Radar isochrones as constraints on paleo–ice-sheet model simulations in two off-divide regions of East Antarctica

Bodart, Julien A.; Višnjević, Vjeran; Franke, Steven; Helm, Veit; Eisen, Olaf; Hermant, Antoine; Zuhr, Alexandra M.; Steinhage, Daniel; Sutter, Johannes C. R.

doi:10.5194/tc-20-1379-2026

Articles | Volume 20, issue 2

https://doi.org/10.5194/tc-20-1379-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/tc-20-1379-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 2

Research article

|

26 Feb 2026

Research article |

| 26 Feb 2026

Radar isochrones as constraints on paleo–ice-sheet model simulations in two off-divide regions of East Antarctica

Julien A. Bodart, Vjeran Višnjević, Steven Franke, Veit Helm, Olaf Eisen, Antoine Hermant, Alexandra M. Zuhr, Daniel Steinhage, and Johannes C. R. Sutter

Data sets

Dated radar Internal Reflection Horizons (IRHs) from the Wilkes Subglacial Basin (East Antarctica) for ice-sheet model calibration J. A. Bodart and J. C. Sutter https://doi.org/10.5281/zenodo.17348093

Dated radar Internal Reflection Horizons (IRHs) from Dronning Maud Land (East Antarctica) for ice-sheet model calibration J. A. Bodart and J. C. Sutter https://doi.org/10.5281/zenodo.17348975

ANT 2023/24: AWI airborne ultra-wideband radar data between Sør Rondane Mountains and the eastern DML ice divide (CHARISO Project) Veit Helm et al. https://doi.org/10.1594/PANGAEA.990049

Short summary

We used radar data and computer models to study layers within Antarctic ice that record past snowfall and ice-sheet changes. These layers, called isochrones, are seldomly used to model Antarctica’s past. By comparing radar observations with simulations, we show how they can greatly improve model accuracy and provide two new datasets to help refine future reconstructions of Antarctic ice evolution.