Climate of the Past
Climate of the Past
CP
Articles | Volume 18, issue 3
Articles | Volume 18, issue 3
https://doi.org/10.5194/cp-18-435-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-18-435-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 3
Research article
 | 
04 Mar 2022
Research article |  | 04 Mar 2022

Clumped isotope evidence for Early Jurassic extreme polar warmth and high climate sensitivity

Thomas Letulle, Guillaume Suan, Mathieu Daëron, Mikhail Rogov, Christophe Lécuyer, Arnauld Vinçon-Laugier, Bruno Reynard, Gilles Montagnac, Oleg Lutikov, and Jan Schlögl

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Short summary
In this study, we applied geochemical tools to well-preserved ∼180-million-year-old marine mollusc shells from polar and mid-latitude seas. These results indicate that polar shells grew at temperatures of 8–18°C, while mid-latitude shells grew at temperatures of 24–28°C. These results, together with previously published data, raise concerns about the ability of climate models to predict accurate polar temperatures under reasonably high atmospheric CO2 levels.
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