Hydroclimate variability in the Caribbean during North Atlantic Heinrich cooling events (H8 and H9)

Par Conseil national de recherches du Canada

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DOI	Trouver le DOI : https://doi.org/10.1038/s41598-022-24610-x
Auteur	Rechercher : Ait Brahim, Yassine; Rechercher : Peros, Matthew C.; Rechercher : Viau, André E.; Rechercher : Liedtke, Mercedes; Rechercher : Pajón, Jesús M.; Rechercher : Valdes, Julio¹; Rechercher : Li, Xianglei; Rechercher : Edwards, R. Lawrence; Rechercher : Reinhardt, Eduard G.; Rechercher : Oliva, Frank
Affiliation	Conseil national de recherches du Canada. Technologies numériques
Bailleur de fonds	Rechercher : Fonds de recherche du Québec - Nature et technologies; Rechercher : Bishop's University Senate Research Grant; Rechercher : Natural Sciences and Engineering Research Council of Canada
Format	Texte, Article
Sujet	climate change; geochemistry; palaeoclimate
Résumé	We present a speleothem record from western Cuba, spanning the period 98.7–84.9 ka BP. Our record shows two distinctive periods of high δ¹⁸O corresponding to dry and/or cold periods during 85–87.6 and 90.2–93.1 ka BP, synchronous with Heinrich events 8 and 9 (H8 and H9). Hence, we provide the first proxy evidence of the local Caribbean climate response to H8 and H9. Interestingly, H8 is more pronounced compared to H9, which may be a local response to lower temperatures in the North Atlantic resulting in a weak AMOC and reduced deep water formation, therefore a stronger south shift of the ITCZ. Our data complement existing speleothem records from western Cuba which, collectively, provide a nearly continuous paleoclimate time-series spanning the last 100 ka BP, indicating a consistent response to millennial-scale events as dry and/or cooler conditions. The comparison with regional paleoclimate records reveals an anti-phased relationship with South America, caused by the southern movements of the ITCZ during millennial-scale events which lead to dry conditions in the Caribbean and a stronger South American Monsoon System.
Date de publication	2022-12-01
Maison d’édition	Springer Nature
Licence	Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/deed.fr
Dans	Scientific Reports 12, nº 1, 20719 (1 décembre 2022) : 1–12.
Données connexes	Western Cuba Speleothem Oxygen Isotope Record over the last 100,000 Years. https://www.ncei.noaa.gov/access/paleo-search/study/37098.
Langue	anglais
Publications évaluées par des pairs	Oui
Exporter la notice	Exporter en format RIS
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Identificateur de l’enregistrement	b270ebe8-7d4b-4351-af81-86857808f40b
Enregistrement créé	2022-12-08
Enregistrement modifié	2022-12-09

Date de modification :: 2024-07-07