Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional Model

Autores
Seluchi, Marcelo Enrique; Norte, Federico Augusto; Satyamurty, Prakki; Chou, Sin Chan
Año de publicación
2003
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The zonda is a warm and extremely dry wind that occurs east of the Andes Cordillera in the extratropical latitudes of South America. Its orographic origin is similar to the foehn that blows in Germany and Austria and the chinook that occurs east of the Rocky Mountains. Three typical zonda events of different categories (surface and elevated) are described, through observational and Eta–Centro de Previsa˜o de Tempo e Estudos Clima´ticos (CPTEC) model output. During the events the temperature rises sharply by 108–158C and the dewpoint temperature drops by 158–208C in an interval of a few hours. The sustained wind strength at the surface increases to 30 kt, with gusts of more than 40 kt. The episodes generally start around midday and last for about 10 h. The Eta–CPTEC model was able to forecast several aspects of the three analyzed zonda cases, such as wind strength, temperature, and humidity changes, and their starting and ending times. Some relationships between the intensity of the windward static stability and the zonda occurrence were observed. The synoptic pressure configuration resulting from frontal passages associated with depressions that moved over lower than normal latitudes preceded the zonda occurrence. Sensitivity experiments showed that if the Andes were lower, more frequent but less intense zonda episodes could be expected.
Fil: Seluchi, Marcelo Enrique. Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista. Centro de Previsão de Tempo e Estudos Climáticos.; Brasil
Fil: Norte, Federico Augusto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Satyamurty, Prakki. Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista. Centro de Previsão de Tempo e Estudos Climáticos.; Brasil
Fil: Chou, Sin Chan. Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista. Centro de Previsão de Tempo e Estudos Climáticos.; Brasil
Materia
Foehn Effect
Viento Zonda
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/40961
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/40961
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional ModelSeluchi, Marcelo EnriqueNorte, Federico AugustoSatyamurty, PrakkiChou, Sin ChanFoehn EffectViento Zondahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The zonda is a warm and extremely dry wind that occurs east of the Andes Cordillera in the extratropical latitudes of South America. Its orographic origin is similar to the foehn that blows in Germany and Austria and the chinook that occurs east of the Rocky Mountains. Three typical zonda events of different categories (surface and elevated) are described, through observational and Eta–Centro de Previsa˜o de Tempo e Estudos Clima´ticos (CPTEC) model output. During the events the temperature rises sharply by 108–158C and the dewpoint temperature drops by 158–208C in an interval of a few hours. The sustained wind strength at the surface increases to 30 kt, with gusts of more than 40 kt. The episodes generally start around midday and last for about 10 h. The Eta–CPTEC model was able to forecast several aspects of the three analyzed zonda cases, such as wind strength, temperature, and humidity changes, and their starting and ending times. Some relationships between the intensity of the windward static stability and the zonda occurrence were observed. The synoptic pressure configuration resulting from frontal passages associated with depressions that moved over lower than normal latitudes preceded the zonda occurrence. Sensitivity experiments showed that if the Andes were lower, more frequent but less intense zonda episodes could be expected.Fil: Seluchi, Marcelo Enrique. Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista. Centro de Previsão de Tempo e Estudos Climáticos.; BrasilFil: Norte, Federico Augusto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Satyamurty, Prakki. Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista. Centro de Previsão de Tempo e Estudos Climáticos.; BrasilFil: Chou, Sin Chan. Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista. Centro de Previsão de Tempo e Estudos Climáticos.; BrasilAmerican Meteorological Society2003-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/40961Seluchi, Marcelo Enrique; Norte, Federico Augusto; Satyamurty, Prakki; Chou, Sin Chan; Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional Model; American Meteorological Society; Weather And Forecasting; 18; 3; 6-2003; 481-5010882-81561520-0434CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://journals.ametsoc.org/doi/abs/10.1175/1520-0434%282003%2918%3C481%3AAOTSOT%3E2.0.CO%3B2info:eu-repo/semantics/altIdentifier/doi/10.1175/1520-0434(2003)18%3C481:AOTSOT%3E2.0.CO;2info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:22:03Zoai:ri.conicet.gov.ar:11336/40961instacron: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 15:22:03.921CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional Model
title Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional Model
spellingShingle Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional Model
Seluchi, Marcelo Enrique
Foehn Effect
Viento Zonda
title_short Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional Model
title_full Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional Model
title_fullStr Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional Model
title_full_unstemmed Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional Model
title_sort Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional Model
dc.creator.none.fl_str_mv Seluchi, Marcelo Enrique
Norte, Federico Augusto
Satyamurty, Prakki
Chou, Sin Chan
author Seluchi, Marcelo Enrique
author_facet Seluchi, Marcelo Enrique
Norte, Federico Augusto
Satyamurty, Prakki
Chou, Sin Chan
author_role author
author2 Norte, Federico Augusto
Satyamurty, Prakki
Chou, Sin Chan
author2_role author
author
author
dc.subject.none.fl_str_mv Foehn Effect
Viento Zonda
topic Foehn Effect
Viento Zonda
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The zonda is a warm and extremely dry wind that occurs east of the Andes Cordillera in the extratropical latitudes of South America. Its orographic origin is similar to the foehn that blows in Germany and Austria and the chinook that occurs east of the Rocky Mountains. Three typical zonda events of different categories (surface and elevated) are described, through observational and Eta–Centro de Previsa˜o de Tempo e Estudos Clima´ticos (CPTEC) model output. During the events the temperature rises sharply by 108–158C and the dewpoint temperature drops by 158–208C in an interval of a few hours. The sustained wind strength at the surface increases to 30 kt, with gusts of more than 40 kt. The episodes generally start around midday and last for about 10 h. The Eta–CPTEC model was able to forecast several aspects of the three analyzed zonda cases, such as wind strength, temperature, and humidity changes, and their starting and ending times. Some relationships between the intensity of the windward static stability and the zonda occurrence were observed. The synoptic pressure configuration resulting from frontal passages associated with depressions that moved over lower than normal latitudes preceded the zonda occurrence. Sensitivity experiments showed that if the Andes were lower, more frequent but less intense zonda episodes could be expected.
Fil: Seluchi, Marcelo Enrique. Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista. Centro de Previsão de Tempo e Estudos Climáticos.; Brasil
Fil: Norte, Federico Augusto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
Fil: Satyamurty, Prakki. Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista. Centro de Previsão de Tempo e Estudos Climáticos.; Brasil
Fil: Chou, Sin Chan. Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista. Centro de Previsão de Tempo e Estudos Climáticos.; Brasil
description The zonda is a warm and extremely dry wind that occurs east of the Andes Cordillera in the extratropical latitudes of South America. Its orographic origin is similar to the foehn that blows in Germany and Austria and the chinook that occurs east of the Rocky Mountains. Three typical zonda events of different categories (surface and elevated) are described, through observational and Eta–Centro de Previsa˜o de Tempo e Estudos Clima´ticos (CPTEC) model output. During the events the temperature rises sharply by 108–158C and the dewpoint temperature drops by 158–208C in an interval of a few hours. The sustained wind strength at the surface increases to 30 kt, with gusts of more than 40 kt. The episodes generally start around midday and last for about 10 h. The Eta–CPTEC model was able to forecast several aspects of the three analyzed zonda cases, such as wind strength, temperature, and humidity changes, and their starting and ending times. Some relationships between the intensity of the windward static stability and the zonda occurrence were observed. The synoptic pressure configuration resulting from frontal passages associated with depressions that moved over lower than normal latitudes preceded the zonda occurrence. Sensitivity experiments showed that if the Andes were lower, more frequent but less intense zonda episodes could be expected.
publishDate 2003
dc.date.none.fl_str_mv 2003-06
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/11336/40961
Seluchi, Marcelo Enrique; Norte, Federico Augusto; Satyamurty, Prakki; Chou, Sin Chan; Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional Model; American Meteorological Society; Weather And Forecasting; 18; 3; 6-2003; 481-501
0882-8156
1520-0434
CONICET Digital
CONICET
url http://hdl.handle.net/11336/40961
identifier_str_mv Seluchi, Marcelo Enrique; Norte, Federico Augusto; Satyamurty, Prakki; Chou, Sin Chan; Analysis of Three Situations of the Foehn Effect over the Andes (Zonda Wind) Using the Eta–CPTEC Regional Model; American Meteorological Society; Weather And Forecasting; 18; 3; 6-2003; 481-501
0882-8156
1520-0434
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://journals.ametsoc.org/doi/abs/10.1175/1520-0434%282003%2918%3C481%3AAOTSOT%3E2.0.CO%3B2
info:eu-repo/semantics/altIdentifier/doi/10.1175/1520-0434(2003)18%3C481:AOTSOT%3E2.0.CO;2
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Meteorological Society
publisher.none.fl_str_mv American Meteorological Society
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_ 1846083367973421056
score 13.22299

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