Age, thinning and spatial origin of the Beyond EPICA ice from a 2.5D ice flow model

Chung, Ailsa; Parrenin, Frédéric; Mulvaney, Robert; Vittuari, Luca; Frezzotti, Massimo; Zanutta, Antonio; Lilien, David A.; Cavitte, Marie G. P.; Eisen, Olaf

doi:https://doi.org/10.5194/tc-19-4125-2025

Articles | Volume 19, issue 10

https://doi.org/10.5194/tc-19-4125-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Oldest Ice: finding and interpreting climate proxies in ice...

https://doi.org/10.5194/tc-19-4125-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 10

Research article

|

01 Oct 2025

Research article |

| 01 Oct 2025

Age, thinning and spatial origin of the Beyond EPICA ice from a 2.5D ice flow model

Ailsa Chung, Frédéric Parrenin, Robert Mulvaney, Luca Vittuari, Massimo Frezzotti, Antonio Zanutta, David A. Lilien, Marie G. P. Cavitte, and Olaf Eisen

Supplement

https://doi.org/10.5194/tc-19-4125-2025-supplement

Data sets

Age-depth profile from a 2.5D model of the Beyond EPICA ice core drill site at Little Dome C A. Chung et al. https://doi.org/10.1594/PANGAEA.984413

AICC2012 chronology for ice core EDC [dataset] L. Bazin et al. https://doi.org/10.1594/PANGAEA.824865

Model code and software

IsoInv2.5D A. Chung and F. Parrenin https://doi.org/10.5281/zenodo.15739858

Short summary

We applied an ice flow model to a flow line from the summit of Dome C to the Beyond EPICA ice core drill site on Little Dome C in Antarctica. Results show that the oldest ice at the drill site may be 1.12 Ma (at an age density of 20 kyr m^-1) and originate from around 15 km upstream. We also discuss the nature of the 200–250 m thick basal layer which could be composed of stagnant ice, disturbed ice or even accreted ice (possibly containing debris).