Separating and quantifying the distinct impacts of El Niño and sudden stratospheric warmings on North Atlantic and Eurasian wintertime climate
Abstract Sudden stratospheric warmings (SSWs) significantly influence Eurasian wintertime climate. The El Niño phase of the El Niño–Southern Oscillation (ENSO) also affects climate in that region through tropospheric and stratospheric pathways, including increased SSW frequency. However, most SSWs a...
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ftdoajarticles:oai:doaj.org/article:1b9f6ee57ea246f1b30088c38b47d83b 2023-05-15T17:28:21+02:00 Separating and quantifying the distinct impacts of El Niño and sudden stratospheric warmings on North Atlantic and Eurasian wintertime climate Jessica Oehrlein Gabriel Chiodo Lorenzo M. Polvani 2019-07-01T00:00:00Z https://doi.org/10.1002/asl.923 https://doaj.org/article/1b9f6ee57ea246f1b30088c38b47d83b EN eng Wiley https://doi.org/10.1002/asl.923 https://doaj.org/toc/1530-261X 1530-261X doi:10.1002/asl.923 https://doaj.org/article/1b9f6ee57ea246f1b30088c38b47d83b Atmospheric Science Letters, Vol 20, Iss 7, Pp n/a-n/a (2019) climate variability ENSO North Atlantic Oscillation stratosphere–troposphere coupling sudden stratospheric warming Meteorology. Climatology QC851-999 article 2019 ftdoajarticles https://doi.org/10.1002/asl.923 2022-12-31T07:21:25Z Abstract Sudden stratospheric warmings (SSWs) significantly influence Eurasian wintertime climate. The El Niño phase of the El Niño–Southern Oscillation (ENSO) also affects climate in that region through tropospheric and stratospheric pathways, including increased SSW frequency. However, most SSWs are unrelated to El Niño, and their importance compared to other El Niño pathways remains to be quantified. We here contrast these two sources of variability using two 200‐member ensembles of 1‐year integrations of the Whole Atmosphere Community Climate Model, one ensemble with prescribed El Niño sea surface temperatures (SSTs) and one with neutral‐ENSO SSTs. We form composites of wintertime climate anomalies, with and without SSWs, in each ensemble and contrast them to a basic state represented by neutral‐ENSO winters without SSWs. We find that El Niño and SSWs both result in negative North Atlantic Oscillation anomalies and have comparable impacts on European precipitation, but SSWs cause larger Eurasian cooling. Our results have implications for predictability of wintertime Eurasian climate. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Atmospheric Science Letters 20 7 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
climate variability ENSO North Atlantic Oscillation stratosphere–troposphere coupling sudden stratospheric warming Meteorology. Climatology QC851-999 |
spellingShingle |
climate variability ENSO North Atlantic Oscillation stratosphere–troposphere coupling sudden stratospheric warming Meteorology. Climatology QC851-999 Jessica Oehrlein Gabriel Chiodo Lorenzo M. Polvani Separating and quantifying the distinct impacts of El Niño and sudden stratospheric warmings on North Atlantic and Eurasian wintertime climate |
topic_facet |
climate variability ENSO North Atlantic Oscillation stratosphere–troposphere coupling sudden stratospheric warming Meteorology. Climatology QC851-999 |
description |
Abstract Sudden stratospheric warmings (SSWs) significantly influence Eurasian wintertime climate. The El Niño phase of the El Niño–Southern Oscillation (ENSO) also affects climate in that region through tropospheric and stratospheric pathways, including increased SSW frequency. However, most SSWs are unrelated to El Niño, and their importance compared to other El Niño pathways remains to be quantified. We here contrast these two sources of variability using two 200‐member ensembles of 1‐year integrations of the Whole Atmosphere Community Climate Model, one ensemble with prescribed El Niño sea surface temperatures (SSTs) and one with neutral‐ENSO SSTs. We form composites of wintertime climate anomalies, with and without SSWs, in each ensemble and contrast them to a basic state represented by neutral‐ENSO winters without SSWs. We find that El Niño and SSWs both result in negative North Atlantic Oscillation anomalies and have comparable impacts on European precipitation, but SSWs cause larger Eurasian cooling. Our results have implications for predictability of wintertime Eurasian climate. |
format |
Article in Journal/Newspaper |
author |
Jessica Oehrlein Gabriel Chiodo Lorenzo M. Polvani |
author_facet |
Jessica Oehrlein Gabriel Chiodo Lorenzo M. Polvani |
author_sort |
Jessica Oehrlein |
title |
Separating and quantifying the distinct impacts of El Niño and sudden stratospheric warmings on North Atlantic and Eurasian wintertime climate |
title_short |
Separating and quantifying the distinct impacts of El Niño and sudden stratospheric warmings on North Atlantic and Eurasian wintertime climate |
title_full |
Separating and quantifying the distinct impacts of El Niño and sudden stratospheric warmings on North Atlantic and Eurasian wintertime climate |
title_fullStr |
Separating and quantifying the distinct impacts of El Niño and sudden stratospheric warmings on North Atlantic and Eurasian wintertime climate |
title_full_unstemmed |
Separating and quantifying the distinct impacts of El Niño and sudden stratospheric warmings on North Atlantic and Eurasian wintertime climate |
title_sort |
separating and quantifying the distinct impacts of el niño and sudden stratospheric warmings on north atlantic and eurasian wintertime climate |
publisher |
Wiley |
publishDate |
2019 |
url |
https://doi.org/10.1002/asl.923 https://doaj.org/article/1b9f6ee57ea246f1b30088c38b47d83b |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Atmospheric Science Letters, Vol 20, Iss 7, Pp n/a-n/a (2019) |
op_relation |
https://doi.org/10.1002/asl.923 https://doaj.org/toc/1530-261X 1530-261X doi:10.1002/asl.923 https://doaj.org/article/1b9f6ee57ea246f1b30088c38b47d83b |
op_doi |
https://doi.org/10.1002/asl.923 |
container_title |
Atmospheric Science Letters |
container_volume |
20 |
container_issue |
7 |
_version_ |
1766120970632822784 |