Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting

Benthic Cd/Ca and δ13C records from the midlatitude and northern North Atlantic are used to derive nutrient inventories and water mass distribution patterns for the past 50,000 years. Inferred Holocene water column Cd concentrations (CdW') and δ13C values are 0.17-0.24 nmol kg-1 and 1.0-1.3‰ Pe...

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Detalles Bibliográficos
Autores: Willamowski, Claudia, Zahn, Rainer
Tipo de recurso: artículo
Fecha de publicación:2000
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:25441
Acceso en línea:https://ddd.uab.cat/record/25441
https://dx.doi.org/urn:doi:10.1029/1999PA000467
Access Level:acceso abierto
Palabra clave:Water masses
Stable isotopes
Trace elements
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spelling Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprintingWillamowski, ClaudiaZahn, RainerWater massesStable isotopesTrace elementsBenthic Cd/Ca and δ13C records from the midlatitude and northern North Atlantic are used to derive nutrient inventories and water mass distribution patterns for the past 50,000 years. Inferred Holocene water column Cd concentrations (CdW') and δ13C values are 0.17-0.24 nmol kg-1 and 1.0-1.3‰ Peedee belemnite (PDB), which document the dominance of nutrient-depleted Mediterranean Outflow Water (MOW) and Upper North Atlantic Deep Water (UNADW). Glacial benthic Cd/Ca and δ13C indicate a continued contribution of UNADW to the northern North Atlantic and upper Portuguese margin (CdW'=0.08 nmol kg-1; δ13C=+1.86‰ PDB). At the upper Moroccan margin, glacial CdW' (0.23 nmol kg-1) is higher, and δ13C (+1.44‰ PDB) is lower. During "Heinrich" events, benthic δ13C decreases by up to 1.3‰, and peak Cd/Ca increases by 0.1-0.14 µmol mol-1; water column phosphorus equivalents are 1.8-2.8 µmol kg-1. The combined Cd/Ca and δ13C pattern indicates that during mean glacial conditions Antarctic Intermediate Water, (AAIW) reached the midlatitude northeast Atlantic (30°N). During Heinrich events, AAIW contribution maximized so that Southern Hemisphere waters filled the North Atlantic basin from bottom water to middepth levels. 22000-01-0120002000-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/25441https://dx.doi.org/urn:doi:10.1029/1999PA000467reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:254412026-06-06T12:50:31Z
dc.title.none.fl_str_mv Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting
title Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting
spellingShingle Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting
Willamowski, Claudia
Water masses
Stable isotopes
Trace elements
title_short Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting
title_full Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting
title_fullStr Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting
title_full_unstemmed Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting
title_sort Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting
dc.creator.none.fl_str_mv Willamowski, Claudia
Zahn, Rainer
author Willamowski, Claudia
author_facet Willamowski, Claudia
Zahn, Rainer
author_role author
author2 Zahn, Rainer
author2_role author
dc.subject.none.fl_str_mv Water masses
Stable isotopes
Trace elements
topic Water masses
Stable isotopes
Trace elements
description Benthic Cd/Ca and δ13C records from the midlatitude and northern North Atlantic are used to derive nutrient inventories and water mass distribution patterns for the past 50,000 years. Inferred Holocene water column Cd concentrations (CdW') and δ13C values are 0.17-0.24 nmol kg-1 and 1.0-1.3‰ Peedee belemnite (PDB), which document the dominance of nutrient-depleted Mediterranean Outflow Water (MOW) and Upper North Atlantic Deep Water (UNADW). Glacial benthic Cd/Ca and δ13C indicate a continued contribution of UNADW to the northern North Atlantic and upper Portuguese margin (CdW'=0.08 nmol kg-1; δ13C=+1.86‰ PDB). At the upper Moroccan margin, glacial CdW' (0.23 nmol kg-1) is higher, and δ13C (+1.44‰ PDB) is lower. During "Heinrich" events, benthic δ13C decreases by up to 1.3‰, and peak Cd/Ca increases by 0.1-0.14 µmol mol-1; water column phosphorus equivalents are 1.8-2.8 µmol kg-1. The combined Cd/Ca and δ13C pattern indicates that during mean glacial conditions Antarctic Intermediate Water, (AAIW) reached the midlatitude northeast Atlantic (30°N). During Heinrich events, AAIW contribution maximized so that Southern Hemisphere waters filled the North Atlantic basin from bottom water to middepth levels.
publishDate 2000
dc.date.none.fl_str_mv 2
2000-01-01
2000
2000-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/25441
https://dx.doi.org/urn:doi:10.1029/1999PA000467
url https://ddd.uab.cat/record/25441
https://dx.doi.org/urn:doi:10.1029/1999PA000467
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
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