Effects of the PDO phase on the tropical belt width

Autores
Grassi, Barbara; Redaelli, Gianluca; Canziani, Pablo Osvaldo; Visconti, Guido
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Recent studies have shown that the Tropical Belt (TB) has progressively expanded since at least the late 1970´s. This trend has been largely attributed to the radiative forcing due to GHG increase and stratospheric ozone depletion, even if an influence of Sea Surface Temperature (SST) anomalies has been also suggested. In this work we investigate the impact of the Pacific Decadal Oscillation (PDO) on the TB width. The study is performed by using both AMIP (Atmospheric Model Intercomparison Project) and idealized simulations, produced by NCAR/CAM3 GCM, and reanalysis data (ERA-Interim, ERA-40 and MERRA). Reanalysis show that a switch of the PDO from a positive to a negative phase can lead to a significant TB expansion during the equinoxes. This effect, indicating a possible PDO contribution to the widening that characterized the TB width during the last decades, is not correctly reproduced by model simulations. Deficiencies in the sensitivity of model simulated convective processes to SST anomalies are suggested as a possible cause of the TB widening underestimation.
Fil: Grassi, Barbara. University of L’Aquila; Italia
Fil: Redaelli, Gianluca. University of L’Aquila; Italia
Fil: Canziani, Pablo Osvaldo. Pontificia Universidad Católica Argentina "Santa María de los Buenos Aires"; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Visconti, Guido. University of L’Aquila; Italia
Materia
GENERAL CIRCULATION MODELS
PACIFIC DECADAL OSCILLATION
TROPICAL VARIABILTY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/193799
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/193799
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Effects of the PDO phase on the tropical belt widthGrassi, BarbaraRedaelli, GianlucaCanziani, Pablo OsvaldoVisconti, GuidoGENERAL CIRCULATION MODELSPACIFIC DECADAL OSCILLATIONTROPICAL VARIABILTYhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Recent studies have shown that the Tropical Belt (TB) has progressively expanded since at least the late 1970´s. This trend has been largely attributed to the radiative forcing due to GHG increase and stratospheric ozone depletion, even if an influence of Sea Surface Temperature (SST) anomalies has been also suggested. In this work we investigate the impact of the Pacific Decadal Oscillation (PDO) on the TB width. The study is performed by using both AMIP (Atmospheric Model Intercomparison Project) and idealized simulations, produced by NCAR/CAM3 GCM, and reanalysis data (ERA-Interim, ERA-40 and MERRA). Reanalysis show that a switch of the PDO from a positive to a negative phase can lead to a significant TB expansion during the equinoxes. This effect, indicating a possible PDO contribution to the widening that characterized the TB width during the last decades, is not correctly reproduced by model simulations. Deficiencies in the sensitivity of model simulated convective processes to SST anomalies are suggested as a possible cause of the TB widening underestimation.Fil: Grassi, Barbara. University of L’Aquila; ItaliaFil: Redaelli, Gianluca. University of L’Aquila; ItaliaFil: Canziani, Pablo Osvaldo. Pontificia Universidad Católica Argentina "Santa María de los Buenos Aires"; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Visconti, Guido. University of L’Aquila; ItaliaAmer Meteorological Soc2011-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/193799Grassi, Barbara; Redaelli, Gianluca; Canziani, Pablo Osvaldo; Visconti, Guido; Effects of the PDO phase on the tropical belt width; Amer Meteorological Soc; Journal Of Climate; 25; 9; 11-2011; 3282-32900894-8755CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://journals.ametsoc.org/view/journals/clim/25/9/jcli-d-11-00244.1.xmlinfo:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-11-00244.1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:48:46Zoai:ri.conicet.gov.ar:11336/193799instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:48:46.715CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Effects of the PDO phase on the tropical belt width
title Effects of the PDO phase on the tropical belt width
spellingShingle Effects of the PDO phase on the tropical belt width
Grassi, Barbara
GENERAL CIRCULATION MODELS
PACIFIC DECADAL OSCILLATION
TROPICAL VARIABILTY
title_short Effects of the PDO phase on the tropical belt width
title_full Effects of the PDO phase on the tropical belt width
title_fullStr Effects of the PDO phase on the tropical belt width
title_full_unstemmed Effects of the PDO phase on the tropical belt width
title_sort Effects of the PDO phase on the tropical belt width
dc.creator.none.fl_str_mv Grassi, Barbara
Redaelli, Gianluca
Canziani, Pablo Osvaldo
Visconti, Guido
author Grassi, Barbara
author_facet Grassi, Barbara
Redaelli, Gianluca
Canziani, Pablo Osvaldo
Visconti, Guido
author_role author
author2 Redaelli, Gianluca
Canziani, Pablo Osvaldo
Visconti, Guido
author2_role author
author
author
dc.subject.none.fl_str_mv GENERAL CIRCULATION MODELS
PACIFIC DECADAL OSCILLATION
TROPICAL VARIABILTY
topic GENERAL CIRCULATION MODELS
PACIFIC DECADAL OSCILLATION
TROPICAL VARIABILTY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Recent studies have shown that the Tropical Belt (TB) has progressively expanded since at least the late 1970´s. This trend has been largely attributed to the radiative forcing due to GHG increase and stratospheric ozone depletion, even if an influence of Sea Surface Temperature (SST) anomalies has been also suggested. In this work we investigate the impact of the Pacific Decadal Oscillation (PDO) on the TB width. The study is performed by using both AMIP (Atmospheric Model Intercomparison Project) and idealized simulations, produced by NCAR/CAM3 GCM, and reanalysis data (ERA-Interim, ERA-40 and MERRA). Reanalysis show that a switch of the PDO from a positive to a negative phase can lead to a significant TB expansion during the equinoxes. This effect, indicating a possible PDO contribution to the widening that characterized the TB width during the last decades, is not correctly reproduced by model simulations. Deficiencies in the sensitivity of model simulated convective processes to SST anomalies are suggested as a possible cause of the TB widening underestimation.
Fil: Grassi, Barbara. University of L’Aquila; Italia
Fil: Redaelli, Gianluca. University of L’Aquila; Italia
Fil: Canziani, Pablo Osvaldo. Pontificia Universidad Católica Argentina "Santa María de los Buenos Aires"; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Visconti, Guido. University of L’Aquila; Italia
description Recent studies have shown that the Tropical Belt (TB) has progressively expanded since at least the late 1970´s. This trend has been largely attributed to the radiative forcing due to GHG increase and stratospheric ozone depletion, even if an influence of Sea Surface Temperature (SST) anomalies has been also suggested. In this work we investigate the impact of the Pacific Decadal Oscillation (PDO) on the TB width. The study is performed by using both AMIP (Atmospheric Model Intercomparison Project) and idealized simulations, produced by NCAR/CAM3 GCM, and reanalysis data (ERA-Interim, ERA-40 and MERRA). Reanalysis show that a switch of the PDO from a positive to a negative phase can lead to a significant TB expansion during the equinoxes. This effect, indicating a possible PDO contribution to the widening that characterized the TB width during the last decades, is not correctly reproduced by model simulations. Deficiencies in the sensitivity of model simulated convective processes to SST anomalies are suggested as a possible cause of the TB widening underestimation.
publishDate 2011
dc.date.none.fl_str_mv 2011-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/193799
Grassi, Barbara; Redaelli, Gianluca; Canziani, Pablo Osvaldo; Visconti, Guido; Effects of the PDO phase on the tropical belt width; Amer Meteorological Soc; Journal Of Climate; 25; 9; 11-2011; 3282-3290
0894-8755
CONICET Digital
CONICET
url http://hdl.handle.net/11336/193799
identifier_str_mv Grassi, Barbara; Redaelli, Gianluca; Canziani, Pablo Osvaldo; Visconti, Guido; Effects of the PDO phase on the tropical belt width; Amer Meteorological Soc; Journal Of Climate; 25; 9; 11-2011; 3282-3290
0894-8755
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://journals.ametsoc.org/view/journals/clim/25/9/jcli-d-11-00244.1.xml
info:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-11-00244.1
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Amer Meteorological Soc
publisher.none.fl_str_mv Amer Meteorological Soc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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