Revising chronological uncertainties in marine archives using global anthropogenic signals: a case study
Marine sediments are excellent archives for reconstructing past changes in climate and ocean circulation. Overlapping with instrumental records they hold the potential to elucidate natural variability and contextualize current changes. Yet, dating uncertainties of traditional approaches (e.g., up to...
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00070554 2024-01-14T10:09:03+01:00 Revising chronological uncertainties in marine archives using global anthropogenic signals: a case study Irvalı, Nil Ninnemann, Ulysses S. Olsen, Are Rose, Neil L. Thornalley, David J. R. Mjell, Tor L. Counillon, François 2023-12 electronic https://doi.org/10.5194/egusphere-2023-2845 https://noa.gwlb.de/receive/cop_mods_00070554 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068901/egusphere-2023-2845.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2845/egusphere-2023-2845.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-2845 https://noa.gwlb.de/receive/cop_mods_00070554 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068901/egusphere-2023-2845.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2845/egusphere-2023-2845.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-2845 2023-12-18T00:22:44Z Marine sediments are excellent archives for reconstructing past changes in climate and ocean circulation. Overlapping with instrumental records they hold the potential to elucidate natural variability and contextualize current changes. Yet, dating uncertainties of traditional approaches (e.g., up to ± 30–50 years, for the last two centuries) pose major challenges for integrating the shorter instrumental records with these extended marine archives. Hence, robust sediment chronologies are crucial and most existing age model constraints do not provide sufficient age control, particularly for the 20th century, which is the most critical period for comparing proxy records to historical changes. Here we propose a novel chronostratigraphic approach that uses anthropogenic signals such as the oceanic 13C Suess effect and spheroidal carbonaceous fly ash particles to reduce age model uncertainties in high-resolution marine archives. As a test, we apply this new approach to a marine sediment core located at the Gardar Drift, in the subpolar North Atlantic, and revise the previously published age model for this site. We further provide refined estimate of regional reservoir corrections and uncertainties for Gardar Drift. Article in Journal/Newspaper North Atlantic Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Irvalı, Nil Ninnemann, Ulysses S. Olsen, Are Rose, Neil L. Thornalley, David J. R. Mjell, Tor L. Counillon, François Revising chronological uncertainties in marine archives using global anthropogenic signals: a case study |
topic_facet |
article Verlagsveröffentlichung |
description |
Marine sediments are excellent archives for reconstructing past changes in climate and ocean circulation. Overlapping with instrumental records they hold the potential to elucidate natural variability and contextualize current changes. Yet, dating uncertainties of traditional approaches (e.g., up to ± 30–50 years, for the last two centuries) pose major challenges for integrating the shorter instrumental records with these extended marine archives. Hence, robust sediment chronologies are crucial and most existing age model constraints do not provide sufficient age control, particularly for the 20th century, which is the most critical period for comparing proxy records to historical changes. Here we propose a novel chronostratigraphic approach that uses anthropogenic signals such as the oceanic 13C Suess effect and spheroidal carbonaceous fly ash particles to reduce age model uncertainties in high-resolution marine archives. As a test, we apply this new approach to a marine sediment core located at the Gardar Drift, in the subpolar North Atlantic, and revise the previously published age model for this site. We further provide refined estimate of regional reservoir corrections and uncertainties for Gardar Drift. |
format |
Article in Journal/Newspaper |
author |
Irvalı, Nil Ninnemann, Ulysses S. Olsen, Are Rose, Neil L. Thornalley, David J. R. Mjell, Tor L. Counillon, François |
author_facet |
Irvalı, Nil Ninnemann, Ulysses S. Olsen, Are Rose, Neil L. Thornalley, David J. R. Mjell, Tor L. Counillon, François |
author_sort |
Irvalı, Nil |
title |
Revising chronological uncertainties in marine archives using global anthropogenic signals: a case study |
title_short |
Revising chronological uncertainties in marine archives using global anthropogenic signals: a case study |
title_full |
Revising chronological uncertainties in marine archives using global anthropogenic signals: a case study |
title_fullStr |
Revising chronological uncertainties in marine archives using global anthropogenic signals: a case study |
title_full_unstemmed |
Revising chronological uncertainties in marine archives using global anthropogenic signals: a case study |
title_sort |
revising chronological uncertainties in marine archives using global anthropogenic signals: a case study |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-2845 https://noa.gwlb.de/receive/cop_mods_00070554 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068901/egusphere-2023-2845.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2845/egusphere-2023-2845.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://doi.org/10.5194/egusphere-2023-2845 https://noa.gwlb.de/receive/cop_mods_00070554 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068901/egusphere-2023-2845.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2845/egusphere-2023-2845.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2023-2845 |
_version_ |
1788063486284136448 |