Hysteresis and orbital pacing of the early Cenozoic Antarctic ice sheet

Van Breedam, Jonas; Huybrechts, Philippe; Crucifix, Michel

doi:https://doi.org/10.5194/cp-19-2551-2023

Articles | Volume 19, issue 12

https://doi.org/10.5194/cp-19-2551-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/cp-19-2551-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 12

Research article

|

14 Dec 2023

Research article |

| 14 Dec 2023

Hysteresis and orbital pacing of the early Cenozoic Antarctic ice sheet

Jonas Van Breedam, Philippe Huybrechts, and Michel Crucifix

Supplement

https://doi.org/10.5194/cp-19-2551-2023-supplement

Model code and software

CLimate Ice Sheet EMulator v1.0 (CLISEMv1.0) J. Van Breedam et al. https://doi.org/10.5281/zenodo.5245156

Hysteresis_earlyCenozoic_icesheets J. Van Breedam https://doi.org/10.5281/zenodo.10359835

Short summary

We investigated the different boundary conditions to allow ice sheet growth and ice sheet decline of the Antarctic ice sheet when it appeared ∼38–34 Myr ago. The thresholds for ice sheet growth and decline differ because of the different climatological conditions above an ice sheet (higher elevation and higher albedo) compared to a bare topography. We found that the ice–albedo feedback and the isostasy feedback respectively ease and delay the transition from a deglacial to glacial state.