Climate of the Past
Climate of the Past
CP
Articles | Volume 22, issue 1
Articles | Volume 22, issue 1
https://doi.org/10.5194/cp-22-17-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-22-17-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 1
Rapid communication
 | 
09 Jan 2026
Rapid communication |  | 09 Jan 2026

Rapid communication: Middle Pleistocene Transition as a phenomenon of orbitally enabled sensitivity to initial values

Mikhail Y. Verbitsky and Anne Willem Omta

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Short summary
The cause of the Middle Pleistocene Transition (MPT) period shift is generally thought to be a change within the Earth System, since the orbital insolation forcing does not change its pattern through the event. Here we propose that the MPT could be a dominant-period relaxation process that may be strongly dependent on the initial state of the system and this sensitivity to the initial state is enabled by the orbital forcing.
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