Articles | Volume 19, issue 12
https://doi.org/10.5194/cp-19-2551-2023
https://doi.org/10.5194/cp-19-2551-2023
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

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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.