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The anatomy of past abrupt warmings recorded in Greenland ice

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Capron, E, Rasmussen, SO, Popp, TJ, Erhardt, T, Fischer, H, Landais, A, Pedro, JB ORCID: 0000-0002-0728-2712, Vettoretti, G, Grinsted, A, Gkinis, V, Vaughn, B, Svensson, A, Vinther, BM and White, JWC 2021 , 'The anatomy of past abrupt warmings recorded in Greenland ice' , Nature Communications, vol. 12, no. 1 , pp. 1-12 , doi: 10.1038/s41467-021-22241-w.

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Abstract

Data availability and temporal resolution make it challenging to unravel the anatomy (duration and temporal phasing) of the Last Glacial abrupt climate changes. Here, we address these limitations by investigating the anatomy of abrupt changes using sub-decadal-scale records from Greenland ice cores. We highlight the absence of a systematic pattern in the anatomy of abrupt changes as recorded in different ice parameters. This diversity in the sequence of changes seen in ice-core data is also observed in climate parameters derived from numerical simulations which exhibit self-sustained abrupt variability arising from internal atmosphere-ice-ocean interactions. Our analysis of two ice cores shows that the diversity of abrupt warming transitions represents variability inherent to the climate system and not archive-specific noise. Our results hint that during these abrupt events, it may not be possible to infer statistically-robust leads and lags between the different components of the climate system because of their tight coupling.

Item Type: Article
Authors/Creators:Capron, E and Rasmussen, SO and Popp, TJ and Erhardt, T and Fischer, H and Landais, A and Pedro, JB and Vettoretti, G and Grinsted, A and Gkinis, V and Vaughn, B and Svensson, A and Vinther, BM and White, JWC
Keywords: Last Glacial, Greenland, ice core, climate
Journal or Publication Title: Nature Communications
Publisher: Nature Publishing Group
ISSN: 2041-1723
DOI / ID Number: 10.1038/s41467-021-22241-w
Copyright Information:

Copyright 2021 The Authors

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