Coupled Feedbacks From the Tropical Pacific to the Atlantic Meridional Overturning Circulation
Abstract The tropical Pacific Ocean is a key regulator of Earth's climate, with teleconnections that influence remote locations all around the world. Here we use partially coupled climate model experiments to show that tropical Pacific cooling related to an abrupt Atlantic Meridional Overturnin...
Published in: | Geophysical Research Letters |
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Online Access: | https://doi.org/10.1029/2023GL103250 https://doaj.org/article/0cb622ec156b494bb6d5811e51828334 |
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ftdoajarticles:oai:doaj.org/article:0cb622ec156b494bb6d5811e51828334 2024-09-15T18:22:11+00:00 Coupled Feedbacks From the Tropical Pacific to the Atlantic Meridional Overturning Circulation Bryam Orihuela‐Pinto Agus Santoso Matthew H. England Andréa S. Taschetto 2023-10-01T00:00:00Z https://doi.org/10.1029/2023GL103250 https://doaj.org/article/0cb622ec156b494bb6d5811e51828334 EN eng Wiley https://doi.org/10.1029/2023GL103250 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL103250 https://doaj.org/article/0cb622ec156b494bb6d5811e51828334 Geophysical Research Letters, Vol 50, Iss 20, Pp n/a-n/a (2023) Atlantic meridional overturning circulation (AMOC) tropical Pacific Pacific‐North Atlantic teleconnection tropical‐extratropical teleconnection interbasin interactions multidecadal timescale Geophysics. Cosmic physics QC801-809 article 2023 ftdoajarticles https://doi.org/10.1029/2023GL103250 2024-08-05T17:49:23Z Abstract The tropical Pacific Ocean is a key regulator of Earth's climate, with teleconnections that influence remote locations all around the world. Here we use partially coupled climate model experiments to show that tropical Pacific cooling related to an abrupt Atlantic Meridional Overturning Circulation (AMOC) slowdown can strengthen the AMOC by ∼25%. This tropical‐extratropical teleconnection occurs initially via atmospheric Rossby waves propagating from the tropical Pacific to the North Atlantic which alter surface climate conditions locally. These changes facilitate ocean heat loss from the subpolar gyre, favoring enhanced oceanic convection. The AMOC strengthening is subsequently enhanced by anomalous northward salt advection in the Atlantic, with a potential contribution from oceanic wave adjustment triggered by increased Southern Ocean westerly winds. These results highlight the influence of the tropical Pacific on the AMOC on multidecadal timescales and suggest that cold phases of tropical Pacific decadal variability could drive temporary strengthening of the AMOC. Article in Journal/Newspaper North Atlantic Southern Ocean Directory of Open Access Journals: DOAJ Articles Geophysical Research Letters 50 20 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Atlantic meridional overturning circulation (AMOC) tropical Pacific Pacific‐North Atlantic teleconnection tropical‐extratropical teleconnection interbasin interactions multidecadal timescale Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Atlantic meridional overturning circulation (AMOC) tropical Pacific Pacific‐North Atlantic teleconnection tropical‐extratropical teleconnection interbasin interactions multidecadal timescale Geophysics. Cosmic physics QC801-809 Bryam Orihuela‐Pinto Agus Santoso Matthew H. England Andréa S. Taschetto Coupled Feedbacks From the Tropical Pacific to the Atlantic Meridional Overturning Circulation |
topic_facet |
Atlantic meridional overturning circulation (AMOC) tropical Pacific Pacific‐North Atlantic teleconnection tropical‐extratropical teleconnection interbasin interactions multidecadal timescale Geophysics. Cosmic physics QC801-809 |
description |
Abstract The tropical Pacific Ocean is a key regulator of Earth's climate, with teleconnections that influence remote locations all around the world. Here we use partially coupled climate model experiments to show that tropical Pacific cooling related to an abrupt Atlantic Meridional Overturning Circulation (AMOC) slowdown can strengthen the AMOC by ∼25%. This tropical‐extratropical teleconnection occurs initially via atmospheric Rossby waves propagating from the tropical Pacific to the North Atlantic which alter surface climate conditions locally. These changes facilitate ocean heat loss from the subpolar gyre, favoring enhanced oceanic convection. The AMOC strengthening is subsequently enhanced by anomalous northward salt advection in the Atlantic, with a potential contribution from oceanic wave adjustment triggered by increased Southern Ocean westerly winds. These results highlight the influence of the tropical Pacific on the AMOC on multidecadal timescales and suggest that cold phases of tropical Pacific decadal variability could drive temporary strengthening of the AMOC. |
format |
Article in Journal/Newspaper |
author |
Bryam Orihuela‐Pinto Agus Santoso Matthew H. England Andréa S. Taschetto |
author_facet |
Bryam Orihuela‐Pinto Agus Santoso Matthew H. England Andréa S. Taschetto |
author_sort |
Bryam Orihuela‐Pinto |
title |
Coupled Feedbacks From the Tropical Pacific to the Atlantic Meridional Overturning Circulation |
title_short |
Coupled Feedbacks From the Tropical Pacific to the Atlantic Meridional Overturning Circulation |
title_full |
Coupled Feedbacks From the Tropical Pacific to the Atlantic Meridional Overturning Circulation |
title_fullStr |
Coupled Feedbacks From the Tropical Pacific to the Atlantic Meridional Overturning Circulation |
title_full_unstemmed |
Coupled Feedbacks From the Tropical Pacific to the Atlantic Meridional Overturning Circulation |
title_sort |
coupled feedbacks from the tropical pacific to the atlantic meridional overturning circulation |
publisher |
Wiley |
publishDate |
2023 |
url |
https://doi.org/10.1029/2023GL103250 https://doaj.org/article/0cb622ec156b494bb6d5811e51828334 |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
Geophysical Research Letters, Vol 50, Iss 20, Pp n/a-n/a (2023) |
op_relation |
https://doi.org/10.1029/2023GL103250 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL103250 https://doaj.org/article/0cb622ec156b494bb6d5811e51828334 |
op_doi |
https://doi.org/10.1029/2023GL103250 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
20 |
_version_ |
1810461620076281856 |