The impact of wave number selection and spin-up time in spectral nudging

The present work studies two relevant parameters from spectral nudging. First, the cut-off wave number, which effectively separates the nudged scales from the free running ones. And, second, the spin-up time, which determines how much time is needed to reach a balance between the nudging force and t...

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Detalles Bibliográficos
Autor: Gómez Hombre, Breogán Xacobo
Tipo de recurso: tesis doctoral
Fecha de publicación:2019
País:España
Institución:Universidad de Santiago de Compostela (USC)
Repositorio:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
Idioma:inglés
OAI Identifier:oai:minerva.usc.gal:10347/19894
Acceso en línea:http://hdl.handle.net/10347/19894
Access Level:acceso abierto
Palabra clave:Materias::Investigación::25 Ciencias de la tierra y del espacio::2509 Metereología::250909 Predicción numérica meteorológica
Materias::Investigación::25 Ciencias de la tierra y del espacio::2509 Metereología::250918 Meteorología tropical
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spelling The impact of wave number selection and spin-up time in spectral nudgingGómez Hombre, Breogán XacoboMaterias::Investigación::25 Ciencias de la tierra y del espacio::2509 Metereología::250909 Predicción numérica meteorológicaMaterias::Investigación::25 Ciencias de la tierra y del espacio::2509 Metereología::250918 Meteorología tropicalThe present work studies two relevant parameters from spectral nudging. First, the cut-off wave number, which effectively separates the nudged scales from the free running ones. And, second, the spin-up time, which determines how much time is needed to reach a balance between the nudging force and the model internal climate. Our results show that the optimal cut-off wave number coincides with the Rossby Radius of Deformation, both in mid and tropical latitudes, suggesting that this parameter is related with the dynamic characteristics of the modelled area, and not with features of the experiment design. The optimal spin-up time is found to be 24/48h for mid latitudes and 72/96h for tropical latitudes. We also study the suitability of spectral nudging as an initialisation technique. Our results indicate that it is beneficial to use some nudging technique at the beginning of the simulation, but we have not found relevant differences between grid nudging and spectral nudging.Míguez Macho, GonzaloUniversidade de Santiago de Compostela. Centro Internacional de Estudos de Doutoramento e Avanzados (CIEDUS)Universidade de Santiago de Compostela. Escola de Doutoramento Internacional en Ciencias e Tecnoloxía20192019-01-0120192019-01-01doctoral thesishttp://purl.org/coar/resource_type/c_db06info:eu-repo/semantics/doctoralThesisapplication/pdfhttp://hdl.handle.net/10347/19894reponame:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostelainstname:Universidad de Santiago de Compostela (USC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:minerva.usc.gal:10347/198942026-06-15T12:47:27Z
dc.title.none.fl_str_mv The impact of wave number selection and spin-up time in spectral nudging
title The impact of wave number selection and spin-up time in spectral nudging
spellingShingle The impact of wave number selection and spin-up time in spectral nudging
Gómez Hombre, Breogán Xacobo
Materias::Investigación::25 Ciencias de la tierra y del espacio::2509 Metereología::250909 Predicción numérica meteorológica
Materias::Investigación::25 Ciencias de la tierra y del espacio::2509 Metereología::250918 Meteorología tropical
title_short The impact of wave number selection and spin-up time in spectral nudging
title_full The impact of wave number selection and spin-up time in spectral nudging
title_fullStr The impact of wave number selection and spin-up time in spectral nudging
title_full_unstemmed The impact of wave number selection and spin-up time in spectral nudging
title_sort The impact of wave number selection and spin-up time in spectral nudging
dc.creator.none.fl_str_mv Gómez Hombre, Breogán Xacobo
author Gómez Hombre, Breogán Xacobo
author_facet Gómez Hombre, Breogán Xacobo
author_role author
dc.contributor.none.fl_str_mv Míguez Macho, Gonzalo
Universidade de Santiago de Compostela. Centro Internacional de Estudos de Doutoramento e Avanzados (CIEDUS)
Universidade de Santiago de Compostela. Escola de Doutoramento Internacional en Ciencias e Tecnoloxía
dc.subject.none.fl_str_mv Materias::Investigación::25 Ciencias de la tierra y del espacio::2509 Metereología::250909 Predicción numérica meteorológica
Materias::Investigación::25 Ciencias de la tierra y del espacio::2509 Metereología::250918 Meteorología tropical
topic Materias::Investigación::25 Ciencias de la tierra y del espacio::2509 Metereología::250909 Predicción numérica meteorológica
Materias::Investigación::25 Ciencias de la tierra y del espacio::2509 Metereología::250918 Meteorología tropical
description The present work studies two relevant parameters from spectral nudging. First, the cut-off wave number, which effectively separates the nudged scales from the free running ones. And, second, the spin-up time, which determines how much time is needed to reach a balance between the nudging force and the model internal climate. Our results show that the optimal cut-off wave number coincides with the Rossby Radius of Deformation, both in mid and tropical latitudes, suggesting that this parameter is related with the dynamic characteristics of the modelled area, and not with features of the experiment design. The optimal spin-up time is found to be 24/48h for mid latitudes and 72/96h for tropical latitudes. We also study the suitability of spectral nudging as an initialisation technique. Our results indicate that it is beneficial to use some nudging technique at the beginning of the simulation, but we have not found relevant differences between grid nudging and spectral nudging.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-01-01
2019
2019-01-01
dc.type.none.fl_str_mv doctoral thesis
http://purl.org/coar/resource_type/c_db06
dc.type.openaire.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
dc.identifier.none.fl_str_mv http://hdl.handle.net/10347/19894
url http://hdl.handle.net/10347/19894
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
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
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
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
instname:Universidad de Santiago de Compostela (USC)
instname_str Universidad de Santiago de Compostela (USC)
reponame_str Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
collection Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
repository.name.fl_str_mv
repository.mail.fl_str_mv
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