Articles | Volume 17, issue 1
https://doi.org/10.5194/cp-17-171-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-17-171-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
15 Jan 2021
Research article |
| 15 Jan 2021
| 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
CORRESPONDING AUTHOR
Research School of Earth Sciences, Australian National University, Canberra, Australia
Andrew McC. Hogg
Research School of Earth Sciences, Australian National University, Canberra, Australia
ARC Centre of Excellence for Climate Extremes, Australian National University, Canberra, Australia
Michael J. Ellwood
Research School of Earth Sciences, Australian National University, Canberra, Australia
Bradley N. Opdyke
Research School of Earth Sciences, Australian National University, Canberra, Australia
Stephen M. Eggins
Research School of Earth Sciences, Australian National University, Canberra, Australia
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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.
We undertake a model–data study of the last glacial–interglacial cycle of atmospheric CO2,...
