Doomed descent? How fast sulphate signals diffuse in  the EPICA Dome C ice column

Ng, Felix S. L.; Rhodes, Rachael H.; Fudge, Tyler J.; Wolff, Eric W.

doi:10.5194/tc-19-5693-2025

Articles | Volume 19, issue 11

https://doi.org/10.5194/tc-19-5693-2025

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

https://doi.org/10.5194/tc-19-5693-2025

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

Articles | Volume 19, issue 11

Research article

|

14 Nov 2025

Research article |

| 14 Nov 2025

Doomed descent? How fast sulphate signals diffuse in the EPICA Dome C ice column

Felix S. L. Ng, Rachael H. Rhodes, Tyler J. Fudge, and Eric W. Wolff

Supplement

https://doi.org/10.5194/tc-19-5693-2025-supplement

Data sets

Modelling results of the study “Doomed descent? How fast sulphate signals diffuse in the EPICA Dome C ice column” Feilx S. L. Ng https://doi.org/10.15131/shef.data.29015291

Short summary

Impurity diffusion in ice destroys climate history. We give a new way to find the diffusion rate from ice-core records. Its use on sulphate of the European Project for Ice Coring in Antarctica Dome C core reveals rapid diffusion in snow (suggesting H₂SO₄ vapour diffusion in air pores) and slow diffusion in the ice below (involving signal relocation between crystal interfaces). We estimate a maximum sulphate diffusion length of 2 cm for the old ice sought by the coring projects on Little Dome C.