Articles | Volume 21, issue 11
https://doi.org/10.5194/cp-21-1981-2025
© Author(s) 2025. 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-21-1981-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
05 Nov 2025
Research article |
| 05 Nov 2025
| 05 Nov 2025
Estimating breakpoints in the Cenozoic Era: an econometric approach
Mikkel Bennedsen
Department of Economics and Business Economics, Aarhus University, Aarhus, Denmark
Aarhus Center for Econometrics, Aarhus University, Aarhus, Denmark
Center for Research in Energy: Economics and Markets (CoRE), Aarhus University, Aarhus, Denmark
Eric Hillebrand
Department of Economics and Business Economics, Aarhus University, Aarhus, Denmark
Center for Research in Energy: Economics and Markets (CoRE), Aarhus University, Aarhus, Denmark
Siem Jan Koopman
Department of Econometrics and Data Science, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
Tinbergen Institute, Amsterdam, the Netherlands
Department of Economics and Business Economics, Aarhus University, Aarhus, Denmark
Center for Research in Energy: Economics and Markets (CoRE), Aarhus University, Aarhus, Denmark
Rachel Lupien
Department of Geoscience, Aarhus University, Aarhus, Denmark
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Short summary
This study presents a statistical approach for identifying transitions between climate states in the Cenozoic Era using a 67.1 million-year proxy record. Our results support transitions previously identified in the literature and provide statistical justification for additional ones. The approach enables construction of confidence intervals, offering measures of uncertainty. This adds to our understanding of the Cenozoic climate and provides a tool for analyzing other paleoclimate records.
This study presents a statistical approach for identifying transitions between climate states in...
