Sea-surface temperature evolution across Aptian Oceanic Anoxic Event 1a
Atmospheric CO 2 possibly doubled during Oceanic Anoxic Event (OAE) 1a, likely in response to submarine volcanic outgassing. Despite being important for our understanding of the consequences of carbon cycle perturbations, the response of the climate system to this increase in greenhouse forcing is p...
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Online Access: | https://hdl.handle.net/1983/c8e7dacc-39e3-4690-8965-0144adf4d728 https://research-information.bris.ac.uk/en/publications/c8e7dacc-39e3-4690-8965-0144adf4d728 https://doi.org/10.1130/G38575.1 https://research-information.bris.ac.uk/ws/files/85405717/Naafs_Pancost_OAE1a.pdf |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/c8e7dacc-39e3-4690-8965-0144adf4d728 2024-04-28T08:30:44+00:00 Sea-surface temperature evolution across Aptian Oceanic Anoxic Event 1a Naafs, David Pancost, Rich 2016-11 application/pdf https://hdl.handle.net/1983/c8e7dacc-39e3-4690-8965-0144adf4d728 https://research-information.bris.ac.uk/en/publications/c8e7dacc-39e3-4690-8965-0144adf4d728 https://doi.org/10.1130/G38575.1 https://research-information.bris.ac.uk/ws/files/85405717/Naafs_Pancost_OAE1a.pdf eng eng https://research-information.bris.ac.uk/en/publications/c8e7dacc-39e3-4690-8965-0144adf4d728 info:eu-repo/semantics/openAccess Naafs , D & Pancost , R 2016 , ' Sea-surface temperature evolution across Aptian Oceanic Anoxic Event 1a ' , Geology , vol. 44 , no. 11 , pp. 959-962 . https://doi.org/10.1130/G38575.1 article 2016 ftubristolcris https://doi.org/10.1130/G38575.1 2024-04-03T15:33:35Z Atmospheric CO 2 possibly doubled during Oceanic Anoxic Event (OAE) 1a, likely in response to submarine volcanic outgassing. Despite being important for our understanding of the consequences of carbon cycle perturbations, the response of the climate system to this increase in greenhouse forcing is poorly constrained. Here we provide a new sea surface temperature (SST) record from the mid-latitude proto-North Atlantic based on the organic geochemical TEX 86 -paleothermometer. Using different calibrations, including the newly developed BAYSPAR deep time analogue approach, we demonstrate that SSTs increased by ~ 2-4 °C during OAE 1a and decreased by ~ 4-6 °C at its end, both simultaneous with changes in δ 13 C org , which we argue reflects changes in p CO 2 . We demonstrate that a clear latitudinal SST-gradient prevailed during OAE 1a, contrary to the generally accepted view that a nearly flat SST-gradient existed during OAE 1a and the Early Cretaceous. These results are more consistent with climate model simulations of the Cretaceous that have failed to produce flat SST-gradients. Article in Journal/Newspaper North Atlantic University of Bristol: Bristol Research Geology 44 11 959 962 |
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Open Polar |
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University of Bristol: Bristol Research |
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ftubristolcris |
language |
English |
description |
Atmospheric CO 2 possibly doubled during Oceanic Anoxic Event (OAE) 1a, likely in response to submarine volcanic outgassing. Despite being important for our understanding of the consequences of carbon cycle perturbations, the response of the climate system to this increase in greenhouse forcing is poorly constrained. Here we provide a new sea surface temperature (SST) record from the mid-latitude proto-North Atlantic based on the organic geochemical TEX 86 -paleothermometer. Using different calibrations, including the newly developed BAYSPAR deep time analogue approach, we demonstrate that SSTs increased by ~ 2-4 °C during OAE 1a and decreased by ~ 4-6 °C at its end, both simultaneous with changes in δ 13 C org , which we argue reflects changes in p CO 2 . We demonstrate that a clear latitudinal SST-gradient prevailed during OAE 1a, contrary to the generally accepted view that a nearly flat SST-gradient existed during OAE 1a and the Early Cretaceous. These results are more consistent with climate model simulations of the Cretaceous that have failed to produce flat SST-gradients. |
format |
Article in Journal/Newspaper |
author |
Naafs, David Pancost, Rich |
spellingShingle |
Naafs, David Pancost, Rich Sea-surface temperature evolution across Aptian Oceanic Anoxic Event 1a |
author_facet |
Naafs, David Pancost, Rich |
author_sort |
Naafs, David |
title |
Sea-surface temperature evolution across Aptian Oceanic Anoxic Event 1a |
title_short |
Sea-surface temperature evolution across Aptian Oceanic Anoxic Event 1a |
title_full |
Sea-surface temperature evolution across Aptian Oceanic Anoxic Event 1a |
title_fullStr |
Sea-surface temperature evolution across Aptian Oceanic Anoxic Event 1a |
title_full_unstemmed |
Sea-surface temperature evolution across Aptian Oceanic Anoxic Event 1a |
title_sort |
sea-surface temperature evolution across aptian oceanic anoxic event 1a |
publishDate |
2016 |
url |
https://hdl.handle.net/1983/c8e7dacc-39e3-4690-8965-0144adf4d728 https://research-information.bris.ac.uk/en/publications/c8e7dacc-39e3-4690-8965-0144adf4d728 https://doi.org/10.1130/G38575.1 https://research-information.bris.ac.uk/ws/files/85405717/Naafs_Pancost_OAE1a.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Naafs , D & Pancost , R 2016 , ' Sea-surface temperature evolution across Aptian Oceanic Anoxic Event 1a ' , Geology , vol. 44 , no. 11 , pp. 959-962 . https://doi.org/10.1130/G38575.1 |
op_relation |
https://research-information.bris.ac.uk/en/publications/c8e7dacc-39e3-4690-8965-0144adf4d728 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1130/G38575.1 |
container_title |
Geology |
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44 |
container_issue |
11 |
container_start_page |
959 |
op_container_end_page |
962 |
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1797588499707199488 |