Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay

Abstract Baffin Bay hosts the largest and most productive of the Arctic polynyas: the North Water (NOW). Despite its significance and active role in water mass formation, the history of the NOW beyond the observational era remains poorly known. We reconcile the previously unassessed relationship bet...

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Autores principales:	Rebecca Jackson, Anna Bang Kvorning, Audrey Limoges, Eleanor Georgiadis, Steffen M. Olsen, Petra Tallberg, Thorbjørn J. Andersen, Naja Mikkelsen, Jacques Giraudeau, Guillaume Massé, Lukas Wacker, Sofia Ribeiro
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/adf013b50aaf43e1a197795f202da658
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spelling	oai:doaj.org-article:adf013b50aaf43e1a197795f202da6582021-12-02T17:15:24ZHolocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay10.1038/s41598-021-88517-92045-2322https://doaj.org/article/adf013b50aaf43e1a197795f202da6582021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88517-9https://doaj.org/toc/2045-2322Abstract Baffin Bay hosts the largest and most productive of the Arctic polynyas: the North Water (NOW). Despite its significance and active role in water mass formation, the history of the NOW beyond the observational era remains poorly known. We reconcile the previously unassessed relationship between long-term NOW dynamics and ocean conditions by applying a multiproxy approach to two marine sediment cores from the region that, together, span the Holocene. Declining influence of Atlantic Water in the NOW is coeval with regional records that indicate the inception of a strong and recurrent polynya from ~ 4400 yrs BP, in line with Neoglacial cooling. During warmer Holocene intervals such as the Roman Warm Period, a weaker NOW is evident, and its reduced capacity to influence bottom ocean conditions facilitated northward penetration of Atlantic Water. Future warming in the Arctic may have negative consequences for this vital biological oasis, with the potential knock-on effect of warm water penetration further north and intensified melt of the marine-terminating glaciers that flank the coast of northwest Greenland.Rebecca JacksonAnna Bang KvorningAudrey LimogesEleanor GeorgiadisSteffen M. OlsenPetra TallbergThorbjørn J. AndersenNaja MikkelsenJacques GiraudeauGuillaume MasséLukas WackerSofia RibeiroNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-17 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Rebecca Jackson Anna Bang Kvorning Audrey Limoges Eleanor Georgiadis Steffen M. Olsen Petra Tallberg Thorbjørn J. Andersen Naja Mikkelsen Jacques Giraudeau Guillaume Massé Lukas Wacker Sofia Ribeiro Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay
description	Abstract Baffin Bay hosts the largest and most productive of the Arctic polynyas: the North Water (NOW). Despite its significance and active role in water mass formation, the history of the NOW beyond the observational era remains poorly known. We reconcile the previously unassessed relationship between long-term NOW dynamics and ocean conditions by applying a multiproxy approach to two marine sediment cores from the region that, together, span the Holocene. Declining influence of Atlantic Water in the NOW is coeval with regional records that indicate the inception of a strong and recurrent polynya from ~ 4400 yrs BP, in line with Neoglacial cooling. During warmer Holocene intervals such as the Roman Warm Period, a weaker NOW is evident, and its reduced capacity to influence bottom ocean conditions facilitated northward penetration of Atlantic Water. Future warming in the Arctic may have negative consequences for this vital biological oasis, with the potential knock-on effect of warm water penetration further north and intensified melt of the marine-terminating glaciers that flank the coast of northwest Greenland.
format	article
author	Rebecca Jackson Anna Bang Kvorning Audrey Limoges Eleanor Georgiadis Steffen M. Olsen Petra Tallberg Thorbjørn J. Andersen Naja Mikkelsen Jacques Giraudeau Guillaume Massé Lukas Wacker Sofia Ribeiro
author_facet	Rebecca Jackson Anna Bang Kvorning Audrey Limoges Eleanor Georgiadis Steffen M. Olsen Petra Tallberg Thorbjørn J. Andersen Naja Mikkelsen Jacques Giraudeau Guillaume Massé Lukas Wacker Sofia Ribeiro
author_sort	Rebecca Jackson
title	Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay
title_short	Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay
title_full	Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay
title_fullStr	Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay
title_full_unstemmed	Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay
title_sort	holocene polynya dynamics and their interaction with oceanic heat transport in northernmost baffin bay
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/adf013b50aaf43e1a197795f202da658
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Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay

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