Analysis of the ENSO signal in tropospheric and stratospheric temperatures observed by MSU, 1979-2000

The El Niño-Southern Oscillation (ENSO) signal in the troposphere and lower stratosphere was investigated using Microwave Sounding Unit (MSU) data for the period 1979-2000. Empirical orthogonal functions (EOFs) were computed separately for zonal-mean and eddy temperatures in the Tropics and shown to...

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Autores: Calvo Fernández, Natalia, García, Rolando R., García Herrera, Ricardo Francisco, Gallego Puyol, David, Gimeno Presa, Luis, Hernández Martín, Emiliano, Ribera Rodríguez, Pedro
Formato: artículo
Fecha de publicación:2004
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/51079
Acesso em linha:https://hdl.handle.net/20.500.14352/51079
Access Level:acceso abierto
Palavra-chave:52
Sea-surface temperature
Quasi-biennial oscillation
Niño southern-oscillation
Northern-hemisphere
El-niño
Interannual variability
Circulation
Atmosphere
Anomalies
Pacific
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
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oai_identifier_str oai:docta.ucm.es:20.500.14352/51079
network_acronym_str ES
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spelling Analysis of the ENSO signal in tropospheric and stratospheric temperatures observed by MSU, 1979-2000Calvo Fernández, NataliaGarcía, Rolando R.García Herrera, Ricardo FranciscoGallego Puyol, DavidGimeno Presa, LuisHernández Martín, EmilianoRibera Rodríguez, Pedro52Sea-surface temperatureQuasi-biennial oscillationNiño southern-oscillationNorthern-hemisphereEl-niñoInterannual variabilityCirculationAtmosphereAnomaliesPacificAstrofísicaAstronomía (Física)Física atmosférica2501 Ciencias de la AtmósferaThe El Niño-Southern Oscillation (ENSO) signal in the troposphere and lower stratosphere was investigated using Microwave Sounding Unit (MSU) data for the period 1979-2000. Empirical orthogonal functions (EOFs) were computed separately for zonal-mean and eddy temperatures in the Tropics and shown to provide a compact, physically intuitive description of ENSO that captures many of the details of its inception and evolution. Regressions of the MSU data on the principal components (PCs) of the tropical EOFs were then used to estimate the global signal of ENSO. The results show that ENSO accounts for over two-thirds of the temperature variability in the tropical troposphere, where its signature is composed of distinct zonal-mean and eddy patterns whose evolution is not simultaneous. In the tropical stratosphere, and outside the Tropics, ENSO explains a much smaller fraction of the variance (similar to10%), and manifests itself purely in the form of eddy anomaly patterns. The PCs of the eddy EOFs of the tropical stratosphere are almost perfectly correlated with those of the troposphere, suggesting that together the EOFs describe the vertical structure of equatorial waves. Volcanic eruptions and the quasi-biennial oscillation (QBO) are responsible for most of the variability (similar to87%) of the tropical lower stratosphere, and this variability is uncorrelated with ENSO; in the tropical troposphere, the effect of volcanic eruptions is detectable but small, accounting for about 3% of the variance.American Meteorological SocietyUniversidad Complutense de Madrid20042004-10-0120042004-10-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/51079reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/510792026-06-02T12:44:21Z
dc.title.none.fl_str_mv Analysis of the ENSO signal in tropospheric and stratospheric temperatures observed by MSU, 1979-2000
title Analysis of the ENSO signal in tropospheric and stratospheric temperatures observed by MSU, 1979-2000
spellingShingle Analysis of the ENSO signal in tropospheric and stratospheric temperatures observed by MSU, 1979-2000
Calvo Fernández, Natalia
52
Sea-surface temperature
Quasi-biennial oscillation
Niño southern-oscillation
Northern-hemisphere
El-niño
Interannual variability
Circulation
Atmosphere
Anomalies
Pacific
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
title_short Analysis of the ENSO signal in tropospheric and stratospheric temperatures observed by MSU, 1979-2000
title_full Analysis of the ENSO signal in tropospheric and stratospheric temperatures observed by MSU, 1979-2000
title_fullStr Analysis of the ENSO signal in tropospheric and stratospheric temperatures observed by MSU, 1979-2000
title_full_unstemmed Analysis of the ENSO signal in tropospheric and stratospheric temperatures observed by MSU, 1979-2000
title_sort Analysis of the ENSO signal in tropospheric and stratospheric temperatures observed by MSU, 1979-2000
dc.creator.none.fl_str_mv Calvo Fernández, Natalia
García, Rolando R.
García Herrera, Ricardo Francisco
Gallego Puyol, David
Gimeno Presa, Luis
Hernández Martín, Emiliano
Ribera Rodríguez, Pedro
author Calvo Fernández, Natalia
author_facet Calvo Fernández, Natalia
García, Rolando R.
García Herrera, Ricardo Francisco
Gallego Puyol, David
Gimeno Presa, Luis
Hernández Martín, Emiliano
Ribera Rodríguez, Pedro
author_role author
author2 García, Rolando R.
García Herrera, Ricardo Francisco
Gallego Puyol, David
Gimeno Presa, Luis
Hernández Martín, Emiliano
Ribera Rodríguez, Pedro
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
Sea-surface temperature
Quasi-biennial oscillation
Niño southern-oscillation
Northern-hemisphere
El-niño
Interannual variability
Circulation
Atmosphere
Anomalies
Pacific
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
topic 52
Sea-surface temperature
Quasi-biennial oscillation
Niño southern-oscillation
Northern-hemisphere
El-niño
Interannual variability
Circulation
Atmosphere
Anomalies
Pacific
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
description The El Niño-Southern Oscillation (ENSO) signal in the troposphere and lower stratosphere was investigated using Microwave Sounding Unit (MSU) data for the period 1979-2000. Empirical orthogonal functions (EOFs) were computed separately for zonal-mean and eddy temperatures in the Tropics and shown to provide a compact, physically intuitive description of ENSO that captures many of the details of its inception and evolution. Regressions of the MSU data on the principal components (PCs) of the tropical EOFs were then used to estimate the global signal of ENSO. The results show that ENSO accounts for over two-thirds of the temperature variability in the tropical troposphere, where its signature is composed of distinct zonal-mean and eddy patterns whose evolution is not simultaneous. In the tropical stratosphere, and outside the Tropics, ENSO explains a much smaller fraction of the variance (similar to10%), and manifests itself purely in the form of eddy anomaly patterns. The PCs of the eddy EOFs of the tropical stratosphere are almost perfectly correlated with those of the troposphere, suggesting that together the EOFs describe the vertical structure of equatorial waves. Volcanic eruptions and the quasi-biennial oscillation (QBO) are responsible for most of the variability (similar to87%) of the tropical lower stratosphere, and this variability is uncorrelated with ENSO; in the tropical troposphere, the effect of volcanic eruptions is detectable but small, accounting for about 3% of the variance.
publishDate 2004
dc.date.none.fl_str_mv 2004
2004-10-01
2004
2004-10-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/51079
url https://hdl.handle.net/20.500.14352/51079
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Meteorological Society
publisher.none.fl_str_mv American Meteorological Society
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869425171874447360
score 15,300724

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