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 30-40ĝ€kyr) using the proxy surrogate reconstruction method. Proxy data suggest a large variability in North Atlantic sea-surface temperatures du...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://hdl.handle.net/1983/78524c33-0d36-4117-9c8f-4d6ad4d82934 https://research-information.bris.ac.uk/en/publications/78524c33-0d36-4117-9c8f-4d6ad4d82934 https://doi.org/10.5194/cp-14-901-2018 https://research-information.bris.ac.uk/ws/files/162603968/cp_14_901_2018.pdf http://www.scopus.com/inward/record.url?scp=85049252303&partnerID=8YFLogxK |
id |
ftubristolcris:oai:research-information.bris.ac.uk:publications/78524c33-0d36-4117-9c8f-4d6ad4d82934 |
---|---|
record_format |
openpolar |
spelling |
ftubristolcris:oai:research-information.bris.ac.uk:publications/78524c33-0d36-4117-9c8f-4d6ad4d82934 2024-01-28T10:05:22+01:00 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, Bjorg Andersson, Carin Voelker, Antje Roberts, William H.G. Pedro, Joel Born, Andreas 2018-06 application/pdf https://hdl.handle.net/1983/78524c33-0d36-4117-9c8f-4d6ad4d82934 https://research-information.bris.ac.uk/en/publications/78524c33-0d36-4117-9c8f-4d6ad4d82934 https://doi.org/10.5194/cp-14-901-2018 https://research-information.bris.ac.uk/ws/files/162603968/cp_14_901_2018.pdf http://www.scopus.com/inward/record.url?scp=85049252303&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Jensen , M F , Nummelin , A , Nielsen , S B , Sadatzki , H , Sessford , E , Risebrobakken , B , Andersson , C , Voelker , A , Roberts , W H G , Pedro , J & Born , A 2018 , ' A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard-Oeschger events 5-8 ' , Climate of the Past , vol. 14 , no. 6 , pp. 901-922 . https://doi.org/10.5194/cp-14-901-2018 article 2018 ftubristolcris https://doi.org/10.5194/cp-14-901-2018 2024-01-04T23:56:46Z Here, we establish a spatiotemporal evolution of the sea-surface temperatures in the North Atlantic over Dansgaard-Oeschger (DO) events 5-8 (approximately 30-40ĝ€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 University of Bristol: Bristol Research Climate of the Past 14 6 901 922 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
description |
Here, we establish a spatiotemporal evolution of the sea-surface temperatures in the North Atlantic over Dansgaard-Oeschger (DO) events 5-8 (approximately 30-40ĝ€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, Bjorg Andersson, Carin Voelker, Antje Roberts, William H.G. Pedro, Joel Born, Andreas |
spellingShingle |
Jensen, Mari F. Nummelin, Aleksi Nielsen, Søren 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 |
author_facet |
Jensen, Mari F. Nummelin, Aleksi Nielsen, Søren 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 |
publishDate |
2018 |
url |
https://hdl.handle.net/1983/78524c33-0d36-4117-9c8f-4d6ad4d82934 https://research-information.bris.ac.uk/en/publications/78524c33-0d36-4117-9c8f-4d6ad4d82934 https://doi.org/10.5194/cp-14-901-2018 https://research-information.bris.ac.uk/ws/files/162603968/cp_14_901_2018.pdf http://www.scopus.com/inward/record.url?scp=85049252303&partnerID=8YFLogxK |
genre |
Dansgaard-Oeschger events North Atlantic Sea ice |
genre_facet |
Dansgaard-Oeschger events North Atlantic Sea ice |
op_source |
Jensen , M F , Nummelin , A , Nielsen , S B , Sadatzki , H , Sessford , E , Risebrobakken , B , Andersson , C , Voelker , A , Roberts , W H G , Pedro , J & Born , A 2018 , ' A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard-Oeschger events 5-8 ' , Climate of the Past , vol. 14 , no. 6 , pp. 901-922 . https://doi.org/10.5194/cp-14-901-2018 |
op_rights |
info:eu-repo/semantics/openAccess |
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 |
_version_ |
1789331621781962752 |