Articles | Volume 20, issue 3
https://doi.org/10.5194/cp-20-683-2024
https://doi.org/10.5194/cp-20-683-2024
Research article
 | 
22 Mar 2024
Research article |  | 22 Mar 2024

Statistical precursor signals for Dansgaard–Oeschger cooling transitions

Takahito Mitsui and Niklas Boers

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Short summary
In general, the variance and short-lag autocorrelations of the fluctuations increase in a system approaching a critical transition. Using these indicators, we identify statistical precursor signals for the Dansgaard–Oeschger cooling events recorded in two climatic proxies of three Greenland ice core records. We then provide a dynamical systems theory that bridges the gap between observing statistical precursor signals and the physical precursor signs empirically known in paleoclimate research.