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...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
European Geosciences Union
2018
|
Subjects: | |
Online Access: | https://nrl.northumbria.ac.uk/id/eprint/36200/ https://doi.org/10.5194/cp-14-901-2018 https://nrl.northumbria.ac.uk/id/eprint/36200/1/cp-14-901-2018.pdf |
id |
ftunivnorthumb:oai:nrl.northumbria.ac.uk:36200 |
---|---|
record_format |
openpolar |
spelling |
ftunivnorthumb:oai:nrl.northumbria.ac.uk:36200 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 Sadatzki, Henrik Sessford, Evangeline Risebrobakken, Bjørg Andersson, Carin Voelker, Antje Roberts, William Pedro, Joel Born, Andreas 2018-06-26 text https://nrl.northumbria.ac.uk/id/eprint/36200/ https://doi.org/10.5194/cp-14-901-2018 https://nrl.northumbria.ac.uk/id/eprint/36200/1/cp-14-901-2018.pdf en eng European Geosciences Union https://nrl.northumbria.ac.uk/id/eprint/36200/1/cp-14-901-2018.pdf Jensen, Mari F., Nummelin, Aleksi, Nielsen, Søren, Sadatzki, Henrik, Sessford, Evangeline, Risebrobakken, Bjørg, Andersson, Carin, Voelker, Antje, Roberts, William, Pedro, Joel and Born, Andreas (2018) A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8. Climate of the Past, 14 (6). pp. 901-922. ISSN 1814-9332 cc_by_4_0 CC-BY F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2018 ftunivnorthumb https://doi.org/10.5194/cp-14-901-2018 2022-09-25T06:08:17Z 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 Northumbria University, Newcastle: Northumbria Research Link (NRL) Climate of the Past 14 6 901 922 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F800 Physical and Terrestrial Geographical and Environmental Sciences Jensen, Mari F. Nummelin, Aleksi Nielsen, Søren Sadatzki, Henrik Sessford, Evangeline Risebrobakken, Bjørg Andersson, Carin Voelker, Antje Roberts, William Pedro, Joel Born, Andreas A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8 |
topic_facet |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
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 Sadatzki, Henrik Sessford, Evangeline Risebrobakken, Bjørg Andersson, Carin Voelker, Antje Roberts, William Pedro, Joel Born, Andreas |
author_facet |
Jensen, Mari F. Nummelin, Aleksi Nielsen, Søren Sadatzki, Henrik Sessford, Evangeline Risebrobakken, Bjørg Andersson, Carin Voelker, Antje Roberts, William 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 |
European Geosciences Union |
publishDate |
2018 |
url |
https://nrl.northumbria.ac.uk/id/eprint/36200/ https://doi.org/10.5194/cp-14-901-2018 https://nrl.northumbria.ac.uk/id/eprint/36200/1/cp-14-901-2018.pdf |
genre |
Dansgaard-Oeschger events North Atlantic Sea ice |
genre_facet |
Dansgaard-Oeschger events North Atlantic Sea ice |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/36200/1/cp-14-901-2018.pdf Jensen, Mari F., Nummelin, Aleksi, Nielsen, Søren, Sadatzki, Henrik, Sessford, Evangeline, Risebrobakken, Bjørg, Andersson, Carin, Voelker, Antje, Roberts, William, Pedro, Joel and Born, Andreas (2018) A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8. Climate of the Past, 14 (6). pp. 901-922. ISSN 1814-9332 |
op_rights |
cc_by_4_0 |
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 |
_version_ |
1766395946641391616 |