Antarctic evidence for an abrupt northward shift of the Southern Hemisphere westerlies at 32 ka BP.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
05 Sep 2023
05 Sep 2023
Historique:
received:
07
08
2022
accepted:
16
08
2023
medline:
6
9
2023
pubmed:
6
9
2023
entrez:
5
9
2023
Statut:
epublish
Résumé
High-resolution ice core records from coastal Antarctica are particularly useful to inform our understanding of environmental changes and their drivers. Here, we present a decadally resolved record of sea-salt sodium (a proxy for open-ocean area) and non-sea salt calcium (a proxy for continental dust) from the well-dated Roosevelt Island Climate Evolution (RICE) core, focusing on the time period between 40-26 ka BP. The RICE dust record exhibits an abrupt shift towards a higher mean dust concentration at 32 ka BP. Investigating existing ice-core records, we find this shift is a prominent feature across Antarctica. We propose that this shift is linked to an equatorward displacement of Southern Hemisphere westerly winds. Subsequent to the wind shift, data suggest a weakening of Southern Ocean upwelling and a decline of atmospheric CO
Identifiants
pubmed: 37669925
doi: 10.1038/s41467-023-40951-1
pii: 10.1038/s41467-023-40951-1
pmc: PMC10480229
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
5432Subventions
Organisme : Ministry of Business, Innovation and Employment (MBIE)
ID : RDF-VUW-1103
Organisme : Ministry of Business, Innovation and Employment (MBIE)
ID : 540GCT32
Informations de copyright
© 2023. Springer Nature Limited.
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