Climate of the Past
Climate of the Past
Climate of the Past
Articles | Volume 17, issue 5
Articles | Volume 17, issue 5
Clim. Past, 17, 2273–2289, 2021
https://doi.org/10.5194/cp-17-2273-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Clim. Past, 17, 2273–2289, 2021
https://doi.org/10.5194/cp-17-2273-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 5

Research article 27 Oct 2021

Research article | 27 Oct 2021

Evolution of mean ocean temperature in Marine Isotope Stage 4

Sarah Shackleton et al.

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Latest update: 16 Jan 2022
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Short summary
In this study, we measure atmospheric noble gases trapped in ice cores to reconstruct ocean temperature during the last glaciation. Comparing the new reconstruction to other climate records, we show that the ocean reached its coldest temperatures before ice sheets reached maximum volumes and atmospheric CO2 reached its lowest concentrations. Ocean cooling played a major role in lowering atmospheric CO2 early in the glaciation, but it only played a minor role later.
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