Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea

The accumulation of an Organic Rich Layer (ORL) during the last deglaciation in the Alboran Sea (western Mediterranean Sea) and its link to changes in deep and intermediate water circulation are here investigated. Benthic foraminiferal assemblages and the shallow infaunal foraminifer Uvigerina pereg...

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Autores: Pérez-Asensio, José N. (José Noel), Frigola Ferrer, Jaime I., Pena González, Leopoldo David, Sierro Sánchez, Francisco Javier, Reguera, M. I., Rodríguez Tovar, Francisco J., Dorador, Javier, Asioli, Alessandra, Kuhlmann, Jannis, Huhn, Katrin, Cacho Lascorz, Isabel
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/174503
Acesso em linha:https://hdl.handle.net/2445/174503
Access Level:acceso abierto
Palavra-chave:Micropaleontologia
Foraminífers
Isòtops
Paleoceanografia
Micropaleontology
Foraminifera
Isotopes
Paleoceanography
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spelling Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran SeaPérez-Asensio, José N. (José Noel)Frigola Ferrer, Jaime I.Pena González, Leopoldo DavidSierro Sánchez, Francisco JavierReguera, M. I.Rodríguez Tovar, Francisco J.Dorador, JavierAsioli, AlessandraKuhlmann, JannisHuhn, KatrinCacho Lascorz, IsabelMicropaleontologiaForaminífersIsòtopsPaleoceanografiaMicropaleontologyForaminiferaIsotopesPaleoceanographyThe accumulation of an Organic Rich Layer (ORL) during the last deglaciation in the Alboran Sea (western Mediterranean Sea) and its link to changes in deep and intermediate water circulation are here investigated. Benthic foraminiferal assemblages and the shallow infaunal foraminifer Uvigerina peregrina d13C record support the establishment of sustained high organic matter fluxes, and thus eutrophic conditions at the sea floor, during the late phase of the ORL (Younger Dryas to early Holocene periods). Since organic matter fluxes were lower (mesotrophic conditions) during the Bølling-Allerød period, they cannot be solely responsible for the ORL initiation. Geochemical, sedimentological and micropalaeontological proxies support a major weakening of the deep-water convection in the Gulf of Lion as the main driver for the development of poorly-ventilated conditions from intermediate depths (946 m) to the deep western Mediterranean basin that promoted the beginning of the ORL deposition. Nevertheless, a better ventilation at intermediate depths was established during the late ORL, while the deep basin remained poorly ventilated. We propose that our data reflect the arrival of a new better-ventilated intermediate water mass analogue to the current Levantine Intermediate Water (LIW) and/or a new intermediate water mass from the Gulf of Lion. The ultimate source of this water mass needs to be further explored but chronologies of the changes recorded here indicate that intermediate and deep ventilation phases were decoupled between the western and eastern Mediterranean basins during the deglaciation and earlymiddle Holocene.Elsevier Ltd2021202120202021info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersioninfo:eu-repo/semantics/publishedVersion16 p.application/pdfhttps://hdl.handle.net/2445/174503Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1016/j.quascirev.2019.106075Quaternary Science Reviews, 2020, vol. 228, p. 106075https://doi.org/10.1016/j.quascirev.2019.106075info:eu-repo/grantAgreement/EC/H2020/683237cc-by-nc-nd (c) Pérez-Asensio et. al., 2020http://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1745032026-05-29T05:05:01Z
dc.title.none.fl_str_mv Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea
title Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea
spellingShingle Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea
Pérez-Asensio, José N. (José Noel)
Micropaleontologia
Foraminífers
Isòtops
Paleoceanografia
Micropaleontology
Foraminifera
Isotopes
Paleoceanography
title_short Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea
title_full Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea
title_fullStr Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea
title_full_unstemmed Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea
title_sort Changes in western Mediterranean thermohaline circulation in association with a deglacial Organic Rich Layer formation in the Alboran Sea
dc.creator.none.fl_str_mv Pérez-Asensio, José N. (José Noel)
Frigola Ferrer, Jaime I.
Pena González, Leopoldo David
Sierro Sánchez, Francisco Javier
Reguera, M. I.
Rodríguez Tovar, Francisco J.
Dorador, Javier
Asioli, Alessandra
Kuhlmann, Jannis
Huhn, Katrin
Cacho Lascorz, Isabel
author Pérez-Asensio, José N. (José Noel)
author_facet Pérez-Asensio, José N. (José Noel)
Frigola Ferrer, Jaime I.
Pena González, Leopoldo David
Sierro Sánchez, Francisco Javier
Reguera, M. I.
Rodríguez Tovar, Francisco J.
Dorador, Javier
Asioli, Alessandra
Kuhlmann, Jannis
Huhn, Katrin
Cacho Lascorz, Isabel
author_role author
author2 Frigola Ferrer, Jaime I.
Pena González, Leopoldo David
Sierro Sánchez, Francisco Javier
Reguera, M. I.
Rodríguez Tovar, Francisco J.
Dorador, Javier
Asioli, Alessandra
Kuhlmann, Jannis
Huhn, Katrin
Cacho Lascorz, Isabel
author2_role author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Micropaleontologia
Foraminífers
Isòtops
Paleoceanografia
Micropaleontology
Foraminifera
Isotopes
Paleoceanography
topic Micropaleontologia
Foraminífers
Isòtops
Paleoceanografia
Micropaleontology
Foraminifera
Isotopes
Paleoceanography
description The accumulation of an Organic Rich Layer (ORL) during the last deglaciation in the Alboran Sea (western Mediterranean Sea) and its link to changes in deep and intermediate water circulation are here investigated. Benthic foraminiferal assemblages and the shallow infaunal foraminifer Uvigerina peregrina d13C record support the establishment of sustained high organic matter fluxes, and thus eutrophic conditions at the sea floor, during the late phase of the ORL (Younger Dryas to early Holocene periods). Since organic matter fluxes were lower (mesotrophic conditions) during the Bølling-Allerød period, they cannot be solely responsible for the ORL initiation. Geochemical, sedimentological and micropalaeontological proxies support a major weakening of the deep-water convection in the Gulf of Lion as the main driver for the development of poorly-ventilated conditions from intermediate depths (946 m) to the deep western Mediterranean basin that promoted the beginning of the ORL deposition. Nevertheless, a better ventilation at intermediate depths was established during the late ORL, while the deep basin remained poorly ventilated. We propose that our data reflect the arrival of a new better-ventilated intermediate water mass analogue to the current Levantine Intermediate Water (LIW) and/or a new intermediate water mass from the Gulf of Lion. The ultimate source of this water mass needs to be further explored but chronologies of the changes recorded here indicate that intermediate and deep ventilation phases were decoupled between the western and eastern Mediterranean basins during the deglaciation and earlymiddle Holocene.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
info:eu-repo/semantics/publishedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/174503
url https://hdl.handle.net/2445/174503
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1016/j.quascirev.2019.106075
Quaternary Science Reviews, 2020, vol. 228, p. 106075
https://doi.org/10.1016/j.quascirev.2019.106075
info:eu-repo/grantAgreement/EC/H2020/683237
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Pérez-Asensio et. al., 2020
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Pérez-Asensio et. al., 2020
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 16 p.
application/pdf
dc.publisher.none.fl_str_mv Elsevier Ltd
publisher.none.fl_str_mv Elsevier Ltd
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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