Boreal winter stratospheric climatology in EC-EARTH: CMIP6 version

The performance of the European Consortium Earth-system model (EC-EARTH) in the boreal winter stratosphere is comprehensively assessed for the first time, in particular its version 3.3 that contributes to CMIP6. A 100-year long simulation with prescribed climatological boundary conditions and fixed...

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Detalhes bibliográficos
Autores: Palmeiro Núñez, Froila, García-Serrano, Javier, 1980-, Rodrigo Sánchez, Mario, Abalos, Marta, Christiansen, Bo, Yang, Shuting
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/194571
Acesso em linha:https://hdl.handle.net/2445/194571
Access Level:acceso abierto
Palavra-chave:Climatologia
Estratosfera
Hivern
Climatology
Stratosphere
Winter
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spelling Boreal winter stratospheric climatology in EC-EARTH: CMIP6 versionPalmeiro Núñez, FroilaGarcía-Serrano, Javier, 1980-Rodrigo Sánchez, MarioAbalos, MartaChristiansen, BoYang, ShutingClimatologiaEstratosferaHivernClimatologyStratosphereWinterThe performance of the European Consortium Earth-system model (EC-EARTH) in the boreal winter stratosphere is comprehensively assessed for the first time, in particular its version 3.3 that contributes to CMIP6. A 100-year long simulation with prescribed climatological boundary conditions and fixed radiative forcing, representative of present-day climate, is used to evaluate the simulation of the climatological stratospheric circulation and to identify model biases. Results show that EC-EARTH has a large issue with the vertical distribution of stratospheric temperature from the tropics to mid-latitudes, seemingly linked to radiative processes of ozone, leading to a biased warm middle-upper stratosphere. Associated with this model bias, EC-EARTH simulates a stronger polar vortex at upper-stratospheric levels while the Brewer-Dobson circulation at middle/lower levels is weaker than reanalysis. The amplitude of the climatological planetary waves is overall underestimated, but the magnitude of the background wave injection from the troposphere into the stratosphere is overestimated, related to a weaker polar vortex at lower-stratospheric levels and, thus, a less effective wave filtering. This bias in the westerly flow could have a contribution from parameterized waves. The overestimation of background wave driving is maximum in early-winter, and may explain the overestimated frequency of sudden stratospheric warmings at this time, as compared to reanalysis. The spatial distribution of wave injection climatology has revealed a distinctive role of the climatological planetary waves: while large-scale waves (wavenumbers 1-2) dominate the eddy heat flux over the North Pacific, small-scale waves (wavenumbers 3-4) are responsible for the doubled-lobe structure of the eddy heat flux over Eurasia. EC-EARTH properly simulates this climatological feature, although overestimates its amplitude over central Eurasia.Springer Verlag2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/194571Articles publicats en revistes (Física Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1007/s00382-022-06368-0Climate Dynamics, 2022, vol. 60, p. 883-898https://doi.org/10.1007/s00382-022-06368-0cc-by (c) Palmeiro, Froila M. et al., 2022http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1945712026-05-27T06:46:51Z
dc.title.none.fl_str_mv Boreal winter stratospheric climatology in EC-EARTH: CMIP6 version
title Boreal winter stratospheric climatology in EC-EARTH: CMIP6 version
spellingShingle Boreal winter stratospheric climatology in EC-EARTH: CMIP6 version
Palmeiro Núñez, Froila
Climatologia
Estratosfera
Hivern
Climatology
Stratosphere
Winter
title_short Boreal winter stratospheric climatology in EC-EARTH: CMIP6 version
title_full Boreal winter stratospheric climatology in EC-EARTH: CMIP6 version
title_fullStr Boreal winter stratospheric climatology in EC-EARTH: CMIP6 version
title_full_unstemmed Boreal winter stratospheric climatology in EC-EARTH: CMIP6 version
title_sort Boreal winter stratospheric climatology in EC-EARTH: CMIP6 version
dc.creator.none.fl_str_mv Palmeiro Núñez, Froila
García-Serrano, Javier, 1980-
Rodrigo Sánchez, Mario
Abalos, Marta
Christiansen, Bo
Yang, Shuting
author Palmeiro Núñez, Froila
author_facet Palmeiro Núñez, Froila
García-Serrano, Javier, 1980-
Rodrigo Sánchez, Mario
Abalos, Marta
Christiansen, Bo
Yang, Shuting
author_role author
author2 García-Serrano, Javier, 1980-
Rodrigo Sánchez, Mario
Abalos, Marta
Christiansen, Bo
Yang, Shuting
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Climatologia
Estratosfera
Hivern
Climatology
Stratosphere
Winter
topic Climatologia
Estratosfera
Hivern
Climatology
Stratosphere
Winter
description The performance of the European Consortium Earth-system model (EC-EARTH) in the boreal winter stratosphere is comprehensively assessed for the first time, in particular its version 3.3 that contributes to CMIP6. A 100-year long simulation with prescribed climatological boundary conditions and fixed radiative forcing, representative of present-day climate, is used to evaluate the simulation of the climatological stratospheric circulation and to identify model biases. Results show that EC-EARTH has a large issue with the vertical distribution of stratospheric temperature from the tropics to mid-latitudes, seemingly linked to radiative processes of ozone, leading to a biased warm middle-upper stratosphere. Associated with this model bias, EC-EARTH simulates a stronger polar vortex at upper-stratospheric levels while the Brewer-Dobson circulation at middle/lower levels is weaker than reanalysis. The amplitude of the climatological planetary waves is overall underestimated, but the magnitude of the background wave injection from the troposphere into the stratosphere is overestimated, related to a weaker polar vortex at lower-stratospheric levels and, thus, a less effective wave filtering. This bias in the westerly flow could have a contribution from parameterized waves. The overestimation of background wave driving is maximum in early-winter, and may explain the overestimated frequency of sudden stratospheric warmings at this time, as compared to reanalysis. The spatial distribution of wave injection climatology has revealed a distinctive role of the climatological planetary waves: while large-scale waves (wavenumbers 1-2) dominate the eddy heat flux over the North Pacific, small-scale waves (wavenumbers 3-4) are responsible for the doubled-lobe structure of the eddy heat flux over Eurasia. EC-EARTH properly simulates this climatological feature, although overestimates its amplitude over central Eurasia.
publishDate 2022
dc.date.none.fl_str_mv 2022
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/2445/194571
url https://hdl.handle.net/2445/194571
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/10.1007/s00382-022-06368-0
Climate Dynamics, 2022, vol. 60, p. 883-898
https://doi.org/10.1007/s00382-022-06368-0
dc.rights.none.fl_str_mv cc-by (c) Palmeiro, Froila M. et al., 2022
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Palmeiro, Froila M. et al., 2022
http://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer Verlag
publisher.none.fl_str_mv Springer Verlag
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 15.198674

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