Multicentennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years
New high-resolution sea surface temperature (SST) and sea surface salinity (SSS) estimates are presented from the Agulhas Bank slope in the Atlantic sector of the Agulhas Corridor using planktic foraminiferal (Globigerinoides ruber) δ18O and Mg/Ca-derived SST. By focusing on the last 80,000 years, t...
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Language: | English |
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ftuabarcelonapb:oai:ddd.uab.cat:160565 2023-05-15T16:29:23+02:00 Multicentennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years Dyez, Kelsey A. Zahn, Rainer Hall, Ian R. 2014 application/pdf https://ddd.uab.cat/record/160565 eng eng European Commission 238512 Paleoceanography Vol. 29, Issue 12 (Desember 2014), p. 1238-1248 https://ddd.uab.cat/record/160565 urn:10.1002/2014PA002698 urn:oai:ddd.uab.cat:160565 urn:articleid:19449186v29n12p1238 urn:scopus_id:85027919040 urn:wos_id:000348536600008 urn:altmetric_id:2936075 urn:oai:egreta.uab.cat:publications/9f29b293-b22d-47c9-88ff-504c81754699 open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ Article 2014 ftuabarcelonapb 2023-02-06T21:08:31Z New high-resolution sea surface temperature (SST) and sea surface salinity (SSS) estimates are presented from the Agulhas Bank slope in the Atlantic sector of the Agulhas Corridor using planktic foraminiferal (Globigerinoides ruber) δ18O and Mg/Ca-derived SST. By focusing on the last 80,000 years, this is the first fine-scale Agulhas leakage record that overlaps in time with much of the Greenland ice core record of abrupt climate changes in the North Atlantic region. The multicentennial profiles indicate instances of warm SST and/or increased SSS coincident with Northern Hemisphere cool periods, followed by Northern Hemisphere warming. These periods of enhanced SST and SSS in the Agulhas Corridor occur at the last glacial termination (T1) and during North Atlantic cold episodes associated with Heinrich (H) meltwater events. To a first-order approximation, the timing of maximal salinity events in relation to periods of North Atlantic freshwater perturbation is consistent with the concept suggested by climate models that enhanced Agulhas leakage provides for buoyancy compensation and can potentially trigger increased convective activity in the North Atlantic, thereby restoring Atlantic overturning circulation after relatively weak states. Article in Journal/Newspaper Greenland Greenland ice core ice core North Atlantic Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB Greenland Paleoceanography 29 12 1238 1248 |
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Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
language |
English |
description |
New high-resolution sea surface temperature (SST) and sea surface salinity (SSS) estimates are presented from the Agulhas Bank slope in the Atlantic sector of the Agulhas Corridor using planktic foraminiferal (Globigerinoides ruber) δ18O and Mg/Ca-derived SST. By focusing on the last 80,000 years, this is the first fine-scale Agulhas leakage record that overlaps in time with much of the Greenland ice core record of abrupt climate changes in the North Atlantic region. The multicentennial profiles indicate instances of warm SST and/or increased SSS coincident with Northern Hemisphere cool periods, followed by Northern Hemisphere warming. These periods of enhanced SST and SSS in the Agulhas Corridor occur at the last glacial termination (T1) and during North Atlantic cold episodes associated with Heinrich (H) meltwater events. To a first-order approximation, the timing of maximal salinity events in relation to periods of North Atlantic freshwater perturbation is consistent with the concept suggested by climate models that enhanced Agulhas leakage provides for buoyancy compensation and can potentially trigger increased convective activity in the North Atlantic, thereby restoring Atlantic overturning circulation after relatively weak states. |
format |
Article in Journal/Newspaper |
author |
Dyez, Kelsey A. Zahn, Rainer Hall, Ian R. |
spellingShingle |
Dyez, Kelsey A. Zahn, Rainer Hall, Ian R. Multicentennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
author_facet |
Dyez, Kelsey A. Zahn, Rainer Hall, Ian R. |
author_sort |
Dyez, Kelsey A. |
title |
Multicentennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
title_short |
Multicentennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
title_full |
Multicentennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
title_fullStr |
Multicentennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
title_full_unstemmed |
Multicentennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
title_sort |
multicentennial agulhas leakage variability and links to north atlantic climate during the past 80,000 years |
publishDate |
2014 |
url |
https://ddd.uab.cat/record/160565 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core ice core North Atlantic |
genre_facet |
Greenland Greenland ice core ice core North Atlantic |
op_relation |
European Commission 238512 Paleoceanography Vol. 29, Issue 12 (Desember 2014), p. 1238-1248 https://ddd.uab.cat/record/160565 urn:10.1002/2014PA002698 urn:oai:ddd.uab.cat:160565 urn:articleid:19449186v29n12p1238 urn:scopus_id:85027919040 urn:wos_id:000348536600008 urn:altmetric_id:2936075 urn:oai:egreta.uab.cat:publications/9f29b293-b22d-47c9-88ff-504c81754699 |
op_rights |
open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ |
container_title |
Paleoceanography |
container_volume |
29 |
container_issue |
12 |
container_start_page |
1238 |
op_container_end_page |
1248 |
_version_ |
1766019075707764736 |