The anatomy of past abrupt warmings recorded in Greenland ice

Capron, E.; Rasmussen, S.O.; Popp, T.J.; Erhardt, T.; Fischer, H.; Landais, A.; Pedro, J.B.; Vettoretti, G.; Grinsted, A.; Gkinis, V.; Vaughn, B.; Svensson, A.; Vinther, B.M.; White, J.W.C. (2021). The anatomy of past abrupt warmings recorded in Greenland ice. Nature Communications, 12(2106), pp. 1-12. Springer Nature 10.1038/s41467-021-22241-w

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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:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)

UniBE Contributor:

Erhardt, Tobias and Fischer, Hubertus

Subjects:

500 Science > 530 Physics

ISSN:

2041-1723

Publisher:

Springer Nature

Funders:

[42] Schweizerischer Nationalfonds

Projects:

[UNSPECIFIED] 172506, 159563, 137635, 119612, 63333

Language:

English

Submitter:

Hubertus Fischer

Date Deposited:

19 Apr 2021 13:19

Last Modified:

19 Apr 2021 13:19

Publisher DOI:

10.1038/s41467-021-22241-w

BORIS DOI:

10.48350/155906

URI:

https://boris.unibe.ch/id/eprint/155906

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