The Cryosphere
The Cryosphere
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Articles | Volume 15, issue 4
Articles | Volume 15, issue 4
https://doi.org/10.5194/tc-15-1787-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-15-1787-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 15, issue 4
Research article
 | Highlight paper
 | 
13 Apr 2021
Research article | Highlight paper |  | 13 Apr 2021

Pervasive diffusion of climate signals recorded in ice-vein ionic impurities

Felix S. L. Ng

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Short summary
Current theory predicts climate signals in the vein chemistry of ice cores to migrate, hampering their dating. I show that the Gibbs–Thomson effect, which has been overlooked, causes fast diffusion that prevents signals from surviving into deep ice. Hence the deep climatic peaks in Antarctic and Greenlandic ice must be due to impurities in the ice matrix (outside veins) and safe from migration. These findings reset our understanding of postdepositional changes of ice-core climate signals.
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