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...
Published in: | Paleoceanography and Paleoclimatology |
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Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2019
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/improving-north-atlantic-marine-core-chronologies-using-230thnormalization(0517fb67-31c1-4060-a4fb-f4395e9eee07).html https://doi.org/10.1029/2018PA003444 https://research-repository.st-andrews.ac.uk/bitstream/10023/18078/1/Missaien_2019_PP_Corechronlogies_CC.pdf |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/0517fb67-31c1-4060-a4fb-f4395e9eee07 2024-06-23T07:53:18+00:00 Improving North Atlantic marine core chronologies using 230 Th-normalization Missiaen, Lise Waelbroeck, C. Pichat, S. Jaccard, S. L. Eynaud, F. Greenop, Rosanna Burke, Andrea 2019-07-10 application/pdf https://research-portal.st-andrews.ac.uk/en/researchoutput/improving-north-atlantic-marine-core-chronologies-using-230thnormalization(0517fb67-31c1-4060-a4fb-f4395e9eee07).html https://doi.org/10.1029/2018PA003444 https://research-repository.st-andrews.ac.uk/bitstream/10023/18078/1/Missaien_2019_PP_Corechronlogies_CC.pdf eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/improving-north-atlantic-marine-core-chronologies-using-230thnormalization(0517fb67-31c1-4060-a4fb-f4395e9eee07).html info:eu-repo/semantics/openAccess Missiaen , L , Waelbroeck , C , Pichat , S , Jaccard , S L , Eynaud , F , Greenop , R & Burke , A 2019 , ' Improving North Atlantic marine core chronologies using 230 Th-normalization ' , Paleoceanography and Paleoclimatology , vol. 34 . https://doi.org/10.1029/2018PA003444 Th-normalization North Atlantic marine chronologies article 2019 ftunstandrewcris https://doi.org/10.1029/2018PA003444 2024-06-13T01:06:44Z 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 (HS1) 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. Article in Journal/Newspaper Greenland Greenland ice core ice core North Atlantic University of St Andrews: Research Portal Greenland Paleoceanography and Paleoclimatology 34 7 1057 1073 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Th-normalization North Atlantic marine chronologies |
spellingShingle |
Th-normalization North Atlantic marine chronologies Missiaen, Lise Waelbroeck, C. Pichat, S. Jaccard, S. L. Eynaud, F. Greenop, Rosanna Burke, Andrea Improving North Atlantic marine core chronologies using 230 Th-normalization |
topic_facet |
Th-normalization North Atlantic marine chronologies |
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 (HS1) 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 |
Article in Journal/Newspaper |
author |
Missiaen, Lise Waelbroeck, C. Pichat, S. Jaccard, S. L. Eynaud, F. Greenop, Rosanna Burke, Andrea |
author_facet |
Missiaen, Lise Waelbroeck, C. Pichat, S. Jaccard, S. L. Eynaud, F. Greenop, Rosanna Burke, Andrea |
author_sort |
Missiaen, Lise |
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 |
publishDate |
2019 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/improving-north-atlantic-marine-core-chronologies-using-230thnormalization(0517fb67-31c1-4060-a4fb-f4395e9eee07).html https://doi.org/10.1029/2018PA003444 https://research-repository.st-andrews.ac.uk/bitstream/10023/18078/1/Missaien_2019_PP_Corechronlogies_CC.pdf |
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_source |
Missiaen , L , Waelbroeck , C , Pichat , S , Jaccard , S L , Eynaud , F , Greenop , R & Burke , A 2019 , ' Improving North Atlantic marine core chronologies using 230 Th-normalization ' , Paleoceanography and Paleoclimatology , vol. 34 . https://doi.org/10.1029/2018PA003444 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/improving-north-atlantic-marine-core-chronologies-using-230thnormalization(0517fb67-31c1-4060-a4fb-f4395e9eee07).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2018PA003444 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
34 |
container_issue |
7 |
container_start_page |
1057 |
op_container_end_page |
1073 |
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1802644889990594560 |