The history of ice-sheet retreat on North America during Termination 5: Implications for the origin of the sea-level highstand during interglacial stage 11
Highlights: • We present a T5 record of the Pb isotope composition Labrador Sea seawater. • These data can be used to track Laurentide Ice Sheet (LIS) extent over Hudson Bay. • LIS retreat during T5 occurred over longer timescales than that for T2 and T1. • LIS deglaciation played important role in...
Published in: | Earth and Planetary Science Letters |
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Language: | English |
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Elsevier
2023
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Online Access: | https://oceanrep.geomar.de/id/eprint/58975/ https://oceanrep.geomar.de/id/eprint/58975/1/1-s2.0-S0012821X23002996-main.pdf https://oceanrep.geomar.de/id/eprint/58975/2/ScienceDirect_files_24Jul2023_07-26-10.835.zip https://doi.org/10.1016/j.epsl.2023.118286 |
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ftoceanrep:oai:oceanrep.geomar.de:58975 2024-02-11T10:04:28+01:00 The history of ice-sheet retreat on North America during Termination 5: Implications for the origin of the sea-level highstand during interglacial stage 11 Parker, Rebecca L. Foster, Gavin L. Gutjahr, Marcus Wilson, Paul A. Obrochta, Stephen P. Fagel, Nathalie Cooper, Matthew J. Michalik, Agnes Milton, James A. Bailey, Ian 2023-09 text archive https://oceanrep.geomar.de/id/eprint/58975/ https://oceanrep.geomar.de/id/eprint/58975/1/1-s2.0-S0012821X23002996-main.pdf https://oceanrep.geomar.de/id/eprint/58975/2/ScienceDirect_files_24Jul2023_07-26-10.835.zip https://doi.org/10.1016/j.epsl.2023.118286 en eng Elsevier https://oceanrep.geomar.de/id/eprint/58975/1/1-s2.0-S0012821X23002996-main.pdf https://oceanrep.geomar.de/id/eprint/58975/2/ScienceDirect_files_24Jul2023_07-26-10.835.zip Parker, R. L., Foster, G. L., Gutjahr, M. , Wilson, P. A., Obrochta, S. P., Fagel, N., Cooper, M. J., Michalik, A., Milton, J. A. and Bailey, I. (2023) The history of ice-sheet retreat on North America during Termination 5: Implications for the origin of the sea-level highstand during interglacial stage 11. Open Access Earth and Planetary Science Letters, 618 . Art.Nr. 118286. DOI 10.1016/j.epsl.2023.118286 <https://doi.org/10.1016/j.epsl.2023.118286>. doi:10.1016/j.epsl.2023.118286 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2023 ftoceanrep https://doi.org/10.1016/j.epsl.2023.118286 2024-01-15T00:27:33Z Highlights: • We present a T5 record of the Pb isotope composition Labrador Sea seawater. • These data can be used to track Laurentide Ice Sheet (LIS) extent over Hudson Bay. • LIS retreat during T5 occurred over longer timescales than that for T2 and T1. • LIS deglaciation played important role in protracted nature of T5 sea-level rise. • Ice retreat during T1 may not be applicable template for older terminations in GIA modelling. Termination (T) 5, ∼424 ka, involved the biggest deglaciation of land-ice mass during the Quaternary. Warming and ice-sheet retreat during T5 led to an exceptionally long period of interglacial warmth known as Marine Isotope Stage (MIS) 11, ∼424–395 ka. A detailed understanding of the history of continental ice-sheet decay during T5 is required to disentangle regional contributions of ice-sheet retreat to sea-level rise (that range between ∼1 and 13 m above present day) and to correct it for glacio-isostatic adjustments (GIA). Yet little is known about the timing and magnitude of retreat during this time of the volumetrically most important continental ice sheet in the Northern Hemisphere, the Laurentide Ice Sheet (LIS). Here we present new authigenic Fe-Mn oxyhydroxide-derived high-resolution records of Pb isotope data and associated rare earth element profiles for samples spanning T5 from Labrador Sea IODP Site U1302/3. These records feature astronomically-paced radiogenic Pb isotope excursions that track increases in chemical weathering of North American bedrock and freshwater routing to the Labrador Sea via Hudson Straits associated with LIS retreat. Our records show that LIS retreat during T5 began 429. 2 ± 7.9 ka (2σ) and likely occurred over a longer timescale (by ∼10 to 5 kyr) than that observed for T2 and T1. They also show that Hudson Bay Ice Saddle collapse (and therefore LIS break-up) occurred ∼419 ± 4.7 ka (2σ), around the same time as best estimates of southern Greenland deglaciation, but ∼12 kyr before LIS deglaciation and the sea-level high-stand associated with the ... Article in Journal/Newspaper Greenland Hudson Bay Ice Sheet Labrador Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Greenland Hudson Hudson Bay Earth and Planetary Science Letters 618 118286 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Highlights: • We present a T5 record of the Pb isotope composition Labrador Sea seawater. • These data can be used to track Laurentide Ice Sheet (LIS) extent over Hudson Bay. • LIS retreat during T5 occurred over longer timescales than that for T2 and T1. • LIS deglaciation played important role in protracted nature of T5 sea-level rise. • Ice retreat during T1 may not be applicable template for older terminations in GIA modelling. Termination (T) 5, ∼424 ka, involved the biggest deglaciation of land-ice mass during the Quaternary. Warming and ice-sheet retreat during T5 led to an exceptionally long period of interglacial warmth known as Marine Isotope Stage (MIS) 11, ∼424–395 ka. A detailed understanding of the history of continental ice-sheet decay during T5 is required to disentangle regional contributions of ice-sheet retreat to sea-level rise (that range between ∼1 and 13 m above present day) and to correct it for glacio-isostatic adjustments (GIA). Yet little is known about the timing and magnitude of retreat during this time of the volumetrically most important continental ice sheet in the Northern Hemisphere, the Laurentide Ice Sheet (LIS). Here we present new authigenic Fe-Mn oxyhydroxide-derived high-resolution records of Pb isotope data and associated rare earth element profiles for samples spanning T5 from Labrador Sea IODP Site U1302/3. These records feature astronomically-paced radiogenic Pb isotope excursions that track increases in chemical weathering of North American bedrock and freshwater routing to the Labrador Sea via Hudson Straits associated with LIS retreat. Our records show that LIS retreat during T5 began 429. 2 ± 7.9 ka (2σ) and likely occurred over a longer timescale (by ∼10 to 5 kyr) than that observed for T2 and T1. They also show that Hudson Bay Ice Saddle collapse (and therefore LIS break-up) occurred ∼419 ± 4.7 ka (2σ), around the same time as best estimates of southern Greenland deglaciation, but ∼12 kyr before LIS deglaciation and the sea-level high-stand associated with the ... |
format |
Article in Journal/Newspaper |
author |
Parker, Rebecca L. Foster, Gavin L. Gutjahr, Marcus Wilson, Paul A. Obrochta, Stephen P. Fagel, Nathalie Cooper, Matthew J. Michalik, Agnes Milton, James A. Bailey, Ian |
spellingShingle |
Parker, Rebecca L. Foster, Gavin L. Gutjahr, Marcus Wilson, Paul A. Obrochta, Stephen P. Fagel, Nathalie Cooper, Matthew J. Michalik, Agnes Milton, James A. Bailey, Ian The history of ice-sheet retreat on North America during Termination 5: Implications for the origin of the sea-level highstand during interglacial stage 11 |
author_facet |
Parker, Rebecca L. Foster, Gavin L. Gutjahr, Marcus Wilson, Paul A. Obrochta, Stephen P. Fagel, Nathalie Cooper, Matthew J. Michalik, Agnes Milton, James A. Bailey, Ian |
author_sort |
Parker, Rebecca L. |
title |
The history of ice-sheet retreat on North America during Termination 5: Implications for the origin of the sea-level highstand during interglacial stage 11 |
title_short |
The history of ice-sheet retreat on North America during Termination 5: Implications for the origin of the sea-level highstand during interglacial stage 11 |
title_full |
The history of ice-sheet retreat on North America during Termination 5: Implications for the origin of the sea-level highstand during interglacial stage 11 |
title_fullStr |
The history of ice-sheet retreat on North America during Termination 5: Implications for the origin of the sea-level highstand during interglacial stage 11 |
title_full_unstemmed |
The history of ice-sheet retreat on North America during Termination 5: Implications for the origin of the sea-level highstand during interglacial stage 11 |
title_sort |
history of ice-sheet retreat on north america during termination 5: implications for the origin of the sea-level highstand during interglacial stage 11 |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://oceanrep.geomar.de/id/eprint/58975/ https://oceanrep.geomar.de/id/eprint/58975/1/1-s2.0-S0012821X23002996-main.pdf https://oceanrep.geomar.de/id/eprint/58975/2/ScienceDirect_files_24Jul2023_07-26-10.835.zip https://doi.org/10.1016/j.epsl.2023.118286 |
geographic |
Greenland Hudson Hudson Bay |
geographic_facet |
Greenland Hudson Hudson Bay |
genre |
Greenland Hudson Bay Ice Sheet Labrador Sea |
genre_facet |
Greenland Hudson Bay Ice Sheet Labrador Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/58975/1/1-s2.0-S0012821X23002996-main.pdf https://oceanrep.geomar.de/id/eprint/58975/2/ScienceDirect_files_24Jul2023_07-26-10.835.zip Parker, R. L., Foster, G. L., Gutjahr, M. , Wilson, P. A., Obrochta, S. P., Fagel, N., Cooper, M. J., Michalik, A., Milton, J. A. and Bailey, I. (2023) The history of ice-sheet retreat on North America during Termination 5: Implications for the origin of the sea-level highstand during interglacial stage 11. Open Access Earth and Planetary Science Letters, 618 . Art.Nr. 118286. DOI 10.1016/j.epsl.2023.118286 <https://doi.org/10.1016/j.epsl.2023.118286>. doi:10.1016/j.epsl.2023.118286 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2023.118286 |
container_title |
Earth and Planetary Science Letters |
container_volume |
618 |
container_start_page |
118286 |
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1790601078276882432 |