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...
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Language: | English |
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ftuabarcelonapb:oai:ddd.uab.cat:25441 2024-09-30T14:23:39+00:00 Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting Willamowski, Claudia Zahn, Rainer 2000 application/pdf https://ddd.uab.cat/record/25441 eng eng Paleoceanography Vol. 15, Issue 5 (2000), p. 515-527 https://ddd.uab.cat/record/25441 urn:10.1029/1999PA000467 urn:oai:ddd.uab.cat:25441 urn:recercauab:ARE-28260 urn:articleid:19449186v15n5p515 urn:scopus_id:0034451256 urn:wos_id:000089581200005 urn:oai:egreta.uab.cat:publications/cca8ca7f-caed-4c5c-b11d-70db11bf0896 open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ Water masses Stable isotopes Trace elements Article 2000 ftuabarcelonapb 2024-09-04T06:59:19Z 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. Article in Journal/Newspaper Antarc* Antarctic North Atlantic Deep Water North Atlantic Northeast Atlantic Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB Antarctic Paleoceanography 15 5 515 527 |
institution |
Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
language |
English |
topic |
Water masses Stable isotopes Trace elements |
spellingShingle |
Water masses Stable isotopes Trace elements Willamowski, Claudia Zahn, Rainer Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting |
topic_facet |
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. |
format |
Article in Journal/Newspaper |
author |
Willamowski, Claudia Zahn, Rainer |
author_facet |
Willamowski, Claudia Zahn, Rainer |
author_sort |
Willamowski, Claudia |
title |
Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting |
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 |
publishDate |
2000 |
url |
https://ddd.uab.cat/record/25441 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic North Atlantic Deep Water North Atlantic Northeast Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic Deep Water North Atlantic Northeast Atlantic |
op_relation |
Paleoceanography Vol. 15, Issue 5 (2000), p. 515-527 https://ddd.uab.cat/record/25441 urn:10.1029/1999PA000467 urn:oai:ddd.uab.cat:25441 urn:recercauab:ARE-28260 urn:articleid:19449186v15n5p515 urn:scopus_id:0034451256 urn:wos_id:000089581200005 urn:oai:egreta.uab.cat:publications/cca8ca7f-caed-4c5c-b11d-70db11bf0896 |
op_rights |
open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ |
container_title |
Paleoceanography |
container_volume |
15 |
container_issue |
5 |
container_start_page |
515 |
op_container_end_page |
527 |
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1811638209217560576 |