A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8
Here, we establish a spatiotemporal evolution of the sea-surface temperatures in the North Atlantic over Dansgaard–Oeschger (DO) events 5–8 (approximately 30–40 kyr) using the proxy surrogate reconstruction method. Proxy data suggest a large variability in North Atlantic sea-surface temperatures dur...
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Copernicus Publications
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00005437 2023-05-15T16:00:04+02:00 A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8 Jensen, Mari F. Nummelin, Aleksi Nielsen, Søren B. Sadatzki, Henrik Sessford, Evangeline Risebrobakken, Bjørg Andersson, Carin Voelker, Antje Roberts, William H. G. Pedro, Joel Born, Andreas 2018-06 electronic https://doi.org/10.5194/cp-14-901-2018 https://noa.gwlb.de/receive/cop_mods_00005437 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005394/cp-14-901-2018.pdf https://cp.copernicus.org/articles/14/901/2018/cp-14-901-2018.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-14-901-2018 https://noa.gwlb.de/receive/cop_mods_00005437 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005394/cp-14-901-2018.pdf https://cp.copernicus.org/articles/14/901/2018/cp-14-901-2018.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-14-901-2018 2022-02-08T22:59:33Z Here, we establish a spatiotemporal evolution of the sea-surface temperatures in the North Atlantic over Dansgaard–Oeschger (DO) events 5–8 (approximately 30–40 kyr) using the proxy surrogate reconstruction method. Proxy data suggest a large variability in North Atlantic sea-surface temperatures during the DO events of the last glacial period. However, proxy data availability is limited and cannot provide a full spatial picture of the oceanic changes. Therefore, we combine fully coupled, general circulation model simulations with planktic foraminifera based sea-surface temperature reconstructions to obtain a broader spatial picture of the ocean state during DO events 5–8. The resulting spatial sea-surface temperature patterns agree over a number of different general circulation models and simulations. We find that sea-surface temperature variability over the DO events is characterized by colder conditions in the subpolar North Atlantic during stadials than during interstadials, and the variability is linked to changes in the Atlantic Meridional Overturning circulation and in the sea-ice cover. Forced simulations are needed to capture the strength of the temperature variability and to reconstruct the variability in other climatic records not directly linked to the sea-surface temperature reconstructions. This is the first time the proxy surrogate reconstruction method has been applied to oceanic variability during MIS3. Our results remain robust, even when age uncertainties of proxy data, the number of available temperature reconstructions, and different climate models are considered. However, we also highlight shortcomings of the methodology that should be addressed in future implementations. Article in Journal/Newspaper Dansgaard-Oeschger events North Atlantic Sea ice Niedersächsisches Online-Archiv NOA Climate of the Past 14 6 901 922 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Jensen, Mari F. Nummelin, Aleksi Nielsen, Søren B. Sadatzki, Henrik Sessford, Evangeline Risebrobakken, Bjørg Andersson, Carin Voelker, Antje Roberts, William H. G. Pedro, Joel Born, Andreas A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8 |
topic_facet |
article Verlagsveröffentlichung |
description |
Here, we establish a spatiotemporal evolution of the sea-surface temperatures in the North Atlantic over Dansgaard–Oeschger (DO) events 5–8 (approximately 30–40 kyr) using the proxy surrogate reconstruction method. Proxy data suggest a large variability in North Atlantic sea-surface temperatures during the DO events of the last glacial period. However, proxy data availability is limited and cannot provide a full spatial picture of the oceanic changes. Therefore, we combine fully coupled, general circulation model simulations with planktic foraminifera based sea-surface temperature reconstructions to obtain a broader spatial picture of the ocean state during DO events 5–8. The resulting spatial sea-surface temperature patterns agree over a number of different general circulation models and simulations. We find that sea-surface temperature variability over the DO events is characterized by colder conditions in the subpolar North Atlantic during stadials than during interstadials, and the variability is linked to changes in the Atlantic Meridional Overturning circulation and in the sea-ice cover. Forced simulations are needed to capture the strength of the temperature variability and to reconstruct the variability in other climatic records not directly linked to the sea-surface temperature reconstructions. This is the first time the proxy surrogate reconstruction method has been applied to oceanic variability during MIS3. Our results remain robust, even when age uncertainties of proxy data, the number of available temperature reconstructions, and different climate models are considered. However, we also highlight shortcomings of the methodology that should be addressed in future implementations. |
format |
Article in Journal/Newspaper |
author |
Jensen, Mari F. Nummelin, Aleksi Nielsen, Søren B. Sadatzki, Henrik Sessford, Evangeline Risebrobakken, Bjørg Andersson, Carin Voelker, Antje Roberts, William H. G. Pedro, Joel Born, Andreas |
author_facet |
Jensen, Mari F. Nummelin, Aleksi Nielsen, Søren B. Sadatzki, Henrik Sessford, Evangeline Risebrobakken, Bjørg Andersson, Carin Voelker, Antje Roberts, William H. G. Pedro, Joel Born, Andreas |
author_sort |
Jensen, Mari F. |
title |
A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8 |
title_short |
A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8 |
title_full |
A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8 |
title_fullStr |
A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8 |
title_full_unstemmed |
A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8 |
title_sort |
spatiotemporal reconstruction of sea-surface temperatures in the north atlantic during dansgaard–oeschger events 5–8 |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-14-901-2018 https://noa.gwlb.de/receive/cop_mods_00005437 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005394/cp-14-901-2018.pdf https://cp.copernicus.org/articles/14/901/2018/cp-14-901-2018.pdf |
genre |
Dansgaard-Oeschger events North Atlantic Sea ice |
genre_facet |
Dansgaard-Oeschger events North Atlantic Sea ice |
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-14-901-2018 https://noa.gwlb.de/receive/cop_mods_00005437 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005394/cp-14-901-2018.pdf https://cp.copernicus.org/articles/14/901/2018/cp-14-901-2018.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-14-901-2018 |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
6 |
container_start_page |
901 |
op_container_end_page |
922 |
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1766395940024877056 |