Additional steady-state simulations of Miocene Antarctic ice-sheet variability using 3D thermodynamical ice-sheet model IMAU-ICE ...

• Main Author: Stap, Lennert B.
• Format: Dataset
• Language: English
• Published: Zenodo 2023
• Subjects: Antarctica; Antarctic Ice Sheet; ice-sheet-atmosphere interaction; Miocene; Paleoclimate; Antarctic; East Antarctic Ice Sheet; The Antarctic; Antarc*; Ice Sheet
• Online Access: https://dx.doi.org/10.5281/zenodo.10390153; https://zenodo.org/doi/10.5281/zenodo.10390153

We supplement our previous dataset (doi:10.1594/PANGAEA.939114), with six additional steady-state simulations of the Miocene Antarctic ice sheet using the reference Miocene settings. IMAU-ICE was run using a 40x40km grid covering the Antarctic continent. Initial conditions were obtained from reconstructions of the Antarctic bathymetry and bedrock topography pertaining to 23 to 24 million years (Myr) ago (dataset doi:10.1594/PANGAEA.923109). The simulations were forced by climate input data obtained from GENESIS simulations with varying CO2 levels (280 to 840 ppm) and Antarctic ice sheet cover (no ice to a large East-Antarctic ice sheet), and with present-day insolation. We utilized a matrix interpolation method to construct the time-varying climate forcing, based on the prescribed CO2 levels and ice cover simulated by IMAU-ICE. For each simulation, we provide the run script, 1D output variables including CO2 level and the sea level contribution of the Antarctic ice sheet, and 3D output variables including ...