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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/40961
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T10:24:53Zoai: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:34982025-09-29 10:24:53.608CONICET 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 |
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1844614246295404544 |
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13.070432 |