Efficient Organic Carbon Burial by Bottom Currents in the Ocean: A Potential Role in Climate Modulation

Bottom currents play a major role in deep-sea sedimentation, but their significance in the burial of organic carbon is poorly quantified at a global scale. Here we show that Holocene fluxes of organic carbon into the contourite drifts are high, with a global average of 0.09 g cm−2 Kyr−1. At individu...

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Autores: Yin, Shaoru, Hernández-Molina, F. Javier, Fan, Weijia, Li, Jiabiao
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/365709
Acceso en línea:http://hdl.handle.net/10261/365709
Access Level:acceso abierto
Palabra clave:Bottom current
Contourite drift
Ocean circulation
Organic carbon burial
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spelling Efficient Organic Carbon Burial by Bottom Currents in the Ocean: A Potential Role in Climate ModulationYin, ShaoruHernández-Molina, F. JavierFan, WeijiaLi, JiabiaoBottom currentContourite driftOcean circulationOrganic carbon burialBottom currents play a major role in deep-sea sedimentation, but their significance in the burial of organic carbon is poorly quantified at a global scale. Here we show that Holocene fluxes of organic carbon into the contourite drifts are high, with a global average of 0.09 g cm−2 Kyr−1. At individual drift sites, fluxes are commonly 1–2 orders of magnitude greater than rates in surrounding areas and in global depth-similar zones. These high fluxes of organic carbon into the contourite drifts are due to high rates of sedimentation. Over the past 50 million years, sedimentation rates at the studied contourite drift sites have overall increased, coincident with decreasing atmospheric CO2 and a cooling global climate. Our work suggests that a ramp-up of the bottom-current carbon pump has accelerated removal of CO2 from the atmosphere and oceanic water, thus contributing to the overall global cooling after the Eocene Thermal Maximum.This research was funded by National Key R&D Program of China (Grant 2023YFC2811203), the National Natural Science Foundation of China (Grant 41706043), State Key Laboratory of Marine Geology, Tongji University (Grant MGK202414), Zhejiang Provincial Natural Science Foundation of China (Grant LR24D060001). The study was conducted within the framework of \u201CThe Drifters\u201D Research Group of the CSIC-IACT (Granada, Spain).Peer reviewedWiley-VCHNational Key Research and Development Program (China)National Natural Science Foundation of ChinaTongji UniversityConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/365709reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1029/2024GL109444Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3657092026-05-22T06:33:51Z
dc.title.none.fl_str_mv Efficient Organic Carbon Burial by Bottom Currents in the Ocean: A Potential Role in Climate Modulation
title Efficient Organic Carbon Burial by Bottom Currents in the Ocean: A Potential Role in Climate Modulation
spellingShingle Efficient Organic Carbon Burial by Bottom Currents in the Ocean: A Potential Role in Climate Modulation
Yin, Shaoru
Bottom current
Contourite drift
Ocean circulation
Organic carbon burial
title_short Efficient Organic Carbon Burial by Bottom Currents in the Ocean: A Potential Role in Climate Modulation
title_full Efficient Organic Carbon Burial by Bottom Currents in the Ocean: A Potential Role in Climate Modulation
title_fullStr Efficient Organic Carbon Burial by Bottom Currents in the Ocean: A Potential Role in Climate Modulation
title_full_unstemmed Efficient Organic Carbon Burial by Bottom Currents in the Ocean: A Potential Role in Climate Modulation
title_sort Efficient Organic Carbon Burial by Bottom Currents in the Ocean: A Potential Role in Climate Modulation
dc.creator.none.fl_str_mv Yin, Shaoru
Hernández-Molina, F. Javier
Fan, Weijia
Li, Jiabiao
author Yin, Shaoru
author_facet Yin, Shaoru
Hernández-Molina, F. Javier
Fan, Weijia
Li, Jiabiao
author_role author
author2 Hernández-Molina, F. Javier
Fan, Weijia
Li, Jiabiao
author2_role author
author
author
dc.contributor.none.fl_str_mv National Key Research and Development Program (China)
National Natural Science Foundation of China
Tongji University
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Bottom current
Contourite drift
Ocean circulation
Organic carbon burial
topic Bottom current
Contourite drift
Ocean circulation
Organic carbon burial
description Bottom currents play a major role in deep-sea sedimentation, but their significance in the burial of organic carbon is poorly quantified at a global scale. Here we show that Holocene fluxes of organic carbon into the contourite drifts are high, with a global average of 0.09 g cm−2 Kyr−1. At individual drift sites, fluxes are commonly 1–2 orders of magnitude greater than rates in surrounding areas and in global depth-similar zones. These high fluxes of organic carbon into the contourite drifts are due to high rates of sedimentation. Over the past 50 million years, sedimentation rates at the studied contourite drift sites have overall increased, coincident with decreasing atmospheric CO2 and a cooling global climate. Our work suggests that a ramp-up of the bottom-current carbon pump has accelerated removal of CO2 from the atmosphere and oceanic water, thus contributing to the overall global cooling after the Eocene Thermal Maximum.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/365709
url http://hdl.handle.net/10261/365709
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1029/2024GL109444
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Wiley-VCH
publisher.none.fl_str_mv Wiley-VCH
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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