Multiple drivers of the North Atlantic warming hole
The North Atlantic ocean warming hole has been linked to reduced tropical heat import. Model simulations show an anthropogenically forced increased heat export poleward from the region, by overturning and gyre circulation, and shortwave cloud feedback control the warming hole formation and growth. D...
Published in: | Nature Climate Change |
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Stockholms universitet, Meteorologiska institutionen (MISU)
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-183982 https://doi.org/10.1038/s41558-020-0819-8 |
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ftstockholmuniv:oai:DiVA.org:su-183982 2023-05-15T17:28:43+02:00 Multiple drivers of the North Atlantic warming hole Keil, Paul Mauritsen, Thorsten Jungclaus, Johann Hedemann, Christopher Olonscheck, Dirk Ghosh, Rohit 2020 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-183982 https://doi.org/10.1038/s41558-020-0819-8 eng eng Stockholms universitet, Meteorologiska institutionen (MISU) Max Planck Institute for Meteorology, Germany Nature Climate Change, 1758-678X, 2020, 10:7, s. 667-671 orcid:0000-0002-6502-4148 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-183982 doi:10.1038/s41558-020-0819-8 ISI:000544168800001 info:eu-repo/semantics/openAccess Earth and Related Environmental Sciences Geovetenskap och miljövetenskap Article in journal info:eu-repo/semantics/article text 2020 ftstockholmuniv https://doi.org/10.1038/s41558-020-0819-8 2023-02-23T21:42:42Z The North Atlantic ocean warming hole has been linked to reduced tropical heat import. Model simulations show an anthropogenically forced increased heat export poleward from the region, by overturning and gyre circulation, and shortwave cloud feedback control the warming hole formation and growth. Despite global warming, a region in the North Atlantic ocean has been observed to cool, a phenomenon known as the warming hole. Its emergence has been linked to a slowdown of the Atlantic meridional overturning circulation, which leads to a reduced ocean heat transport into the warming hole region. Here we show that, in addition to the reduced low-latitude heat import, increased ocean heat transport out of the region into higher latitudes and a shortwave cloud feedback dominate the formation and temporal evolution of the warming hole under greenhouse gas forcing. In climate model simulations of the historical period, the low-latitude Atlantic meridional overturning circulation decline does not emerge from natural variability, whereas the accelerating heat transport to higher latitudes is clearly attributable to anthropogenic forcing. Both the overturning and the gyre circulation contribute to the increased high-latitude ocean heat transport, and therefore are critical to understand the past and future evolutions of the warming hole. Article in Journal/Newspaper North Atlantic Stockholm University: Publications (DiVA) Nature Climate Change 10 7 667 671 |
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Open Polar |
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Stockholm University: Publications (DiVA) |
op_collection_id |
ftstockholmuniv |
language |
English |
topic |
Earth and Related Environmental Sciences Geovetenskap och miljövetenskap |
spellingShingle |
Earth and Related Environmental Sciences Geovetenskap och miljövetenskap Keil, Paul Mauritsen, Thorsten Jungclaus, Johann Hedemann, Christopher Olonscheck, Dirk Ghosh, Rohit Multiple drivers of the North Atlantic warming hole |
topic_facet |
Earth and Related Environmental Sciences Geovetenskap och miljövetenskap |
description |
The North Atlantic ocean warming hole has been linked to reduced tropical heat import. Model simulations show an anthropogenically forced increased heat export poleward from the region, by overturning and gyre circulation, and shortwave cloud feedback control the warming hole formation and growth. Despite global warming, a region in the North Atlantic ocean has been observed to cool, a phenomenon known as the warming hole. Its emergence has been linked to a slowdown of the Atlantic meridional overturning circulation, which leads to a reduced ocean heat transport into the warming hole region. Here we show that, in addition to the reduced low-latitude heat import, increased ocean heat transport out of the region into higher latitudes and a shortwave cloud feedback dominate the formation and temporal evolution of the warming hole under greenhouse gas forcing. In climate model simulations of the historical period, the low-latitude Atlantic meridional overturning circulation decline does not emerge from natural variability, whereas the accelerating heat transport to higher latitudes is clearly attributable to anthropogenic forcing. Both the overturning and the gyre circulation contribute to the increased high-latitude ocean heat transport, and therefore are critical to understand the past and future evolutions of the warming hole. |
format |
Article in Journal/Newspaper |
author |
Keil, Paul Mauritsen, Thorsten Jungclaus, Johann Hedemann, Christopher Olonscheck, Dirk Ghosh, Rohit |
author_facet |
Keil, Paul Mauritsen, Thorsten Jungclaus, Johann Hedemann, Christopher Olonscheck, Dirk Ghosh, Rohit |
author_sort |
Keil, Paul |
title |
Multiple drivers of the North Atlantic warming hole |
title_short |
Multiple drivers of the North Atlantic warming hole |
title_full |
Multiple drivers of the North Atlantic warming hole |
title_fullStr |
Multiple drivers of the North Atlantic warming hole |
title_full_unstemmed |
Multiple drivers of the North Atlantic warming hole |
title_sort |
multiple drivers of the north atlantic warming hole |
publisher |
Stockholms universitet, Meteorologiska institutionen (MISU) |
publishDate |
2020 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-183982 https://doi.org/10.1038/s41558-020-0819-8 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Nature Climate Change, 1758-678X, 2020, 10:7, s. 667-671 orcid:0000-0002-6502-4148 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-183982 doi:10.1038/s41558-020-0819-8 ISI:000544168800001 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41558-020-0819-8 |
container_title |
Nature Climate Change |
container_volume |
10 |
container_issue |
7 |
container_start_page |
667 |
op_container_end_page |
671 |
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1766121581361233920 |