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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Copernicus Publications
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fttriple:oai:gotriple.eu:oai:doaj.org/article:a4d5229ad0ef4ae1915dbcfbc384c153 2023-05-15T17:33:14+02:00 Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes A. Zhuravleva H. A. Bauch 2018-10-01 https://doi.org/10.5194/cp-14-1361-2018 https://www.clim-past.net/14/1361/2018/cp-14-1361-2018.pdf https://doaj.org/article/a4d5229ad0ef4ae1915dbcfbc384c153 en eng Copernicus Publications doi:10.5194/cp-14-1361-2018 1814-9324 1814-9332 https://www.clim-past.net/14/1361/2018/cp-14-1361-2018.pdf https://doaj.org/article/a4d5229ad0ef4ae1915dbcfbc384c153 undefined Climate of the Past, Vol 14, Pp 1361-1375 (2018) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/cp-14-1361-2018 2023-01-22T17:53:16Z 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 Unknown Climate of the Past 14 10 1361 1375 |
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geo envir A. Zhuravleva H. A. Bauch Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes |
topic_facet |
geo envir |
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 |
A. Zhuravleva H. A. Bauch |
author_facet |
A. Zhuravleva H. A. Bauch |
author_sort |
A. Zhuravleva |
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 |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-14-1361-2018 https://www.clim-past.net/14/1361/2018/cp-14-1361-2018.pdf https://doaj.org/article/a4d5229ad0ef4ae1915dbcfbc384c153 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Climate of the Past, Vol 14, Pp 1361-1375 (2018) |
op_relation |
doi:10.5194/cp-14-1361-2018 1814-9324 1814-9332 https://www.clim-past.net/14/1361/2018/cp-14-1361-2018.pdf https://doaj.org/article/a4d5229ad0ef4ae1915dbcfbc384c153 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-14-1361-2018 |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
10 |
container_start_page |
1361 |
op_container_end_page |
1375 |
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1766131660823199744 |