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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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00004463 2023-05-15T17:33:00+02:00 Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes Zhuravleva, Anastasia Bauch, Henning A. 2018-10 electronic https://doi.org/10.5194/cp-14-1361-2018 https://noa.gwlb.de/receive/cop_mods_00004463 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004420/cp-14-1361-2018.pdf https://cp.copernicus.org/articles/14/1361/2018/cp-14-1361-2018.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-14-1361-2018 https://noa.gwlb.de/receive/cop_mods_00004463 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004420/cp-14-1361-2018.pdf https://cp.copernicus.org/articles/14/1361/2018/cp-14-1361-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/cp-14-1361-2018 2022-02-08T23:00:06Z 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 Niedersächsisches Online-Archiv NOA Climate of the Past 14 10 1361 1375 |
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article Verlagsveröffentlichung Zhuravleva, Anastasia Bauch, Henning A. Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes |
topic_facet |
article Verlagsveröffentlichung |
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. |
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 |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-14-1361-2018 https://noa.gwlb.de/receive/cop_mods_00004463 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004420/cp-14-1361-2018.pdf https://cp.copernicus.org/articles/14/1361/2018/cp-14-1361-2018.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-14-1361-2018 https://noa.gwlb.de/receive/cop_mods_00004463 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004420/cp-14-1361-2018.pdf https://cp.copernicus.org/articles/14/1361/2018/cp-14-1361-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
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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