Climate of the Past
Climate of the Past
CP
Articles | Volume 17, issue 5
Articles | Volume 17, issue 5
https://doi.org/10.5194/cp-17-2255-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-17-2255-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 5
Research article
 | 
26 Oct 2021
Research article |  | 26 Oct 2021

Southern Ocean bottom-water cooling and ice sheet expansion during the middle Miocene climate transition

Thomas J. Leutert, Sevasti Modestou, Stefano M. Bernasconi, and A. Nele Meckler

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Short summary
The Miocene climatic optimum associated with high atmospheric CO2 levels (~17–14 Ma) was followed by a period of dramatic climate change. We present a clumped isotope-based bottom-water temperature record from the Southern Ocean covering this key climate transition. Our record reveals warm conditions and a substantial cooling preceding the main ice volume increase, possibly caused by thresholds involved in ice growth and/or regional effects at our study site.
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