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The Cryosphere
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Articles | Volume 19, issue 10
Articles | Volume 19, issue 10
https://doi.org/10.5194/tc-19-4913-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/tc-19-4913-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 10
Research article
 | 
23 Oct 2025
Research article |  | 23 Oct 2025

The impact of measurement precision on the resolvable resolution of ice core water isotope reconstructions

Fyntan Shaw, Thomas Münch, Vasileios Gkinis, and Thomas Laepple

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Short summary
Diffusion in combination with measurement noise erase high-frequency water isotope variability in ice cores, linking measurement precision to recoverable resolution. We derive expressions for this relationship, finding a resolution improvement of 1.5 times for a 10-fold measurement noise reduction. Based on the current age-depth model, our method predicts 10 000-year cycles will be recoverable in the 1.5 Myr old ice from the Oldest Ice Core δ18O record if a noise level of 0.01 ‰ is achieved.
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