Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes
Paleorecords and modeling studies suggest that instabilities in the Atlantic Meridional Overturning Circulation (AMOC) strongly affect the low-latitude climate, namely via feedbacks on the Atlantic Intertropical Convergence Zone (ITCZ). Despite the pronounced millennial-scale overturning and climati...
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Language: | English |
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Copernicus Publications (EGU)
2018
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Online Access: | https://oceanrep.geomar.de/id/eprint/44491/ https://oceanrep.geomar.de/id/eprint/44491/1/cp-14-1361-2018.pdf https://doi.org/10.5194/cp-14-1361-2018 |
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ftoceanrep:oai:oceanrep.geomar.de:44491 2023-05-15T17:33:16+02:00 Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes Zhuravleva, Anastasia Bauch, Henning A. 2018-10-01 text https://oceanrep.geomar.de/id/eprint/44491/ https://oceanrep.geomar.de/id/eprint/44491/1/cp-14-1361-2018.pdf https://doi.org/10.5194/cp-14-1361-2018 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/44491/1/cp-14-1361-2018.pdf Zhuravleva, A. and Bauch, H. A. (2018) Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes. Open Access Climate of the Past, 14 (10). pp. 1361-1375. DOI 10.5194/cp-14-1361-2018 <https://doi.org/10.5194/cp-14-1361-2018>. doi:10.5194/cp-14-1361-2018 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2018 ftoceanrep https://doi.org/10.5194/cp-14-1361-2018 2023-04-07T15:41:35Z Paleorecords and modeling studies suggest that instabilities in the Atlantic Meridional Overturning Circulation (AMOC) strongly affect the low-latitude climate, namely via feedbacks on the Atlantic Intertropical Convergence Zone (ITCZ). Despite the pronounced millennial-scale overturning and climatic variability documented in the subpolar North Atlantic during the last interglacial period (MIS 5e), studies on cross-latitudinal teleconnections remain very limited. This precludes a full understanding of the mechanisms controlling subtropical climate evolution across the last warm cycle. Here, we present new planktic foraminiferal assemblage data combined with δ18O values in surface and thermocline-dwelling foraminifera from the Bahamas, a region ideally suited to studying past changes in the subtropical ocean and atmosphere. Our data reveal that the peak sea surface warmth during early MIS 5e was intersected by an abrupt millennial-scale cooling/salinification event, which was possibly associated with a sudden southward displacement of the mean annual ITCZ position. This atmospheric shift is, in turn, ascribed to the transitional climatic regime of early MIS 5e, which was characterized by persistent ocean freshening in the high latitudes and an unstable AMOC mode. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Climate of the Past 14 10 1361 1375 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Paleorecords and modeling studies suggest that instabilities in the Atlantic Meridional Overturning Circulation (AMOC) strongly affect the low-latitude climate, namely via feedbacks on the Atlantic Intertropical Convergence Zone (ITCZ). Despite the pronounced millennial-scale overturning and climatic variability documented in the subpolar North Atlantic during the last interglacial period (MIS 5e), studies on cross-latitudinal teleconnections remain very limited. This precludes a full understanding of the mechanisms controlling subtropical climate evolution across the last warm cycle. Here, we present new planktic foraminiferal assemblage data combined with δ18O values in surface and thermocline-dwelling foraminifera from the Bahamas, a region ideally suited to studying past changes in the subtropical ocean and atmosphere. Our data reveal that the peak sea surface warmth during early MIS 5e was intersected by an abrupt millennial-scale cooling/salinification event, which was possibly associated with a sudden southward displacement of the mean annual ITCZ position. This atmospheric shift is, in turn, ascribed to the transitional climatic regime of early MIS 5e, which was characterized by persistent ocean freshening in the high latitudes and an unstable AMOC mode. |
format |
Article in Journal/Newspaper |
author |
Zhuravleva, Anastasia Bauch, Henning A. |
spellingShingle |
Zhuravleva, Anastasia Bauch, Henning A. Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes |
author_facet |
Zhuravleva, Anastasia Bauch, Henning A. |
author_sort |
Zhuravleva, Anastasia |
title |
Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes |
title_short |
Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes |
title_full |
Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes |
title_fullStr |
Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes |
title_full_unstemmed |
Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes |
title_sort |
last interglacial ocean changes in the bahamas: climate teleconnections between low and high latitudes |
publisher |
Copernicus Publications (EGU) |
publishDate |
2018 |
url |
https://oceanrep.geomar.de/id/eprint/44491/ https://oceanrep.geomar.de/id/eprint/44491/1/cp-14-1361-2018.pdf https://doi.org/10.5194/cp-14-1361-2018 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/44491/1/cp-14-1361-2018.pdf Zhuravleva, A. and Bauch, H. A. (2018) Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes. Open Access Climate of the Past, 14 (10). pp. 1361-1375. DOI 10.5194/cp-14-1361-2018 <https://doi.org/10.5194/cp-14-1361-2018>. doi:10.5194/cp-14-1361-2018 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-14-1361-2018 |
container_title |
Climate of the Past |
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14 |
container_issue |
10 |
container_start_page |
1361 |
op_container_end_page |
1375 |
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1766131712476053504 |