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Pre-aged terrigenous organic carbon biases ocean ventilation-age reconstructions in the North Atlantic

Changes in ocean ventilation have been pivotal in regulating carbon sequestration and release on centennial to millennial timescales. However, paleoceanographic reconstructions documenting changes in deep-ocean ventilation using (14)C dating, may bear multidimensional explanations, obfuscating the r...

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Autores principales: Liu, Jingyu, Wang, Yipeng, Jaccard, Samuel L., Wang, Nan, Gong, Xun, Fang, Nianqiao, Bao, Rui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10290711/
https://www.ncbi.nlm.nih.gov/pubmed/37355680
http://dx.doi.org/10.1038/s41467-023-39490-6
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author Liu, Jingyu
Wang, Yipeng
Jaccard, Samuel L.
Wang, Nan
Gong, Xun
Fang, Nianqiao
Bao, Rui
author_facet Liu, Jingyu
Wang, Yipeng
Jaccard, Samuel L.
Wang, Nan
Gong, Xun
Fang, Nianqiao
Bao, Rui
author_sort Liu, Jingyu
collection PubMed
description Changes in ocean ventilation have been pivotal in regulating carbon sequestration and release on centennial to millennial timescales. However, paleoceanographic reconstructions documenting changes in deep-ocean ventilation using (14)C dating, may bear multidimensional explanations, obfuscating the roles of ocean ventilation played on climate evolution. Here, we show that previously inferred poorly ventilated conditions in the North Atlantic were linked to enhanced pre-aged organic carbon (OC) input during Heinrich Stadial 1 (HS1). The (14)C age of sedimentary OC was approximately 13,345 ± 692 years older than the coeval foraminifera in the central North Atlantic during HS1, which is coupled to a ventilation age of 5,169 ± 660 years. Old OC was mainly of terrigenous origin and exported to the North Atlantic by ice-rafting. Remineralization of old terrigenous OC in the ocean may have contributed to, at least in part, the anomalously old ventilation ages reported for the high-latitude North Atlantic during HS1.
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spelling pubmed-102907112023-06-26 Pre-aged terrigenous organic carbon biases ocean ventilation-age reconstructions in the North Atlantic Liu, Jingyu Wang, Yipeng Jaccard, Samuel L. Wang, Nan Gong, Xun Fang, Nianqiao Bao, Rui Nat Commun Article Changes in ocean ventilation have been pivotal in regulating carbon sequestration and release on centennial to millennial timescales. However, paleoceanographic reconstructions documenting changes in deep-ocean ventilation using (14)C dating, may bear multidimensional explanations, obfuscating the roles of ocean ventilation played on climate evolution. Here, we show that previously inferred poorly ventilated conditions in the North Atlantic were linked to enhanced pre-aged organic carbon (OC) input during Heinrich Stadial 1 (HS1). The (14)C age of sedimentary OC was approximately 13,345 ± 692 years older than the coeval foraminifera in the central North Atlantic during HS1, which is coupled to a ventilation age of 5,169 ± 660 years. Old OC was mainly of terrigenous origin and exported to the North Atlantic by ice-rafting. Remineralization of old terrigenous OC in the ocean may have contributed to, at least in part, the anomalously old ventilation ages reported for the high-latitude North Atlantic during HS1. Nature Publishing Group UK 2023-06-24 /pmc/articles/PMC10290711/ /pubmed/37355680 http://dx.doi.org/10.1038/s41467-023-39490-6 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Liu, Jingyu
Wang, Yipeng
Jaccard, Samuel L.
Wang, Nan
Gong, Xun
Fang, Nianqiao
Bao, Rui
Pre-aged terrigenous organic carbon biases ocean ventilation-age reconstructions in the North Atlantic
title Pre-aged terrigenous organic carbon biases ocean ventilation-age reconstructions in the North Atlantic
title_full Pre-aged terrigenous organic carbon biases ocean ventilation-age reconstructions in the North Atlantic
title_fullStr Pre-aged terrigenous organic carbon biases ocean ventilation-age reconstructions in the North Atlantic
title_full_unstemmed Pre-aged terrigenous organic carbon biases ocean ventilation-age reconstructions in the North Atlantic
title_short Pre-aged terrigenous organic carbon biases ocean ventilation-age reconstructions in the North Atlantic
title_sort pre-aged terrigenous organic carbon biases ocean ventilation-age reconstructions in the north atlantic
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10290711/
https://www.ncbi.nlm.nih.gov/pubmed/37355680
http://dx.doi.org/10.1038/s41467-023-39490-6
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