CO2 concentrations during deglaciation.
Old, CO2-enriched deep water contributed to the variability in atmospheric CO2 rise by affecting the upwelling branch of the overturning circulation.

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Randomized trial evaluates CO2 rises in atmosphere during deglaciation, indicating oceanic influences.

Skinner et al. (2010) studied this question.

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