Mechanisms of the QBO influence on the tropical troposphere: climatological SST conditions

The Quasi-Biennial Oscillation (QBO), the leading mode of tropical stratospheric variability, is thought to influence the tropical troposphere. Disentangling this influence from the dominant effects of El Niño-Southern Oscillation (ENSO) remains challenging. In this study, we use an atmosphere-only...

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Detalles Bibliográficos
Autores: Rodrigo Sánchez, Mario, García-Franco, Jorge Luis, García-Serrano, Javier, 1980-, Bladé, Ileana, Palmeiro, Froila M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/224877
Acceso en línea:https://hdl.handle.net/2445/224877
Access Level:acceso abierto
Palabra clave:Oscil·lacions
Corrent del Niño
Estratosfera
Oscillations
El Niño Current
Stratosphere
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spelling Mechanisms of the QBO influence on the tropical troposphere: climatological SST conditionsRodrigo Sánchez, MarioGarcía-Franco, Jorge LuisGarcía-Serrano, Javier, 1980-Bladé, IleanaPalmeiro, Froila M.Oscil·lacionsCorrent del NiñoEstratosferaOscillationsEl Niño CurrentStratosphereThe Quasi-Biennial Oscillation (QBO), the leading mode of tropical stratospheric variability, is thought to influence the tropical troposphere. Disentangling this influence from the dominant effects of El Niño-Southern Oscillation (ENSO) remains challenging. In this study, we use an atmosphere-only experiment with climatological sea surface temperature to isolate the tropospheric impact of the QBO, while a companion article examines how ENSO further affects this impact. The analysis focuses on the QBO modulation of temperature and zonal wind in the upper troposphere-lower stratosphere (UTLS) and the accompanying effects on static stability, wind shear and vorticity. Our results show that the QBO modifies deep tropical convection over the Maritime Continent region, and affects both the zonal Walker circulation and, more notably, the meridional Hadley circulation. These impacts are highly seasonal, with the strongest effects in summer and autumn. A zonal asymmetry in the vertical structure of the QBO signal and its influence on tropical circulation is identified, with anomalies descending into the upper troposphere over the Indo-Pacific region. Our results also suggest that the timing of this teleconnection is primarily associated with QBO-induced changes in static stability, which exhibit a strong correlation with precipitation and arrive first at the UTLS, followed by changes in wind shear and vorticity.Wiley2025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/224877Articles publicats en revistes (Física Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1029/2025JD044183Journal of Geophysical Research: Atmospheres, 2025, vol. 130, num.22https://doi.org/10.1029/2025JD044183(c) American Geophysical Union (AGU), 2025info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2248772026-05-27T06:46:51Z
dc.title.none.fl_str_mv Mechanisms of the QBO influence on the tropical troposphere: climatological SST conditions
title Mechanisms of the QBO influence on the tropical troposphere: climatological SST conditions
spellingShingle Mechanisms of the QBO influence on the tropical troposphere: climatological SST conditions
Rodrigo Sánchez, Mario
Oscil·lacions
Corrent del Niño
Estratosfera
Oscillations
El Niño Current
Stratosphere
title_short Mechanisms of the QBO influence on the tropical troposphere: climatological SST conditions
title_full Mechanisms of the QBO influence on the tropical troposphere: climatological SST conditions
title_fullStr Mechanisms of the QBO influence on the tropical troposphere: climatological SST conditions
title_full_unstemmed Mechanisms of the QBO influence on the tropical troposphere: climatological SST conditions
title_sort Mechanisms of the QBO influence on the tropical troposphere: climatological SST conditions
dc.creator.none.fl_str_mv Rodrigo Sánchez, Mario
García-Franco, Jorge Luis
García-Serrano, Javier, 1980-
Bladé, Ileana
Palmeiro, Froila M.
author Rodrigo Sánchez, Mario
author_facet Rodrigo Sánchez, Mario
García-Franco, Jorge Luis
García-Serrano, Javier, 1980-
Bladé, Ileana
Palmeiro, Froila M.
author_role author
author2 García-Franco, Jorge Luis
García-Serrano, Javier, 1980-
Bladé, Ileana
Palmeiro, Froila M.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Oscil·lacions
Corrent del Niño
Estratosfera
Oscillations
El Niño Current
Stratosphere
topic Oscil·lacions
Corrent del Niño
Estratosfera
Oscillations
El Niño Current
Stratosphere
description The Quasi-Biennial Oscillation (QBO), the leading mode of tropical stratospheric variability, is thought to influence the tropical troposphere. Disentangling this influence from the dominant effects of El Niño-Southern Oscillation (ENSO) remains challenging. In this study, we use an atmosphere-only experiment with climatological sea surface temperature to isolate the tropospheric impact of the QBO, while a companion article examines how ENSO further affects this impact. The analysis focuses on the QBO modulation of temperature and zonal wind in the upper troposphere-lower stratosphere (UTLS) and the accompanying effects on static stability, wind shear and vorticity. Our results show that the QBO modifies deep tropical convection over the Maritime Continent region, and affects both the zonal Walker circulation and, more notably, the meridional Hadley circulation. These impacts are highly seasonal, with the strongest effects in summer and autumn. A zonal asymmetry in the vertical structure of the QBO signal and its influence on tropical circulation is identified, with anomalies descending into the upper troposphere over the Indo-Pacific region. Our results also suggest that the timing of this teleconnection is primarily associated with QBO-induced changes in static stability, which exhibit a strong correlation with precipitation and arrive first at the UTLS, followed by changes in wind shear and vorticity.
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/2445/224877
url https://hdl.handle.net/2445/224877
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/10.1029/2025JD044183
Journal of Geophysical Research: Atmospheres, 2025, vol. 130, num.22
https://doi.org/10.1029/2025JD044183
dc.rights.none.fl_str_mv (c) American Geophysical Union (AGU), 2025
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Geophysical Union (AGU), 2025
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
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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