Improving North Atlantic Marine Core Chronologies Using 230Th 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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ftdatacite:10.7892/boris.131982 2023-05-15T16:28:14+02:00 Improving North Atlantic Marine Core Chronologies Using 230Th Normalization Missiaen, L. Waelbroeck, C. Pichat, S. Jaccard, Samuel Eynaud, Frederique Greenop, Rossana Burke, Andrea 2019 application/pdf https://dx.doi.org/10.7892/boris.131982 https://boris.unibe.ch/131982/ en eng American Geophysical Union info:eu-repo/semantics/openAccess 550 Earth sciences & geology Text article-journal ScholarlyArticle 2019 ftdatacite https://doi.org/10.7892/boris.131982 2021-11-05T12:55:41Z 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 (14C) can be used as an absolute dating tool. However, in the northern North Atlantic, calendar ages cannot be directly derived from 14C 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 230Th 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 Ca2+ 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 14C surface reservoir age. Text Greenland Greenland ice core ice core North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Greenland |
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English |
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550 Earth sciences & geology |
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550 Earth sciences & geology Missiaen, L. Waelbroeck, C. Pichat, S. Jaccard, Samuel Eynaud, Frederique Greenop, Rossana Burke, Andrea Improving North Atlantic Marine Core Chronologies Using 230Th Normalization |
topic_facet |
550 Earth sciences & geology |
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 (14C) can be used as an absolute dating tool. However, in the northern North Atlantic, calendar ages cannot be directly derived from 14C 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 230Th 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 Ca2+ 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 14C surface reservoir age. |
format |
Text |
author |
Missiaen, L. Waelbroeck, C. Pichat, S. Jaccard, Samuel Eynaud, Frederique Greenop, Rossana Burke, Andrea |
author_facet |
Missiaen, L. Waelbroeck, C. Pichat, S. Jaccard, Samuel Eynaud, Frederique Greenop, Rossana Burke, Andrea |
author_sort |
Missiaen, L. |
title |
Improving North Atlantic Marine Core Chronologies Using 230Th Normalization |
title_short |
Improving North Atlantic Marine Core Chronologies Using 230Th Normalization |
title_full |
Improving North Atlantic Marine Core Chronologies Using 230Th Normalization |
title_fullStr |
Improving North Atlantic Marine Core Chronologies Using 230Th Normalization |
title_full_unstemmed |
Improving North Atlantic Marine Core Chronologies Using 230Th Normalization |
title_sort |
improving north atlantic marine core chronologies using 230th normalization |
publisher |
American Geophysical Union |
publishDate |
2019 |
url |
https://dx.doi.org/10.7892/boris.131982 https://boris.unibe.ch/131982/ |
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_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.7892/boris.131982 |
_version_ |
1766017863382990848 |