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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Subject: Carbon Cycle | Archive: Modelling only | Timescale: Pleistocene
Assessing transient changes in the ocean carbon cycle during the last deglaciation through carbon isotope modeling
Marine carbon cycle response to a warmer Southern Ocean: the case of the last interglacial
Local oceanic CO2 outgassing triggered by terrestrial carbon fluxes during deglacial flooding
Coupled climate–carbon cycle simulation of the Last Glacial Maximum atmospheric CO2 decrease using a large ensemble of modern plausible parameter sets
Long-term deglacial permafrost carbon dynamics in MPI-ESM
The simulated climate of the Last Glacial Maximum and insights into the global marine carbon cycle
Quantifying the ocean's role in glacial CO2 reductions
A multi-variable box model approach to the soft tissue carbon pump
Hidetaka Kobayashi, Akira Oka, Takashi Obase, and Ayako Abe-Ouchi
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This study examines the transient response of the ocean carbon cycle to climate change since the last ice age by using an ocean general circulation model. Our carbon cycle model calculates atmospheric pCO2 changes that are consistent with ice core records but whose magnitude is underestimated. Our analysis of carbon isotopes suggests that improving the expression of activated ocean ventilation and suppressing biological productivity are critical in simulating atmospheric pCO2 changes.
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Krista M. S. Kemppinen, Philip B. Holden, Neil R. Edwards, Andy Ridgwell, and Andrew D. Friend
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We simulate the Last Glacial Maximum atmospheric CO2 decrease with a large ensemble of parameter sets to investigate the range of possible physical and biogeochemical Earth system changes accompanying the CO2 decrease. Amongst the dominant ensemble changes is an increase in terrestrial carbon, which we attribute to a slower soil respiration rate, and the preservation of carbon by the LGM ice sheets. Further investigation into the role of terrestrial carbon is warranted.
Thomas Schneider von Deimling, Thomas Kleinen, Gustaf Hugelius, Christian Knoblauch, Christian Beer, and Victor Brovkin
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M. O. Chikamoto, A. Abe-Ouchi, A. Oka, R. Ohgaito, and A. Timmermann
Clim. Past, 8, 545–563, https://doi.org/10.5194/cp-8-545-2012, https://doi.org/10.5194/cp-8-545-2012, 2012
A. M. de Boer, A. J. Watson, N. R. Edwards, and K. I. C. Oliver
Clim. Past, 6, 827–841, https://doi.org/10.5194/cp-6-827-2010, https://doi.org/10.5194/cp-6-827-2010, 2010
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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,...
