Decoupling of the Arctic Oscillation and North Atlantic Oscillation in a warmer climate
The North Atlantic Oscillation and the Arctic Oscillation are modes of climate variability affecting temperature and precipitation in the mid-latitudes. Here we use reanalysis data and climate model simulations of historical and warm climates to show that the relationship between the two oscillation...
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Online Access: | http://hdl.handle.net/10281/299668 https://doi.org/10.1038/s41558-020-00966-8 |
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ftunivmilanobic:oai:boa.unimib.it:10281/299668 2024-04-14T08:06:19+00:00 Decoupling of the Arctic Oscillation and North Atlantic Oscillation in a warmer climate Mostafa E. Hamouda Claudia Pasquero Eli Tziperman Hamouda, M Pasquero, C Tziperman, E 2021 http://hdl.handle.net/10281/299668 https://doi.org/10.1038/s41558-020-00966-8 eng eng Nature Research info:eu-repo/semantics/altIdentifier/wos/WOS:000607033900002 volume:11 issue:2 firstpage:137 lastpage:142 numberofpages:6 journal:NATURE CLIMATE CHANGE http://hdl.handle.net/10281/299668 doi:10.1038/s41558-020-00966-8 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85100117963 Climate change Arctic Oscillation North Atlantic Oscillation info:eu-repo/semantics/article 2021 ftunivmilanobic https://doi.org/10.1038/s41558-020-00966-8 2024-03-21T17:17:43Z The North Atlantic Oscillation and the Arctic Oscillation are modes of climate variability affecting temperature and precipitation in the mid-latitudes. Here we use reanalysis data and climate model simulations of historical and warm climates to show that the relationship between the two oscillations changes with climate warming. The two modes are currently highly correlated, as both are strongly influenced by the downward propagation of stratospheric polar vortex anomalies into the troposphere. When considering a very warm climate scenario, the hemispherically defined Arctic Oscillation pattern shifts to reflect variability of the North Pacific storm track, while the regionally defined North Atlantic Oscillation pattern remains stable. The stratosphere remains an important precursor for North Atlantic Oscillation, and surface Eurasian and Aleutian pressure anomalies precede stratospheric anomalies. Idealized general circulation model simulations suggest that these modifications are linked to the stronger warming of the Pacific compared with the slower warming of the Atlantic Ocean. Article in Journal/Newspaper Arctic Climate change North Atlantic North Atlantic oscillation Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) Arctic Pacific Nature Climate Change 11 2 137 142 |
institution |
Open Polar |
collection |
Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) |
op_collection_id |
ftunivmilanobic |
language |
English |
topic |
Climate change Arctic Oscillation North Atlantic Oscillation |
spellingShingle |
Climate change Arctic Oscillation North Atlantic Oscillation Mostafa E. Hamouda Claudia Pasquero Eli Tziperman Decoupling of the Arctic Oscillation and North Atlantic Oscillation in a warmer climate |
topic_facet |
Climate change Arctic Oscillation North Atlantic Oscillation |
description |
The North Atlantic Oscillation and the Arctic Oscillation are modes of climate variability affecting temperature and precipitation in the mid-latitudes. Here we use reanalysis data and climate model simulations of historical and warm climates to show that the relationship between the two oscillations changes with climate warming. The two modes are currently highly correlated, as both are strongly influenced by the downward propagation of stratospheric polar vortex anomalies into the troposphere. When considering a very warm climate scenario, the hemispherically defined Arctic Oscillation pattern shifts to reflect variability of the North Pacific storm track, while the regionally defined North Atlantic Oscillation pattern remains stable. The stratosphere remains an important precursor for North Atlantic Oscillation, and surface Eurasian and Aleutian pressure anomalies precede stratospheric anomalies. Idealized general circulation model simulations suggest that these modifications are linked to the stronger warming of the Pacific compared with the slower warming of the Atlantic Ocean. |
author2 |
Hamouda, M Pasquero, C Tziperman, E |
format |
Article in Journal/Newspaper |
author |
Mostafa E. Hamouda Claudia Pasquero Eli Tziperman |
author_facet |
Mostafa E. Hamouda Claudia Pasquero Eli Tziperman |
author_sort |
Mostafa E. Hamouda |
title |
Decoupling of the Arctic Oscillation and North Atlantic Oscillation in a warmer climate |
title_short |
Decoupling of the Arctic Oscillation and North Atlantic Oscillation in a warmer climate |
title_full |
Decoupling of the Arctic Oscillation and North Atlantic Oscillation in a warmer climate |
title_fullStr |
Decoupling of the Arctic Oscillation and North Atlantic Oscillation in a warmer climate |
title_full_unstemmed |
Decoupling of the Arctic Oscillation and North Atlantic Oscillation in a warmer climate |
title_sort |
decoupling of the arctic oscillation and north atlantic oscillation in a warmer climate |
publisher |
Nature Research |
publishDate |
2021 |
url |
http://hdl.handle.net/10281/299668 https://doi.org/10.1038/s41558-020-00966-8 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Climate change North Atlantic North Atlantic oscillation |
genre_facet |
Arctic Climate change North Atlantic North Atlantic oscillation |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000607033900002 volume:11 issue:2 firstpage:137 lastpage:142 numberofpages:6 journal:NATURE CLIMATE CHANGE http://hdl.handle.net/10281/299668 doi:10.1038/s41558-020-00966-8 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85100117963 |
op_doi |
https://doi.org/10.1038/s41558-020-00966-8 |
container_title |
Nature Climate Change |
container_volume |
11 |
container_issue |
2 |
container_start_page |
137 |
op_container_end_page |
142 |
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1796303098840350720 |