Tracking sediment delivery to central Baffin Bay during the past 40 kyrs: Insights from a multiproxy approach and new age model
Reconstructing former ice sheet history and glaciogenic sediment fluxes surrounding Baffin Bay during and since the Last Glacial Maximum (LGM) is a major scientific challenge. Here, a new multi-proxy analysis of sediments from a central Baffin Bay (BB) sediment core reveals two dominant sediment/dis...
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ftunivbern:oai:boris.unibe.ch:185160 2023-09-05T13:18:17+02:00 Tracking sediment delivery to central Baffin Bay during the past 40 kyrs: Insights from a multiproxy approach and new age model Ownsworth, Emma Selby, David Lloyd, Jeremy Knutz, Paul Szidat, Sönke Andrews, John Ó Cofaigh, Colm 2023-05-15 application/pdf https://boris.unibe.ch/185160/1/Ownsworth_Sediment_delivery_to_central_Baffin_Bay__QSR_2023_.pdf https://boris.unibe.ch/185160/ eng eng Elsevier https://boris.unibe.ch/185160/ info:eu-repo/semantics/openAccess Ownsworth, Emma; Selby, David; Lloyd, Jeremy; Knutz, Paul; Szidat, Sönke; Andrews, John; Ó Cofaigh, Colm (2023). Tracking sediment delivery to central Baffin Bay during the past 40 kyrs: Insights from a multiproxy approach and new age model. Quaternary science reviews, 308, p. 108082. Elsevier 10.1016/j.quascirev.2023.108082 <http://dx.doi.org/10.1016/j.quascirev.2023.108082> 570 Life sciences biology 540 Chemistry info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2023 ftunivbern https://doi.org/10.1016/j.quascirev.2023.108082 2023-08-20T23:48:00Z Reconstructing former ice sheet history and glaciogenic sediment fluxes surrounding Baffin Bay during and since the Last Glacial Maximum (LGM) is a major scientific challenge. Here, a new multi-proxy analysis of sediments from a central Baffin Bay (BB) sediment core reveals two dominant sediment/discharge sources: 1) a detrital carbonate (BBDC; dolomite-rich) source that represents increased discharge from the NE Laurentide Ice Sheet (LIS) and southern Innuitian Ice Sheet (IIS), and 2) a radiogenic, felsic provenance likely from a west Greenland Ice Sheet (GIS) source, although a contribution from the Baffin Island LIS cannot be ruled out. By utilising a new method for radiocarbon calibration in high latitude polar environments we provide updated age constraints on BBDC1 (14.1e13 cal ka BP) and BBDC0 (12.0e10.9 cal ka BP). This coupled with our sediment analysis shows the BBDC layers to be coincident with the Bølling-Allerød (BBDC1) and the recovery from the Younger Dryas (BBDC0). The timing of BBDC1 also further supports the theory of an ice shelf covering northern Baffin Bay from the LGM and during initial deglaciation. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Island Baffin Greenland Ice Sheet Ice Shelf BORIS (Bern Open Repository and Information System, University of Bern) Baffin Bay Baffin Island Greenland Quaternary Science Reviews 308 108082 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
570 Life sciences biology 540 Chemistry |
spellingShingle |
570 Life sciences biology 540 Chemistry Ownsworth, Emma Selby, David Lloyd, Jeremy Knutz, Paul Szidat, Sönke Andrews, John Ó Cofaigh, Colm Tracking sediment delivery to central Baffin Bay during the past 40 kyrs: Insights from a multiproxy approach and new age model |
topic_facet |
570 Life sciences biology 540 Chemistry |
description |
Reconstructing former ice sheet history and glaciogenic sediment fluxes surrounding Baffin Bay during and since the Last Glacial Maximum (LGM) is a major scientific challenge. Here, a new multi-proxy analysis of sediments from a central Baffin Bay (BB) sediment core reveals two dominant sediment/discharge sources: 1) a detrital carbonate (BBDC; dolomite-rich) source that represents increased discharge from the NE Laurentide Ice Sheet (LIS) and southern Innuitian Ice Sheet (IIS), and 2) a radiogenic, felsic provenance likely from a west Greenland Ice Sheet (GIS) source, although a contribution from the Baffin Island LIS cannot be ruled out. By utilising a new method for radiocarbon calibration in high latitude polar environments we provide updated age constraints on BBDC1 (14.1e13 cal ka BP) and BBDC0 (12.0e10.9 cal ka BP). This coupled with our sediment analysis shows the BBDC layers to be coincident with the Bølling-Allerød (BBDC1) and the recovery from the Younger Dryas (BBDC0). The timing of BBDC1 also further supports the theory of an ice shelf covering northern Baffin Bay from the LGM and during initial deglaciation. |
format |
Article in Journal/Newspaper |
author |
Ownsworth, Emma Selby, David Lloyd, Jeremy Knutz, Paul Szidat, Sönke Andrews, John Ó Cofaigh, Colm |
author_facet |
Ownsworth, Emma Selby, David Lloyd, Jeremy Knutz, Paul Szidat, Sönke Andrews, John Ó Cofaigh, Colm |
author_sort |
Ownsworth, Emma |
title |
Tracking sediment delivery to central Baffin Bay during the past 40 kyrs: Insights from a multiproxy approach and new age model |
title_short |
Tracking sediment delivery to central Baffin Bay during the past 40 kyrs: Insights from a multiproxy approach and new age model |
title_full |
Tracking sediment delivery to central Baffin Bay during the past 40 kyrs: Insights from a multiproxy approach and new age model |
title_fullStr |
Tracking sediment delivery to central Baffin Bay during the past 40 kyrs: Insights from a multiproxy approach and new age model |
title_full_unstemmed |
Tracking sediment delivery to central Baffin Bay during the past 40 kyrs: Insights from a multiproxy approach and new age model |
title_sort |
tracking sediment delivery to central baffin bay during the past 40 kyrs: insights from a multiproxy approach and new age model |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://boris.unibe.ch/185160/1/Ownsworth_Sediment_delivery_to_central_Baffin_Bay__QSR_2023_.pdf https://boris.unibe.ch/185160/ |
geographic |
Baffin Bay Baffin Island Greenland |
geographic_facet |
Baffin Bay Baffin Island Greenland |
genre |
Baffin Bay Baffin Bay Baffin Island Baffin Greenland Ice Sheet Ice Shelf |
genre_facet |
Baffin Bay Baffin Bay Baffin Island Baffin Greenland Ice Sheet Ice Shelf |
op_source |
Ownsworth, Emma; Selby, David; Lloyd, Jeremy; Knutz, Paul; Szidat, Sönke; Andrews, John; Ó Cofaigh, Colm (2023). Tracking sediment delivery to central Baffin Bay during the past 40 kyrs: Insights from a multiproxy approach and new age model. Quaternary science reviews, 308, p. 108082. Elsevier 10.1016/j.quascirev.2023.108082 <http://dx.doi.org/10.1016/j.quascirev.2023.108082> |
op_relation |
https://boris.unibe.ch/185160/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2023.108082 |
container_title |
Quaternary Science Reviews |
container_volume |
308 |
container_start_page |
108082 |
_version_ |
1776199281074503680 |