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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American Geophysical Union (AGU)
2019
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Online Access: | http://hdl.handle.net/1959.4/unsworks_62295 https://unsworks.unsw.edu.au/bitstreams/da7f87ba-d0fa-40c2-a3e7-70b823f27323/download https://doi.org/10.1029/2018PA003444 |
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ftunswworks:oai:unsworks.library.unsw.edu.au:1959.4/unsworks_62295 2024-05-19T07:41:17+00:00 Improving North Atlantic Marine Core Chronologies Using 230 Th Normalization Missiaen, L Waelbroeck, C Pichat, S Jaccard, SL Eynaud, F Greenop, R Burke, A 2019-01-01 application/pdf http://hdl.handle.net/1959.4/unsworks_62295 https://unsworks.unsw.edu.au/bitstreams/da7f87ba-d0fa-40c2-a3e7-70b823f27323/download https://doi.org/10.1029/2018PA003444 unknown American Geophysical Union (AGU) http://hdl.handle.net/1959.4/unsworks_62295 https://unsworks.unsw.edu.au/bitstreams/da7f87ba-d0fa-40c2-a3e7-70b823f27323/download https://doi.org/10.1029/2018PA003444 open access https://purl.org/coar/access_right/c_abf2 CC BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/ free_to_read urn:ISSN:2572-4517 urn:ISSN:2572-4525 Paleoceanography and Paleoclimatology, 34, 7, 1057-1073 14 Life Below Water North Atlantic marine chronologies Th normalization journal article http://purl.org/coar/resource_type/c_6501 2019 ftunswworks https://doi.org/10.1029/2018PA003444 2024-04-24T01:09:24Z 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. Article in Journal/Newspaper Greenland Greenland ice core ice core North Atlantic UNSW Sydney (The University of New South Wales): UNSWorks Paleoceanography and Paleoclimatology 34 7 1057 1073 |
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Open Polar |
collection |
UNSW Sydney (The University of New South Wales): UNSWorks |
op_collection_id |
ftunswworks |
language |
unknown |
topic |
14 Life Below Water North Atlantic marine chronologies Th normalization |
spellingShingle |
14 Life Below Water North Atlantic marine chronologies Th normalization Missiaen, L Waelbroeck, C Pichat, S Jaccard, SL Eynaud, F Greenop, R Burke, A Improving North Atlantic Marine Core Chronologies Using 230 Th Normalization |
topic_facet |
14 Life Below Water North Atlantic marine chronologies Th normalization |
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 |
Article in Journal/Newspaper |
author |
Missiaen, L Waelbroeck, C Pichat, S Jaccard, SL Eynaud, F Greenop, R Burke, A |
author_facet |
Missiaen, L Waelbroeck, C Pichat, S Jaccard, SL 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 |
American Geophysical Union (AGU) |
publishDate |
2019 |
url |
http://hdl.handle.net/1959.4/unsworks_62295 https://unsworks.unsw.edu.au/bitstreams/da7f87ba-d0fa-40c2-a3e7-70b823f27323/download https://doi.org/10.1029/2018PA003444 |
genre |
Greenland Greenland ice core ice core North Atlantic |
genre_facet |
Greenland Greenland ice core ice core North Atlantic |
op_source |
urn:ISSN:2572-4517 urn:ISSN:2572-4525 Paleoceanography and Paleoclimatology, 34, 7, 1057-1073 |
op_relation |
http://hdl.handle.net/1959.4/unsworks_62295 https://unsworks.unsw.edu.au/bitstreams/da7f87ba-d0fa-40c2-a3e7-70b823f27323/download https://doi.org/10.1029/2018PA003444 |
op_rights |
open access https://purl.org/coar/access_right/c_abf2 CC BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/ free_to_read |
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 |
_version_ |
1799480875111415808 |