Articles | Volume 17, issue 1
https://doi.org/10.5194/cp-17-171-2021
https://doi.org/10.5194/cp-17-171-2021
Research article
 | 
15 Jan 2021
Research article |  | 15 Jan 2021

Sequential changes in ocean circulation and biological export productivity during the last glacial–interglacial cycle: a model–data study

Cameron M. O'Neill, Andrew McC. Hogg, Michael J. Ellwood, Bradley N. Opdyke, and Stephen M. Eggins

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Short summary
We undertake a model–data study of the last glacial–interglacial cycle of atmospheric CO2, spanning 0–130 ka. We apply a carbon cycle box model, constrained with glacial–interglacial observations, and solve for optimal model parameter values against atmospheric and ocean proxy data. The results indicate that the last glacial drawdown in atmospheric CO2 was delivered mainly by slowing ocean circulation, lower sea surface temperatures and also increased Southern Ocean biological productivity.