Detrital carbonate peaks on the Labrador shelf, a 13-7 ka template for freshwater forcing from the Hudson Strait outlet of the Laurentide Ice Sheet into the subpolar gyre
The Laurentide Ice Sheet (LIS) was a large, dynamic ice sheet in the early Holocene. The glacial events through Hudson Strait leading to its eventual demise are recorded in the well-dated Labrador shelf core, MD99-2236 from the Cartwright Saddle. We develop a detailed history of the timing of ice-sh...
Published in: | Quaternary Science Reviews |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2015
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Online Access: | https://pure.au.dk/portal/en/publications/eb339063-dad6-4468-80f1-e32a108b2f12 https://doi.org/10.1016/j.quascirev.2014.10.022 |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/eb339063-dad6-4468-80f1-e32a108b2f12 2024-02-11T10:03:53+01:00 Detrital carbonate peaks on the Labrador shelf, a 13-7 ka template for freshwater forcing from the Hudson Strait outlet of the Laurentide Ice Sheet into the subpolar gyre Jennings, Anne Andrews, John Pearce, Christof Wilson, Lindsay Olfasdotttir, Saedis 2015-01-01 https://pure.au.dk/portal/en/publications/eb339063-dad6-4468-80f1-e32a108b2f12 https://doi.org/10.1016/j.quascirev.2014.10.022 eng eng https://pure.au.dk/portal/en/publications/eb339063-dad6-4468-80f1-e32a108b2f12 info:eu-repo/semantics/restrictedAccess Jennings , A , Andrews , J , Pearce , C , Wilson , L & Olfasdotttir , S 2015 , ' Detrital carbonate peaks on the Labrador shelf, a 13-7 ka template for freshwater forcing from the Hudson Strait outlet of the Laurentide Ice Sheet into the subpolar gyre ' , Quaternary Science Reviews , vol. 107 , pp. 62-80 . https://doi.org/10.1016/j.quascirev.2014.10.022 Laurentide Ice Sheet Hudson Strait outlet Detrital carbonate peaks Glacial events Holocene deglaciation Freshwater forcing Subpolar gyre ABRUPT CLIMATE-CHANGE GLACIAL LAKE AGASSIZ C-14 YR BP NORTH-ATLANTIC HEINRICH EVENTS COLD EVENT CATASTROPHIC DRAINAGE CARTWRIGHT SADDLE SUBGLACIAL ORIGIN article 2015 ftuniaarhuspubl https://doi.org/10.1016/j.quascirev.2014.10.022 2024-01-24T23:59:01Z The Laurentide Ice Sheet (LIS) was a large, dynamic ice sheet in the early Holocene. The glacial events through Hudson Strait leading to its eventual demise are recorded in the well-dated Labrador shelf core, MD99-2236 from the Cartwright Saddle. We develop a detailed history of the timing of ice-sheet discharge events from the Hudson Strait outlet of the LIS during the Holocene using high-resolution detrital carbonate, ice rafted detritus (IRD), delta O-18, and sediment color data. Eight detrital carbonate peaks (DCPs) associated with IRD peaks and light oxygen isotope events punctuate the MD99-2236 record between 11.5 and 8.0 ka. We use the stratigraphy of the DCPs developed from MD99-2236 to select the appropriate Delta R to calibrate the ages of recorded glacial events in Hudson Bay and Hudson Strait such that they match the DCPs in MD99-2236. We associate the eight DCPs with H0, Gold Cove advance, Noble Inlet advance, initial retreat of the Hudson Strait ice stream (HSIS) from Hudson Strait, opening of the Tyrrell Sea, and drainage of glacial lakes Agassiz and Ojibway. The opening of Foxe Channel and retreat of glacial ice from Foxe Basin are represented by a shoulder in the carbonate data. Delta R of 350 years applied to the radiocarbon ages constraining glacial events H0 through the opening of the Tyrell Sea provided the best match with the MD99-2236 DCPs; Delta R values and ages from the literature are used for the younger events. A very close age match was achieved between the 8.2 ka cold event in the Greenland ice cores, DCP7 (8.15 ka BP), and the drainage of glacial lakes Agassiz and Ojibway. Our stratigraphic comparison between the DCPs in MD99-2236 and the calibrated ages of Hudson Strait/Bay deglacial events shows that the retreat of the HSIS, the opening of the Tyrell Sea, and the catastrophic drainage of glacial lakes Agassiz and Ojibway at 8.2 ka are separate events that have been combined in previous estimates of the timing of the 8.2 ka event from marine records. SW Iceland shelf core ... Article in Journal/Newspaper Foxe Basin Foxe Channel Greenland Greenland ice cores Hudson Bay Hudson Strait Ice Sheet Iceland North Atlantic Aarhus University: Research Cartwright ENVELOPE(-57.018,-57.018,53.708,53.708) Foxe Basin ENVELOPE(-77.918,-77.918,65.931,65.931) Foxe Channel ENVELOPE(-79.999,-79.999,65.001,65.001) Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Greenland Hudson Hudson Bay Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) Labrador Shelf ENVELOPE(-58.000,-58.000,56.000,56.000) Noble Inlet ENVELOPE(-66.073,-66.073,62.067,62.067) Tyrrell ENVELOPE(-69.512,-69.512,-69.634,-69.634) Quaternary Science Reviews 107 62 80 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Laurentide Ice Sheet Hudson Strait outlet Detrital carbonate peaks Glacial events Holocene deglaciation Freshwater forcing Subpolar gyre ABRUPT CLIMATE-CHANGE GLACIAL LAKE AGASSIZ C-14 YR BP NORTH-ATLANTIC HEINRICH EVENTS COLD EVENT CATASTROPHIC DRAINAGE CARTWRIGHT SADDLE SUBGLACIAL ORIGIN |
spellingShingle |
Laurentide Ice Sheet Hudson Strait outlet Detrital carbonate peaks Glacial events Holocene deglaciation Freshwater forcing Subpolar gyre ABRUPT CLIMATE-CHANGE GLACIAL LAKE AGASSIZ C-14 YR BP NORTH-ATLANTIC HEINRICH EVENTS COLD EVENT CATASTROPHIC DRAINAGE CARTWRIGHT SADDLE SUBGLACIAL ORIGIN Jennings, Anne Andrews, John Pearce, Christof Wilson, Lindsay Olfasdotttir, Saedis Detrital carbonate peaks on the Labrador shelf, a 13-7 ka template for freshwater forcing from the Hudson Strait outlet of the Laurentide Ice Sheet into the subpolar gyre |
topic_facet |
Laurentide Ice Sheet Hudson Strait outlet Detrital carbonate peaks Glacial events Holocene deglaciation Freshwater forcing Subpolar gyre ABRUPT CLIMATE-CHANGE GLACIAL LAKE AGASSIZ C-14 YR BP NORTH-ATLANTIC HEINRICH EVENTS COLD EVENT CATASTROPHIC DRAINAGE CARTWRIGHT SADDLE SUBGLACIAL ORIGIN |
description |
The Laurentide Ice Sheet (LIS) was a large, dynamic ice sheet in the early Holocene. The glacial events through Hudson Strait leading to its eventual demise are recorded in the well-dated Labrador shelf core, MD99-2236 from the Cartwright Saddle. We develop a detailed history of the timing of ice-sheet discharge events from the Hudson Strait outlet of the LIS during the Holocene using high-resolution detrital carbonate, ice rafted detritus (IRD), delta O-18, and sediment color data. Eight detrital carbonate peaks (DCPs) associated with IRD peaks and light oxygen isotope events punctuate the MD99-2236 record between 11.5 and 8.0 ka. We use the stratigraphy of the DCPs developed from MD99-2236 to select the appropriate Delta R to calibrate the ages of recorded glacial events in Hudson Bay and Hudson Strait such that they match the DCPs in MD99-2236. We associate the eight DCPs with H0, Gold Cove advance, Noble Inlet advance, initial retreat of the Hudson Strait ice stream (HSIS) from Hudson Strait, opening of the Tyrrell Sea, and drainage of glacial lakes Agassiz and Ojibway. The opening of Foxe Channel and retreat of glacial ice from Foxe Basin are represented by a shoulder in the carbonate data. Delta R of 350 years applied to the radiocarbon ages constraining glacial events H0 through the opening of the Tyrell Sea provided the best match with the MD99-2236 DCPs; Delta R values and ages from the literature are used for the younger events. A very close age match was achieved between the 8.2 ka cold event in the Greenland ice cores, DCP7 (8.15 ka BP), and the drainage of glacial lakes Agassiz and Ojibway. Our stratigraphic comparison between the DCPs in MD99-2236 and the calibrated ages of Hudson Strait/Bay deglacial events shows that the retreat of the HSIS, the opening of the Tyrell Sea, and the catastrophic drainage of glacial lakes Agassiz and Ojibway at 8.2 ka are separate events that have been combined in previous estimates of the timing of the 8.2 ka event from marine records. SW Iceland shelf core ... |
format |
Article in Journal/Newspaper |
author |
Jennings, Anne Andrews, John Pearce, Christof Wilson, Lindsay Olfasdotttir, Saedis |
author_facet |
Jennings, Anne Andrews, John Pearce, Christof Wilson, Lindsay Olfasdotttir, Saedis |
author_sort |
Jennings, Anne |
title |
Detrital carbonate peaks on the Labrador shelf, a 13-7 ka template for freshwater forcing from the Hudson Strait outlet of the Laurentide Ice Sheet into the subpolar gyre |
title_short |
Detrital carbonate peaks on the Labrador shelf, a 13-7 ka template for freshwater forcing from the Hudson Strait outlet of the Laurentide Ice Sheet into the subpolar gyre |
title_full |
Detrital carbonate peaks on the Labrador shelf, a 13-7 ka template for freshwater forcing from the Hudson Strait outlet of the Laurentide Ice Sheet into the subpolar gyre |
title_fullStr |
Detrital carbonate peaks on the Labrador shelf, a 13-7 ka template for freshwater forcing from the Hudson Strait outlet of the Laurentide Ice Sheet into the subpolar gyre |
title_full_unstemmed |
Detrital carbonate peaks on the Labrador shelf, a 13-7 ka template for freshwater forcing from the Hudson Strait outlet of the Laurentide Ice Sheet into the subpolar gyre |
title_sort |
detrital carbonate peaks on the labrador shelf, a 13-7 ka template for freshwater forcing from the hudson strait outlet of the laurentide ice sheet into the subpolar gyre |
publishDate |
2015 |
url |
https://pure.au.dk/portal/en/publications/eb339063-dad6-4468-80f1-e32a108b2f12 https://doi.org/10.1016/j.quascirev.2014.10.022 |
long_lat |
ENVELOPE(-57.018,-57.018,53.708,53.708) ENVELOPE(-77.918,-77.918,65.931,65.931) ENVELOPE(-79.999,-79.999,65.001,65.001) ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(-70.000,-70.000,62.000,62.000) ENVELOPE(-58.000,-58.000,56.000,56.000) ENVELOPE(-66.073,-66.073,62.067,62.067) ENVELOPE(-69.512,-69.512,-69.634,-69.634) |
geographic |
Cartwright Foxe Basin Foxe Channel Glacial Lake Greenland Hudson Hudson Bay Hudson Strait Labrador Shelf Noble Inlet Tyrrell |
geographic_facet |
Cartwright Foxe Basin Foxe Channel Glacial Lake Greenland Hudson Hudson Bay Hudson Strait Labrador Shelf Noble Inlet Tyrrell |
genre |
Foxe Basin Foxe Channel Greenland Greenland ice cores Hudson Bay Hudson Strait Ice Sheet Iceland North Atlantic |
genre_facet |
Foxe Basin Foxe Channel Greenland Greenland ice cores Hudson Bay Hudson Strait Ice Sheet Iceland North Atlantic |
op_source |
Jennings , A , Andrews , J , Pearce , C , Wilson , L & Olfasdotttir , S 2015 , ' Detrital carbonate peaks on the Labrador shelf, a 13-7 ka template for freshwater forcing from the Hudson Strait outlet of the Laurentide Ice Sheet into the subpolar gyre ' , Quaternary Science Reviews , vol. 107 , pp. 62-80 . https://doi.org/10.1016/j.quascirev.2014.10.022 |
op_relation |
https://pure.au.dk/portal/en/publications/eb339063-dad6-4468-80f1-e32a108b2f12 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2014.10.022 |
container_title |
Quaternary Science Reviews |
container_volume |
107 |
container_start_page |
62 |
op_container_end_page |
80 |
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1790600231216218112 |