Observed mechanisms activating the recent subpolar North Atlantic Warming since 2016
The overturning circulation of the subpolar North Atlantic (SPNA) plays a fundamental role in Earth’s climate variability and change. Here, we show from observations that the recent warming period since about 2016 in the eastern SPNA involves increased western boundary density at the intergyre bound...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Online Access: | https://doi.org/10.1098/rsta.2022.0183 |
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ftzenodo:oai:zenodo.org:10676500 2024-09-09T19:54:16+00:00 Observed mechanisms activating the recent subpolar North Atlantic Warming since 2016 Chafik, Léon Holliday, N. Penny Bacon, Sheldon Baker, Jonathan A. Desbruyères, Damien Frajka-Williams, Eleanor Jackson, Laura C. 2023-10-23 https://doi.org/10.1098/rsta.2022.0183 eng eng The Royal Society https://zenodo.org/communities/epoc https://doi.org/10.1098/rsta.2022.0183 oai:zenodo.org:10676500 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Philosophical Transactions of the Royal Society, 381(2262), (2023-10-23) Atlantic Meridional Overturning Circulation AMOC EPOC info:eu-repo/semantics/article 2023 ftzenodo https://doi.org/10.1098/rsta.2022.0183 2024-07-27T06:32:47Z The overturning circulation of the subpolar North Atlantic (SPNA) plays a fundamental role in Earth’s climate variability and change. Here, we show from observations that the recent warming period since about 2016 in the eastern SPNA involves increased western boundary density at the intergyre boundary, likely due to enhanced buoyancy forcing as a response to the strong increase in the North Atlantic Oscillation since the early 2010s. As these deep positive density anomalies spread southward along the western boundary, they enhance the North Atlantic Current and associated meridional heat transport at the intergyre region, leading to increased influx of subtropical heat into the eastern SPNA. Based on the timing of this chain of events, we conclude that this recent warming phase since about 2016 is primarily associated with this observed mechanism of changes in deep western boundary density, an essential element in these interactions. This article is part of a discussion meeting issue ‘Atlantic overturning: new observations and challenges’. Article in Journal/Newspaper north atlantic current North Atlantic North Atlantic oscillation Zenodo Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 381 2262 |
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English |
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Atlantic Meridional Overturning Circulation AMOC EPOC |
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Atlantic Meridional Overturning Circulation AMOC EPOC Chafik, Léon Holliday, N. Penny Bacon, Sheldon Baker, Jonathan A. Desbruyères, Damien Frajka-Williams, Eleanor Jackson, Laura C. Observed mechanisms activating the recent subpolar North Atlantic Warming since 2016 |
topic_facet |
Atlantic Meridional Overturning Circulation AMOC EPOC |
description |
The overturning circulation of the subpolar North Atlantic (SPNA) plays a fundamental role in Earth’s climate variability and change. Here, we show from observations that the recent warming period since about 2016 in the eastern SPNA involves increased western boundary density at the intergyre boundary, likely due to enhanced buoyancy forcing as a response to the strong increase in the North Atlantic Oscillation since the early 2010s. As these deep positive density anomalies spread southward along the western boundary, they enhance the North Atlantic Current and associated meridional heat transport at the intergyre region, leading to increased influx of subtropical heat into the eastern SPNA. Based on the timing of this chain of events, we conclude that this recent warming phase since about 2016 is primarily associated with this observed mechanism of changes in deep western boundary density, an essential element in these interactions. This article is part of a discussion meeting issue ‘Atlantic overturning: new observations and challenges’. |
format |
Article in Journal/Newspaper |
author |
Chafik, Léon Holliday, N. Penny Bacon, Sheldon Baker, Jonathan A. Desbruyères, Damien Frajka-Williams, Eleanor Jackson, Laura C. |
author_facet |
Chafik, Léon Holliday, N. Penny Bacon, Sheldon Baker, Jonathan A. Desbruyères, Damien Frajka-Williams, Eleanor Jackson, Laura C. |
author_sort |
Chafik, Léon |
title |
Observed mechanisms activating the recent subpolar North Atlantic Warming since 2016 |
title_short |
Observed mechanisms activating the recent subpolar North Atlantic Warming since 2016 |
title_full |
Observed mechanisms activating the recent subpolar North Atlantic Warming since 2016 |
title_fullStr |
Observed mechanisms activating the recent subpolar North Atlantic Warming since 2016 |
title_full_unstemmed |
Observed mechanisms activating the recent subpolar North Atlantic Warming since 2016 |
title_sort |
observed mechanisms activating the recent subpolar north atlantic warming since 2016 |
publisher |
The Royal Society |
publishDate |
2023 |
url |
https://doi.org/10.1098/rsta.2022.0183 |
genre |
north atlantic current North Atlantic North Atlantic oscillation |
genre_facet |
north atlantic current North Atlantic North Atlantic oscillation |
op_source |
Philosophical Transactions of the Royal Society, 381(2262), (2023-10-23) |
op_relation |
https://zenodo.org/communities/epoc https://doi.org/10.1098/rsta.2022.0183 oai:zenodo.org:10676500 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.1098/rsta.2022.0183 |
container_title |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
381 |
container_issue |
2262 |
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1809923685045239808 |