On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation

Autores
Lilienthal, Friederike; Jacobi, Christoph; Schmidt, Torsten; de la Torre, Alejandro; Alexander, Pedro Manfredo
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A mechanistic global circulation model is used to simulate the Southern Hemisphere stratospheric, mesospheric, and lower thermospheric circulation during austral winter. The model includes a gravity wave (GW) parameterization that is initiated by prescribed 2-D fields of GW parameters in the troposphere. These are based on observations of GW potential energy calculated using GPS radio occultations and show enhanced GW activity east of the Andes and around the Antarctic. In order to detect the influence of an observation-based and thus realistic 2-D GW distribution on the middle atmosphere circulation, we perform model experiments with zonal mean and 2-D GW initialization, and additionally with and without forcing of stationary planetary waves (SPWs) at the lower boundary of the model. As a result, we find additional forcing of SPWs in the stratosphere, a weaker zonal wind jet in the mesosphere, cooling of the mesosphere and warming near the mesopause above the jet. SPW wavenumber 1 (SPW1) amplitudes are generally increased by about 10ĝ€% when GWs are introduced being longitudinally dependent. However, at the upper part of the zonal wind jet, SPW1 in zonal wind and GW acceleration are out of phase, which reduces the amplitudes there.
Fil: Lilienthal, Friederike. University Of Leipzig; Alemania
Fil: Jacobi, Christoph. University Of Leipzig; Alemania
Fil: Schmidt, Torsten. Geoforschungszentrum Potsdam; Alemania
Fil: de la Torre, Alejandro. Universidad Austral; Argentina
Fil: Alexander, Pedro Manfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Materia
Meteorology And Atmospheric Dynamics (Middle Atmosphere Dynamics)
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/54432
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulationLilienthal, FriederikeJacobi, ChristophSchmidt, Torstende la Torre, AlejandroAlexander, Pedro ManfredoMeteorology And Atmospheric Dynamics (Middle Atmosphere Dynamics)https://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1A mechanistic global circulation model is used to simulate the Southern Hemisphere stratospheric, mesospheric, and lower thermospheric circulation during austral winter. The model includes a gravity wave (GW) parameterization that is initiated by prescribed 2-D fields of GW parameters in the troposphere. These are based on observations of GW potential energy calculated using GPS radio occultations and show enhanced GW activity east of the Andes and around the Antarctic. In order to detect the influence of an observation-based and thus realistic 2-D GW distribution on the middle atmosphere circulation, we perform model experiments with zonal mean and 2-D GW initialization, and additionally with and without forcing of stationary planetary waves (SPWs) at the lower boundary of the model. As a result, we find additional forcing of SPWs in the stratosphere, a weaker zonal wind jet in the mesosphere, cooling of the mesosphere and warming near the mesopause above the jet. SPW wavenumber 1 (SPW1) amplitudes are generally increased by about 10ĝ€% when GWs are introduced being longitudinally dependent. However, at the upper part of the zonal wind jet, SPW1 in zonal wind and GW acceleration are out of phase, which reduces the amplitudes there.Fil: Lilienthal, Friederike. University Of Leipzig; AlemaniaFil: Jacobi, Christoph. University Of Leipzig; AlemaniaFil: Schmidt, Torsten. Geoforschungszentrum Potsdam; AlemaniaFil: de la Torre, Alejandro. Universidad Austral; ArgentinaFil: Alexander, Pedro Manfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaCopernicus Publications2017-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/54432Lilienthal, Friederike; Jacobi, Christoph; Schmidt, Torsten; de la Torre, Alejandro; Alexander, Pedro Manfredo; On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation; Copernicus Publications; Annales Geophysicae; 35; 4; 7-2017; 785-7981432-0576CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.ann-geophys.net/35/785/2017/info:eu-repo/semantics/altIdentifier/doi/10.5194/angeo-35-785-2017info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:13:21Zoai:ri.conicet.gov.ar:11336/54432instacron: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:34982025-10-15 15:13:22.073CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation
title On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation
spellingShingle On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation
Lilienthal, Friederike
Meteorology And Atmospheric Dynamics (Middle Atmosphere Dynamics)
title_short On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation
title_full On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation
title_fullStr On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation
title_full_unstemmed On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation
title_sort On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation
dc.creator.none.fl_str_mv Lilienthal, Friederike
Jacobi, Christoph
Schmidt, Torsten
de la Torre, Alejandro
Alexander, Pedro Manfredo
author Lilienthal, Friederike
author_facet Lilienthal, Friederike
Jacobi, Christoph
Schmidt, Torsten
de la Torre, Alejandro
Alexander, Pedro Manfredo
author_role author
author2 Jacobi, Christoph
Schmidt, Torsten
de la Torre, Alejandro
Alexander, Pedro Manfredo
author2_role author
author
author
author
dc.subject.none.fl_str_mv Meteorology And Atmospheric Dynamics (Middle Atmosphere Dynamics)
topic Meteorology And Atmospheric Dynamics (Middle Atmosphere Dynamics)
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A mechanistic global circulation model is used to simulate the Southern Hemisphere stratospheric, mesospheric, and lower thermospheric circulation during austral winter. The model includes a gravity wave (GW) parameterization that is initiated by prescribed 2-D fields of GW parameters in the troposphere. These are based on observations of GW potential energy calculated using GPS radio occultations and show enhanced GW activity east of the Andes and around the Antarctic. In order to detect the influence of an observation-based and thus realistic 2-D GW distribution on the middle atmosphere circulation, we perform model experiments with zonal mean and 2-D GW initialization, and additionally with and without forcing of stationary planetary waves (SPWs) at the lower boundary of the model. As a result, we find additional forcing of SPWs in the stratosphere, a weaker zonal wind jet in the mesosphere, cooling of the mesosphere and warming near the mesopause above the jet. SPW wavenumber 1 (SPW1) amplitudes are generally increased by about 10ĝ€% when GWs are introduced being longitudinally dependent. However, at the upper part of the zonal wind jet, SPW1 in zonal wind and GW acceleration are out of phase, which reduces the amplitudes there.
Fil: Lilienthal, Friederike. University Of Leipzig; Alemania
Fil: Jacobi, Christoph. University Of Leipzig; Alemania
Fil: Schmidt, Torsten. Geoforschungszentrum Potsdam; Alemania
Fil: de la Torre, Alejandro. Universidad Austral; Argentina
Fil: Alexander, Pedro Manfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
description A mechanistic global circulation model is used to simulate the Southern Hemisphere stratospheric, mesospheric, and lower thermospheric circulation during austral winter. The model includes a gravity wave (GW) parameterization that is initiated by prescribed 2-D fields of GW parameters in the troposphere. These are based on observations of GW potential energy calculated using GPS radio occultations and show enhanced GW activity east of the Andes and around the Antarctic. In order to detect the influence of an observation-based and thus realistic 2-D GW distribution on the middle atmosphere circulation, we perform model experiments with zonal mean and 2-D GW initialization, and additionally with and without forcing of stationary planetary waves (SPWs) at the lower boundary of the model. As a result, we find additional forcing of SPWs in the stratosphere, a weaker zonal wind jet in the mesosphere, cooling of the mesosphere and warming near the mesopause above the jet. SPW wavenumber 1 (SPW1) amplitudes are generally increased by about 10ĝ€% when GWs are introduced being longitudinally dependent. However, at the upper part of the zonal wind jet, SPW1 in zonal wind and GW acceleration are out of phase, which reduces the amplitudes there.
publishDate 2017
dc.date.none.fl_str_mv 2017-07
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/11336/54432
Lilienthal, Friederike; Jacobi, Christoph; Schmidt, Torsten; de la Torre, Alejandro; Alexander, Pedro Manfredo; On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation; Copernicus Publications; Annales Geophysicae; 35; 4; 7-2017; 785-798
1432-0576
CONICET Digital
CONICET
url http://hdl.handle.net/11336/54432
identifier_str_mv Lilienthal, Friederike; Jacobi, Christoph; Schmidt, Torsten; de la Torre, Alejandro; Alexander, Pedro Manfredo; On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation; Copernicus Publications; Annales Geophysicae; 35; 4; 7-2017; 785-798
1432-0576
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://www.ann-geophys.net/35/785/2017/
info:eu-repo/semantics/altIdentifier/doi/10.5194/angeo-35-785-2017
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Copernicus Publications
publisher.none.fl_str_mv Copernicus Publications
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
_version_ 1846083281586487296
score 13.22299

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