The Cryosphere
The Cryosphere
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Articles | Volume 19, issue 11
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

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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.
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