Characterization of ENSO in a stratosphere-resolving version of the EC-EARTH model: comparison with observations and with the low-top version

Màster de Meteorologia, Facultat de Física, Universitat de Barcelona, Curs: 2019-2020, Tutors: Ileana Bladé Mendoza, Javier García Serrano

Detalles Bibliográficos
Autor: Rodrigo Sánchez, Mario
Tipo de recurso: tesis de maestría
Fecha de publicación:2020
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/172873
Acceso en línea:https://hdl.handle.net/2445/172873
Access Level:acceso abierto
Palabra clave:El Niño-oscil·lació del sud
Estratosfera
Treballs de fi de màster
El Niño–Southern Oscillation
Stratosphere
Master's theses
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spelling Characterization of ENSO in a stratosphere-resolving version of the EC-EARTH model: comparison with observations and with the low-top versionRodrigo Sánchez, MarioEl Niño-oscil·lació del sudEstratosferaTreballs de fi de màsterEl Niño–Southern OscillationStratosphereMaster's thesesMàster de Meteorologia, Facultat de Física, Universitat de Barcelona, Curs: 2019-2020, Tutors: Ileana Bladé Mendoza, Javier García SerranoA stratosphere-resolving configuration (HIGH-TOP) of the EC-EARTH global climate model (GCM) is used to characterize the El Ni~no-Southern Oscillation (ENSO) and compare it to observations. Despite the state of the art stratosphere, HIGH-TOP still presents some biases in the seasonal cycle and in the ENSO spatial pattern common to other GCMs. The interannual peak in the Ni~no3.4 index power spectrum is broadly captured, but the model is biased towards lower frequencies. To assess the effects of a well-resolved stratosphere in the tropical Pacific and, in particular, on ENSO, HIGH-TOP is compared with a low-top version of the model (LOW-TOP). HIGH-TOP displays systematic and statistically significant higher interannual variability in the central-eastern Pacific, along with an improvement in the ENSO pattern of sea surface temperature (SST) anomalies. The comparison of the ENSO-induced tropospheric circulation anomalies reveals a strengthening of the eastern Pacifc intertropical convergence zone (ITCZ) in HIGH-TOP with respect to LOW-TOP. Additionally, in the equatorial eastern Pacific, HIGH-TOP correctly simulates anomalous upward motion, while LOW-TOP simulates anomalous downward motion that enhances the climatological Walker circulation. The stronger ITCZ and the anomalous ascent in the eastern equatorial Pacific in HIGH-TOP are consistent with the higher total interannual variability in SST and precipitation in HIGH-TOP. Hence, incorporating a well-resolved stratosphere in the EC-EARTH model yields a more realistic representation of the variability in the central-eastern Pacific and tropical ENSO pattern.Bladé, IleanaGarcía-Serrano, Javier, 1980-2020info:eu-repo/semantics/masterThesisapplication/pdfhttps://hdl.handle.net/2445/172873Màster Oficial - Meteorologiareponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaIngléscc-by-nc-nd (c) Rodrigo, 2020http://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1728732026-05-27T06:46:51Z
dc.title.none.fl_str_mv Characterization of ENSO in a stratosphere-resolving version of the EC-EARTH model: comparison with observations and with the low-top version
title Characterization of ENSO in a stratosphere-resolving version of the EC-EARTH model: comparison with observations and with the low-top version
spellingShingle Characterization of ENSO in a stratosphere-resolving version of the EC-EARTH model: comparison with observations and with the low-top version
Rodrigo Sánchez, Mario
El Niño-oscil·lació del sud
Estratosfera
Treballs de fi de màster
El Niño–Southern Oscillation
Stratosphere
Master's theses
title_short Characterization of ENSO in a stratosphere-resolving version of the EC-EARTH model: comparison with observations and with the low-top version
title_full Characterization of ENSO in a stratosphere-resolving version of the EC-EARTH model: comparison with observations and with the low-top version
title_fullStr Characterization of ENSO in a stratosphere-resolving version of the EC-EARTH model: comparison with observations and with the low-top version
title_full_unstemmed Characterization of ENSO in a stratosphere-resolving version of the EC-EARTH model: comparison with observations and with the low-top version
title_sort Characterization of ENSO in a stratosphere-resolving version of the EC-EARTH model: comparison with observations and with the low-top version
dc.creator.none.fl_str_mv Rodrigo Sánchez, Mario
author Rodrigo Sánchez, Mario
author_facet Rodrigo Sánchez, Mario
author_role author
dc.contributor.none.fl_str_mv Bladé, Ileana
García-Serrano, Javier, 1980-
dc.subject.none.fl_str_mv El Niño-oscil·lació del sud
Estratosfera
Treballs de fi de màster
El Niño–Southern Oscillation
Stratosphere
Master's theses
topic El Niño-oscil·lació del sud
Estratosfera
Treballs de fi de màster
El Niño–Southern Oscillation
Stratosphere
Master's theses
description Màster de Meteorologia, Facultat de Física, Universitat de Barcelona, Curs: 2019-2020, Tutors: Ileana Bladé Mendoza, Javier García Serrano
publishDate 2020
dc.date.none.fl_str_mv 2020
dc.type.none.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/172873
url https://hdl.handle.net/2445/172873
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Rodrigo, 2020
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Rodrigo, 2020
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Màster Oficial - Meteorologia
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
_version_ 1869412893792927745
score 15.300719

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