Global climate and the atmospheric partial pressure of carbon dioxide (pCO2atm ) are correlated over recent glacial cycles, with lower pCO2atm during ice ages, but the causes of the pCO2atm changes are unknown. The modern Southern Ocean releases deeply sequestered CO2 to the atmosphere.

Global climate and the atmospheric partial pressure of carbon dioxide (pCO2atm ) are correlated over recent glacial cycles, with lower pCO2atm during ice ages, but the causes of the pCO2atm changes are unknown. The modern Southern Ocean releases deeply sequestered CO2 to the atmosphere.