Quasi-Biennial Oscillation influence on tropical convection and El Niño variability

The Quasi‐Biennial Oscillation (QBO) of descending zonal winds is the leading mode of tropical stratospheric variability. Numerous studies have explored its connection with the troposphere, including its sensitivity to El Niño‐Southern Oscillation (ENSO). While it is accepted that an upward ENSO imp...

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Authors: Rodrigo Sánchez, Mario, García-Serrano, Javier, 1980-, Bladé, Ileana
Format: article
Status:Published version
Publication Date:2025
Country:España
Institution:Universidad de Barcelona
Repository:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/223680
Online Access:https://hdl.handle.net/2445/223680
Access Level:Open access
Keyword:Estratosfera
Oscil·lacions
Corrent del Niño
Stratosphere
Oscillations
El Niño Current
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spelling Quasi-Biennial Oscillation influence on tropical convection and El Niño variabilityRodrigo Sánchez, MarioGarcía-Serrano, Javier, 1980-Bladé, IleanaEstratosferaOscil·lacionsCorrent del NiñoStratosphereOscillationsEl Niño CurrentThe Quasi‐Biennial Oscillation (QBO) of descending zonal winds is the leading mode of tropical stratospheric variability. Numerous studies have explored its connection with the troposphere, including its sensitivity to El Niño‐Southern Oscillation (ENSO). While it is accepted that an upward ENSO impact on the QBO exists, little investigation has been devoted to the potential downward influence of the QBO. Observational and model evidence show that the QBO modulates upper‐tropospheric divergence, with reduced outflow over the Maritime Continent during the westerly phase. It can also impact the warm phase of ENSO, El Niño, characterized by a weakened Walker circulation. Results show that the westerly phase of the QBO further suppresses tropical convection in the western Pacific and thus accentuates the weakening of the Walker circulation during El Niño. These results suggest that considering the QBO state could improve El Niño prediction and projection, particularly for extreme events.American Geophysical Union (AGU)2025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/223680Articles publicats en revistes (Física Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1029/2024GL112854Geophysical Research Letters, 2025, vol. 52, num.10https://doi.org/10.1029/2024GL112854cc-by-nc-nd (c) American Geophysical Union (AGU), 2025http://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2236802026-05-27T06:46:51Z
dc.title.none.fl_str_mv Quasi-Biennial Oscillation influence on tropical convection and El Niño variability
title Quasi-Biennial Oscillation influence on tropical convection and El Niño variability
spellingShingle Quasi-Biennial Oscillation influence on tropical convection and El Niño variability
Rodrigo Sánchez, Mario
Estratosfera
Oscil·lacions
Corrent del Niño
Stratosphere
Oscillations
El Niño Current
title_short Quasi-Biennial Oscillation influence on tropical convection and El Niño variability
title_full Quasi-Biennial Oscillation influence on tropical convection and El Niño variability
title_fullStr Quasi-Biennial Oscillation influence on tropical convection and El Niño variability
title_full_unstemmed Quasi-Biennial Oscillation influence on tropical convection and El Niño variability
title_sort Quasi-Biennial Oscillation influence on tropical convection and El Niño variability
dc.creator.none.fl_str_mv Rodrigo Sánchez, Mario
García-Serrano, Javier, 1980-
Bladé, Ileana
author Rodrigo Sánchez, Mario
author_facet Rodrigo Sánchez, Mario
García-Serrano, Javier, 1980-
Bladé, Ileana
author_role author
author2 García-Serrano, Javier, 1980-
Bladé, Ileana
author2_role author
author
dc.subject.none.fl_str_mv Estratosfera
Oscil·lacions
Corrent del Niño
Stratosphere
Oscillations
El Niño Current
topic Estratosfera
Oscil·lacions
Corrent del Niño
Stratosphere
Oscillations
El Niño Current
description The Quasi‐Biennial Oscillation (QBO) of descending zonal winds is the leading mode of tropical stratospheric variability. Numerous studies have explored its connection with the troposphere, including its sensitivity to El Niño‐Southern Oscillation (ENSO). While it is accepted that an upward ENSO impact on the QBO exists, little investigation has been devoted to the potential downward influence of the QBO. Observational and model evidence show that the QBO modulates upper‐tropospheric divergence, with reduced outflow over the Maritime Continent during the westerly phase. It can also impact the warm phase of ENSO, El Niño, characterized by a weakened Walker circulation. Results show that the westerly phase of the QBO further suppresses tropical convection in the western Pacific and thus accentuates the weakening of the Walker circulation during El Niño. These results suggest that considering the QBO state could improve El Niño prediction and projection, particularly for extreme events.
publishDate 2025
dc.date.none.fl_str_mv 2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/223680
url https://hdl.handle.net/2445/223680
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1029/2024GL112854
Geophysical Research Letters, 2025, vol. 52, num.10
https://doi.org/10.1029/2024GL112854
dc.rights.none.fl_str_mv cc-by-nc-nd (c) American Geophysical Union (AGU), 2025
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) American Geophysical Union (AGU), 2025
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union (AGU)
publisher.none.fl_str_mv American Geophysical Union (AGU)
dc.source.none.fl_str_mv Articles publicats en revistes (Física Aplicada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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