On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation
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 troposp...
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ftconicet:oai:ri.conicet.gov.ar:11336/54432 2023-10-09T21:46:04+02:00 On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation Lilienthal, Friederike Jacobi, Christoph Schmidt, Torsten de la Torre, Alejandro Alexander, Pedro Manfredo application/pdf http://hdl.handle.net/11336/54432 eng eng Copernicus Publications 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 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 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ Meteorology And Atmospheric Dynamics (Middle Atmosphere Dynamics) https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.5194/angeo-35-785-2017 2023-09-24T19:44:12Z 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 Article in Journal/Newspaper Antarc* Antarctic CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Austral Argentina Torre ENVELOPE(-59.729,-59.729,-62.413,-62.413) Lilienthal ENVELOPE(-60.700,-60.700,-64.333,-64.333) Annales Geophysicae 35 4 785 798 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Meteorology And Atmospheric Dynamics (Middle Atmosphere Dynamics) https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Meteorology And Atmospheric Dynamics (Middle Atmosphere Dynamics) https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 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 |
topic_facet |
Meteorology And Atmospheric Dynamics (Middle Atmosphere Dynamics) https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
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. 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 |
format |
Article in Journal/Newspaper |
author |
Lilienthal, Friederike Jacobi, Christoph Schmidt, Torsten de la Torre, Alejandro Alexander, Pedro Manfredo |
author_facet |
Lilienthal, Friederike Jacobi, Christoph Schmidt, Torsten de la Torre, Alejandro Alexander, Pedro Manfredo |
author_sort |
Lilienthal, Friederike |
title |
On the influence of zonal gravity wave distributions on the Southern Hemisphere winter circulation |
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 |
publisher |
Copernicus Publications |
url |
http://hdl.handle.net/11336/54432 |
long_lat |
ENVELOPE(-59.729,-59.729,-62.413,-62.413) ENVELOPE(-60.700,-60.700,-64.333,-64.333) |
geographic |
Antarctic The Antarctic Austral Argentina Torre Lilienthal |
geographic_facet |
Antarctic The Antarctic Austral Argentina Torre Lilienthal |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
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 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 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
op_doi |
https://doi.org/10.5194/angeo-35-785-2017 |
container_title |
Annales Geophysicae |
container_volume |
35 |
container_issue |
4 |
container_start_page |
785 |
op_container_end_page |
798 |
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1779321728041746432 |