Climate of the Past
Climate of the Past
CP
Articles | Volume 22, issue 3
Articles | Volume 22, issue 3
https://doi.org/10.5194/cp-22-675-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-22-675-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 3
Research article
 | 
27 Mar 2026
Research article |  | 27 Mar 2026

Simulating global ice volume across the Mid-Pleistocene Transition with a ramp-like increase in the deglaciation threshold

Felix Pollak, Frédéric Parrenin, Emilie Capron, Zanna Chase, Lenneke Jong, and Etienne Legrain

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Short summary
The Mid-Pleistocene Transition (MPT) marked a shift towards extended glacial periods and amplitudes, while its underlying mechanisms are still disputed. Here, we present a new conceptual model, capable of reconstructing global ice volume over the past 2.6 Ma, including a shift in frequency and amplitude during the MPT. We find that a long-lasting, gradual trend in the Earth-climate system is most favourable in reconstructing the MPT and that it started over 2 Ma. 
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