On the relationship between Atlantic meridional overturning circulation slowdown and global surface warming
According to established understanding, deep-water formation in the North Atlantic and Southern Ocean keeps the deep ocean cold, counter-acting the downward mixing of heat from the warmer surface waters in the bulk of the world ocean. Therefore, periods of strong Atlantic meridional overturning circ...
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ftleibnizopen:oai:oai.leibnizopen.de:WDiJYIgBdbrxVwz6GE3s 2023-06-11T04:14:41+02:00 On the relationship between Atlantic meridional overturning circulation slowdown and global surface warming Caesar, L. Rahmstorf, S. Feulner, G. 2020 application/pdf https://oa.tib.eu/renate/handle/123456789/10063 https://doi.org/10.34657/9101 eng eng Bristol : IOP Publ. CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ Environmental research letters : ERL 15 (2020), Nr. 2 Atlantic meridional overturning circulation global surface warming ocean heat uptake 690 article Text 2020 ftleibnizopen https://doi.org/10.34657/9101 2023-05-28T23:12:59Z According to established understanding, deep-water formation in the North Atlantic and Southern Ocean keeps the deep ocean cold, counter-acting the downward mixing of heat from the warmer surface waters in the bulk of the world ocean. Therefore, periods of strong Atlantic meridional overturning circulation (AMOC) are expected to coincide with cooling of the deep ocean and warming of the surface waters. It has recently been proposed that this relation may have reversed due to global warming, and that during the past decades a strong AMOC coincides with warming of the deep ocean and relative cooling of the surface, by transporting increasingly warmer waters downward. Here we present multiple lines of evidence, including a statistical evaluation of the observed global mean temperature, ocean heat content, and different AMOC proxies, that lead to the opposite conclusion: even during the current ongoing global temperature rise a strong AMOC warms the surface. The observed weakening of the AMOC has therefore delayed global surface warming rather than enhancing it publishedVersion Article in Journal/Newspaper North Atlantic Southern Ocean LeibnizOpen (The Leibniz Association) Southern Ocean |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
Atlantic meridional overturning circulation global surface warming ocean heat uptake 690 |
spellingShingle |
Atlantic meridional overturning circulation global surface warming ocean heat uptake 690 Caesar, L. Rahmstorf, S. Feulner, G. On the relationship between Atlantic meridional overturning circulation slowdown and global surface warming |
topic_facet |
Atlantic meridional overturning circulation global surface warming ocean heat uptake 690 |
description |
According to established understanding, deep-water formation in the North Atlantic and Southern Ocean keeps the deep ocean cold, counter-acting the downward mixing of heat from the warmer surface waters in the bulk of the world ocean. Therefore, periods of strong Atlantic meridional overturning circulation (AMOC) are expected to coincide with cooling of the deep ocean and warming of the surface waters. It has recently been proposed that this relation may have reversed due to global warming, and that during the past decades a strong AMOC coincides with warming of the deep ocean and relative cooling of the surface, by transporting increasingly warmer waters downward. Here we present multiple lines of evidence, including a statistical evaluation of the observed global mean temperature, ocean heat content, and different AMOC proxies, that lead to the opposite conclusion: even during the current ongoing global temperature rise a strong AMOC warms the surface. The observed weakening of the AMOC has therefore delayed global surface warming rather than enhancing it publishedVersion |
format |
Article in Journal/Newspaper |
author |
Caesar, L. Rahmstorf, S. Feulner, G. |
author_facet |
Caesar, L. Rahmstorf, S. Feulner, G. |
author_sort |
Caesar, L. |
title |
On the relationship between Atlantic meridional overturning circulation slowdown and global surface warming |
title_short |
On the relationship between Atlantic meridional overturning circulation slowdown and global surface warming |
title_full |
On the relationship between Atlantic meridional overturning circulation slowdown and global surface warming |
title_fullStr |
On the relationship between Atlantic meridional overturning circulation slowdown and global surface warming |
title_full_unstemmed |
On the relationship between Atlantic meridional overturning circulation slowdown and global surface warming |
title_sort |
on the relationship between atlantic meridional overturning circulation slowdown and global surface warming |
publisher |
Bristol : IOP Publ. |
publishDate |
2020 |
url |
https://oa.tib.eu/renate/handle/123456789/10063 https://doi.org/10.34657/9101 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
Environmental research letters : ERL 15 (2020), Nr. 2 |
op_rights |
CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.34657/9101 |
_version_ |
1768370901254930432 |