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...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10590666/ http://www.ncbi.nlm.nih.gov/pubmed/37866383 https://doi.org/10.1098/rsta.2022.0183 |
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ftpubmed:oai:pubmedcentral.nih.gov:10590666 2023-11-12T04:21:30+01:00 Observed mechanisms activating the recent subpolar North Atlantic Warming since 2016 Chafik, Léon Penny Holliday, N. Bacon, Sheldon Baker, Jonathan A. Desbruyères, Damien Frajka-Williams, Eleanor Jackson, Laura C. 2023-12-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10590666/ http://www.ncbi.nlm.nih.gov/pubmed/37866383 https://doi.org/10.1098/rsta.2022.0183 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10590666/ http://www.ncbi.nlm.nih.gov/pubmed/37866383 http://dx.doi.org/10.1098/rsta.2022.0183 © 2023 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. Philos Trans A Math Phys Eng Sci Articles Text 2023 ftpubmed https://doi.org/10.1098/rsta.2022.0183 2023-10-29T00:45:57Z 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’. Text north atlantic current North Atlantic North Atlantic oscillation PubMed Central (PMC) Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 381 2262 |
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Articles Chafik, Léon Penny Holliday, N. Bacon, Sheldon Baker, Jonathan A. Desbruyères, Damien Frajka-Williams, Eleanor Jackson, Laura C. Observed mechanisms activating the recent subpolar North Atlantic Warming since 2016 |
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Articles |
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 |
Text |
author |
Chafik, Léon Penny Holliday, N. Bacon, Sheldon Baker, Jonathan A. Desbruyères, Damien Frajka-Williams, Eleanor Jackson, Laura C. |
author_facet |
Chafik, Léon Penny Holliday, N. 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 |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10590666/ http://www.ncbi.nlm.nih.gov/pubmed/37866383 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 |
Philos Trans A Math Phys Eng Sci |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10590666/ http://www.ncbi.nlm.nih.gov/pubmed/37866383 http://dx.doi.org/10.1098/rsta.2022.0183 |
op_rights |
© 2023 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
op_doi |
https://doi.org/10.1098/rsta.2022.0183 |
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Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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381 |
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2262 |
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1782336878520827904 |