Rebecca Jackson
Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay
Jackson, Rebecca; Kvorning, Anna Bang; Limoges, Audrey; Georgiadis, Eleanor; Olsen, Steffen M.; Tallberg, Petra; Andersen, Thorbjørn J.; Mikkelsen, Naja; Giraudeau, Jacques; Massé, Guillaume; Wacker, Lukas; Ribeiro, Sofia
Authors
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
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.
Citation
Jackson, R., Kvorning, A. B., Limoges, A., Georgiadis, E., Olsen, S. M., Tallberg, P., …Ribeiro, S. (2021). Holocene polynya dynamics and their interaction with oceanic heat transport in northernmost Baffin Bay. Scientific Reports, 11(1), Article 10095. https://doi.org/10.1038/s41598-021-88517-9
Journal Article Type | Article |
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Acceptance Date | Mar 30, 2021 |
Online Publication Date | May 12, 2021 |
Publication Date | 2021 |
Deposit Date | Sep 2, 2021 |
Publicly Available Date | Sep 2, 2021 |
Journal | Scientific Reports |
Publisher | Nature Research |
Peer Reviewed | Peer Reviewed |
Volume | 11 |
Issue | 1 |
Article Number | 10095 |
DOI | https://doi.org/10.1038/s41598-021-88517-9 |
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