Climate of the Past
Climate of the Past
CP
Articles | Volume 21, issue 11
Articles | Volume 21, issue 11
https://doi.org/10.5194/cp-21-1917-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-21-1917-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 11
Research article
 | 
04 Nov 2025
Research article |  | 04 Nov 2025

The colors of proxy noise

Mara Y. McPartland, Thomas Münch, Andrew M. Dolman, Raphaël Hébert, and Thomas Laepple

Data sets

NOAA/WDS Paleoclimatology - PAGES2k Global 2,000 Year Multiproxy Database J. Emile-Geay et al. https://doi.org/10.25921/YCR3-7588

Model code and software

proxysnr: An R package to separate the common signal from local noise in climate proxy records using spectral analysis (v1.0.1) Thomas Münch https://doi.org/10.5281/zenodo.17098991

ice-colors-of-noise: R software to perform signal-to-noise ratio analyses for Greenland and Antarctic ice-core data (v0.1.0) Thomas Münch https://doi.org/10.5281/zenodo.17102273

EarthSystemDiagnostics/McPartland_etal_2024_DendroSNR: v1.1 Mara McPartland and Andrew Dolman https://doi.org/10.5281/zenodo.10822165

EarthSystemDiagnostics/Dolman-et-al-2024-corals-exaggerate: Code for second submission of paper Andrew Dolman https://doi.org/10.5281/zenodo.14025394

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Short summary
Paleoclimate proxy records contain a combination of climate signals and non-climatic noise. This noise can affect year-to-year variations, or introduce uncertainty on medium and long timescales. Proxies contain different types, or "colors" of noise stemming from the diverse physical and biological processes that go into their creation. We show how non-climatic noise affects tree rings, corals and ice cores. We aim to improve representations of noise in paleoclimate research activities.
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