Destabilisation of the Subpolar North Atlantic prior to the Little Ice Age.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
25 08 2022
25 08 2022
Historique:
received:
13
12
2021
accepted:
09
08
2022
entrez:
25
8
2022
pubmed:
26
8
2022
medline:
30
8
2022
Statut:
epublish
Résumé
The cooling transition into the Little Ice Age was the last notable shift in the climate system prior to anthropogenic global warming. It is hypothesised that sea-ice to ocean feedbacks sustained an initial cooling into the Little Ice Age by weakening the subpolar gyre circulation; a system that has been proposed to exhibit bistability. Empirical evidence for bistability within this transition has however been lacking. Using statistical indicators of resilience in three annually-resolved bivalve proxy records from the North Icelandic shelf, we show that the subpolar North Atlantic climate system destabilised during two episodes prior to the Little Ice Age. This loss of resilience indicates reduced attraction to one stable state, and a system vulnerable to an abrupt transition. The two episodes preceded wider subpolar North Atlantic change, consistent with subpolar gyre destabilisation and the approach of a tipping point, potentially heralding the transition to Little Ice Age conditions.
Identifiants
pubmed: 36008418
doi: 10.1038/s41467-022-32653-x
pii: 10.1038/s41467-022-32653-x
pmc: PMC9411610
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
5008Informations de copyright
© 2022. The Author(s).
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