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 3040 kyr) using the proxy surrogate reconstruction method. Proxy data suggest a large variability in North Atlantic sea-surface temperatures duri...
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Language: | English |
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Copernicus Publications- European Geosciences Union (EGU)
2009
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Online Access: | http://hdl.handle.net/10400.1/11755 https://doi.org/10.1016/j.aquaculture.2009.08.024 |
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/11755 2023-05-15T16:00:05+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, Soren B. Sadatzki, Henrik Sessford, Evangeline Risebrobakken, Bjorg Andersson, Carin Voelker, Antje Roberts, William H. G. Pedro, Joel Born, Andreas 2009-11 http://hdl.handle.net/10400.1/11755 https://doi.org/10.1016/j.aquaculture.2009.08.024 eng eng Copernicus Publications- European Geosciences Union (EGU) FP7/2007–2013/ERC info:eu-repo/grantAgreement/EC/FP7/610055/EU info:eu-repo/grantAgreement/FCT/5876/147257/PT info:eu-repo/grantAgreement/FCT/POCI/57752/PT 1814-9324 1814-9332 http://hdl.handle.net/10400.1/11755 doi:10.1016/j.aquaculture.2009.08.024 openAccess Abrupt climate change Marine usotope stage-3 Last glacial period Greenland ice core Planktonic foraminifera Coupled climate Heinrich events Pmip4 contribution Ocean circulation Latitude climate article 2009 ftunivalgarve https://doi.org/10.1016/j.aquaculture.2009.08.024 2022-05-30T08:48:23Z Here, we establish a spatiotemporal evolution of the sea-surface temperatures in the North Atlantic over Dansgaard-Oeschger (DO) events 5-8 (approximately 3040 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 seasurface 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 inter-stadials, 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 seasurface 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. European Research Council under the European Community's Seventh Framework Programme/ERC [610055]; Centre for Climate Dynamics at the Bjerknes Centre Article in Journal/Newspaper Dansgaard-Oeschger events Greenland Greenland ice core ice core North Atlantic Planktonic foraminifera Sea ice Universidade do Algarve: Sapienta Greenland Aquaculture 296 3-4 284 291 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Abrupt climate change Marine usotope stage-3 Last glacial period Greenland ice core Planktonic foraminifera Coupled climate Heinrich events Pmip4 contribution Ocean circulation Latitude climate |
spellingShingle |
Abrupt climate change Marine usotope stage-3 Last glacial period Greenland ice core Planktonic foraminifera Coupled climate Heinrich events Pmip4 contribution Ocean circulation Latitude climate Jensen, Mari F. Nummelin, Aleksi Nielsen, Soren B. Sadatzki, Henrik Sessford, Evangeline Risebrobakken, Bjorg 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 |
Abrupt climate change Marine usotope stage-3 Last glacial period Greenland ice core Planktonic foraminifera Coupled climate Heinrich events Pmip4 contribution Ocean circulation Latitude climate |
description |
Here, we establish a spatiotemporal evolution of the sea-surface temperatures in the North Atlantic over Dansgaard-Oeschger (DO) events 5-8 (approximately 3040 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 seasurface 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 inter-stadials, 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 seasurface 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. European Research Council under the European Community's Seventh Framework Programme/ERC [610055]; Centre for Climate Dynamics at the Bjerknes Centre |
format |
Article in Journal/Newspaper |
author |
Jensen, Mari F. Nummelin, Aleksi Nielsen, Soren B. Sadatzki, Henrik Sessford, Evangeline Risebrobakken, Bjorg Andersson, Carin Voelker, Antje Roberts, William H. G. Pedro, Joel Born, Andreas |
author_facet |
Jensen, Mari F. Nummelin, Aleksi Nielsen, Soren B. Sadatzki, Henrik Sessford, Evangeline Risebrobakken, Bjorg 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- European Geosciences Union (EGU) |
publishDate |
2009 |
url |
http://hdl.handle.net/10400.1/11755 https://doi.org/10.1016/j.aquaculture.2009.08.024 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Dansgaard-Oeschger events Greenland Greenland ice core ice core North Atlantic Planktonic foraminifera Sea ice |
genre_facet |
Dansgaard-Oeschger events Greenland Greenland ice core ice core North Atlantic Planktonic foraminifera Sea ice |
op_relation |
FP7/2007–2013/ERC info:eu-repo/grantAgreement/EC/FP7/610055/EU info:eu-repo/grantAgreement/FCT/5876/147257/PT info:eu-repo/grantAgreement/FCT/POCI/57752/PT 1814-9324 1814-9332 http://hdl.handle.net/10400.1/11755 doi:10.1016/j.aquaculture.2009.08.024 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1016/j.aquaculture.2009.08.024 |
container_title |
Aquaculture |
container_volume |
296 |
container_issue |
3-4 |
container_start_page |
284 |
op_container_end_page |
291 |
_version_ |
1766395955686408192 |