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) O-18 and Mg/Ca-derived SST. By focusing on the last 80,000years, th...
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Amer Geophysical Union
2014
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Online Access: | https://doi.org/10.1002/2014PA002698 https://archimer.ifremer.fr/doc/00289/40041/39390.pdf https://archimer.ifremer.fr/doc/00289/40041/39392.pdf https://archimer.ifremer.fr/doc/00289/40041/39393.pdf https://archimer.ifremer.fr/doc/00289/40041/39394.pdf https://archimer.ifremer.fr/doc/00289/40041/39396.pdf https://archimer.ifremer.fr/doc/00289/40041/39397.pdf https://archimer.ifremer.fr/doc/00289/40041/39398.pdf https://archimer.ifremer.fr/doc/00289/40041/39391.docx |
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fttriple:oai:gotriple.eu:10670/1.o6nvie 2023-05-15T16:29:22+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. 2014-12-18 https://doi.org/10.1002/2014PA002698 https://archimer.ifremer.fr/doc/00289/40041/39390.pdf https://archimer.ifremer.fr/doc/00289/40041/39392.pdf https://archimer.ifremer.fr/doc/00289/40041/39393.pdf https://archimer.ifremer.fr/doc/00289/40041/39394.pdf https://archimer.ifremer.fr/doc/00289/40041/39396.pdf https://archimer.ifremer.fr/doc/00289/40041/39397.pdf https://archimer.ifremer.fr/doc/00289/40041/39398.pdf https://archimer.ifremer.fr/doc/00289/40041/39391.docx en eng Amer Geophysical Union doi:10.1002/2014PA002698 10670/1.o6nvie https://archimer.ifremer.fr/doc/00289/40041/39390.pdf https://archimer.ifremer.fr/doc/00289/40041/39392.pdf https://archimer.ifremer.fr/doc/00289/40041/39393.pdf https://archimer.ifremer.fr/doc/00289/40041/39394.pdf https://archimer.ifremer.fr/doc/00289/40041/39396.pdf https://archimer.ifremer.fr/doc/00289/40041/39397.pdf https://archimer.ifremer.fr/doc/00289/40041/39398.pdf https://archimer.ifremer.fr/doc/00289/40041/39391.docx Archimer, archive institutionnelle de l'Ifremer Paleoceanography (0883-8305) (Amer Geophysical Union), 2014-12-18 , Vol. 29 , N. 12 , P. 1238-1248 envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2014 fttriple https://doi.org/10.1002/2014PA002698 2023-01-22T17:26:24Z 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) O-18 and Mg/Ca-derived SST. By focusing on the last 80,000years, 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. Text Greenland Greenland ice core ice core North Atlantic Unknown Greenland Paleoceanography 29 12 1238 1248 |
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envir geo Dyez, Kelsey A. Zahn, Rainer Hall, Ian R. Multicentennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
topic_facet |
envir geo |
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) O-18 and Mg/Ca-derived SST. By focusing on the last 80,000years, 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 |
Text |
author |
Dyez, Kelsey A. Zahn, Rainer Hall, Ian R. |
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 |
publisher |
Amer Geophysical Union |
publishDate |
2014 |
url |
https://doi.org/10.1002/2014PA002698 https://archimer.ifremer.fr/doc/00289/40041/39390.pdf https://archimer.ifremer.fr/doc/00289/40041/39392.pdf https://archimer.ifremer.fr/doc/00289/40041/39393.pdf https://archimer.ifremer.fr/doc/00289/40041/39394.pdf https://archimer.ifremer.fr/doc/00289/40041/39396.pdf https://archimer.ifremer.fr/doc/00289/40041/39397.pdf https://archimer.ifremer.fr/doc/00289/40041/39398.pdf https://archimer.ifremer.fr/doc/00289/40041/39391.docx |
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_source |
Archimer, archive institutionnelle de l'Ifremer Paleoceanography (0883-8305) (Amer Geophysical Union), 2014-12-18 , Vol. 29 , N. 12 , P. 1238-1248 |
op_relation |
doi:10.1002/2014PA002698 10670/1.o6nvie https://archimer.ifremer.fr/doc/00289/40041/39390.pdf https://archimer.ifremer.fr/doc/00289/40041/39392.pdf https://archimer.ifremer.fr/doc/00289/40041/39393.pdf https://archimer.ifremer.fr/doc/00289/40041/39394.pdf https://archimer.ifremer.fr/doc/00289/40041/39396.pdf https://archimer.ifremer.fr/doc/00289/40041/39397.pdf https://archimer.ifremer.fr/doc/00289/40041/39398.pdf https://archimer.ifremer.fr/doc/00289/40041/39391.docx |
op_doi |
https://doi.org/10.1002/2014PA002698 |
container_title |
Paleoceanography |
container_volume |
29 |
container_issue |
12 |
container_start_page |
1238 |
op_container_end_page |
1248 |
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1766019065004949504 |