Improving North Atlantic Marine Core Chronologies Using (230)Th Normalization
Producing independent and accurate chronologies for marine sediments is a prerequisite to understand the sequence of millennial‐scale events and reveal potential temporal offsets between marine and continental records, or between different marine records, possibly from different regions. The last 40...
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ftpubmed:oai:pubmedcentral.nih.gov:6774303 2023-05-15T16:28:16+02:00 Improving North Atlantic Marine Core Chronologies Using (230)Th Normalization Missiaen, L. Waelbroeck, C. Pichat, S. Jaccard, S. L. Eynaud, F. Greenop, R. Burke, A. 2019-07-10 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6774303/ https://doi.org/10.1029/2018PA003444 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6774303/ http://dx.doi.org/10.1029/2018PA003444 © 2019. The Authors. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. CC-BY-NC-ND Research Articles Text 2019 ftpubmed https://doi.org/10.1029/2018PA003444 2019-10-13T00:20:12Z Producing independent and accurate chronologies for marine sediments is a prerequisite to understand the sequence of millennial‐scale events and reveal potential temporal offsets between marine and continental records, or between different marine records, possibly from different regions. The last 40 ky is a generally well‐constrained period since radiocarbon ((14)C) can be used as an absolute dating tool. However, in the northern North Atlantic, calendar ages cannot be directly derived from (14)C ages, due to temporal and spatial variations of surface reservoir ages. Alternatively, chronologies can be derived by aligning Greenland ice‐core time series with marine surface records. Yet this approach suffers from the lack of clearly defined climatic events between 14.7 and 23.3 cal ky BP (hereafter ka), a crucial period encompassing Heinrich Stadial 1 and the onset of the last deglaciation. In this study, (i) we assess the benefits of (230)Th normalization to refine the sedimentation history between surface temperature alignment tie points and (ii) revisit the chronologies of three North Atlantic marine records. Our study supports the contention that the marked increase in the Greenland Ca(2+) record at 17.48 ka ± 0.21 ky (1σ) occurred within dating uncertainty of sea surface temperature cooling in the North Atlantic at the onset of Heinrich Stadial 1. This sharp feature might be useful for future chronostratigraphic alignments to remedy the lack of chronological constraint between 14.7 and 23.3 ka for North Atlantic marine records that are subject to large changes in (14)C surface reservoir age. Text Greenland Greenland ice core ice core North Atlantic PubMed Central (PMC) Greenland Paleoceanography and Paleoclimatology 34 7 1057 1073 |
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Research Articles Missiaen, L. Waelbroeck, C. Pichat, S. Jaccard, S. L. Eynaud, F. Greenop, R. Burke, A. Improving North Atlantic Marine Core Chronologies Using (230)Th Normalization |
topic_facet |
Research Articles |
description |
Producing independent and accurate chronologies for marine sediments is a prerequisite to understand the sequence of millennial‐scale events and reveal potential temporal offsets between marine and continental records, or between different marine records, possibly from different regions. The last 40 ky is a generally well‐constrained period since radiocarbon ((14)C) can be used as an absolute dating tool. However, in the northern North Atlantic, calendar ages cannot be directly derived from (14)C ages, due to temporal and spatial variations of surface reservoir ages. Alternatively, chronologies can be derived by aligning Greenland ice‐core time series with marine surface records. Yet this approach suffers from the lack of clearly defined climatic events between 14.7 and 23.3 cal ky BP (hereafter ka), a crucial period encompassing Heinrich Stadial 1 and the onset of the last deglaciation. In this study, (i) we assess the benefits of (230)Th normalization to refine the sedimentation history between surface temperature alignment tie points and (ii) revisit the chronologies of three North Atlantic marine records. Our study supports the contention that the marked increase in the Greenland Ca(2+) record at 17.48 ka ± 0.21 ky (1σ) occurred within dating uncertainty of sea surface temperature cooling in the North Atlantic at the onset of Heinrich Stadial 1. This sharp feature might be useful for future chronostratigraphic alignments to remedy the lack of chronological constraint between 14.7 and 23.3 ka for North Atlantic marine records that are subject to large changes in (14)C surface reservoir age. |
format |
Text |
author |
Missiaen, L. Waelbroeck, C. Pichat, S. Jaccard, S. L. Eynaud, F. Greenop, R. Burke, A. |
author_facet |
Missiaen, L. Waelbroeck, C. Pichat, S. Jaccard, S. L. Eynaud, F. Greenop, R. Burke, A. |
author_sort |
Missiaen, L. |
title |
Improving North Atlantic Marine Core Chronologies Using (230)Th Normalization |
title_short |
Improving North Atlantic Marine Core Chronologies Using (230)Th Normalization |
title_full |
Improving North Atlantic Marine Core Chronologies Using (230)Th Normalization |
title_fullStr |
Improving North Atlantic Marine Core Chronologies Using (230)Th Normalization |
title_full_unstemmed |
Improving North Atlantic Marine Core Chronologies Using (230)Th Normalization |
title_sort |
improving north atlantic marine core chronologies using (230)th normalization |
publisher |
John Wiley and Sons Inc. |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6774303/ https://doi.org/10.1029/2018PA003444 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core ice core North Atlantic |
genre_facet |
Greenland Greenland ice core ice core North Atlantic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6774303/ http://dx.doi.org/10.1029/2018PA003444 |
op_rights |
© 2019. The Authors. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1029/2018PA003444 |
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Paleoceanography and Paleoclimatology |
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34 |
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7 |
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1057 |
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1073 |
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1766017901100269568 |