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

Model code and software

CLimate Ice Sheet EMulator v1.0 (CLISEMv1.0) J. Van Breedam et al.

Hysteresis_earlyCenozoic_icesheets J. Van Breedam

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.