Synoptic structure of severe Zonda downslope windstorms in Argentina

Autores
Otero, Federico; Araneo, Diego Christian; Viale, Maximiliano
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Zonda wind is a characteristic Argentinian downslope windstorm that occurs on the eastern slopes of the Andes Mountains, creating extremely windy, warm and dry conditions with substantial socioeconomic impacts. This study aims to characterise and understand the synoptic-scale atmospheric dynamics, as well as the vertical structure of the atmosphere on both sides of the Andes, associated with severe and long-duration Zonda events compared with non-severe events. Severe events are most frequent between August and October, comprising 64.8% of occurrences. These events exhibit earlier onset and later cessation, resulting in more late-night and morning Zonda hours compared with non-severe events. The synoptic structure for severe and long Zonda events is associated with a more baroclinic structure, featuring a deep trough at both low and mid-levels and shifted west with altitude. Lower levels present higher anomalies and move faster than mid-level anomalies when the wind crosses the Andes. This is accompanied by a deep trough east of the Andes with a tilted axis and a slower eastward movement. The associated upper-level dynamic shows a stronger convergence and divergence pattern on the windward and lee sides of the Andes respectively, along with a stronger, elongated and persistent jet streak. The precipitation pattern is in agreement with the more intense winds impinging on the Andes, resulting in more intense rising motions and more precipitation on the windward slopes. Analysis of the vertical structure in severe events shows a more humid windward profile, especially at low and mid-levels, with stronger winds. The leeward side presents a more unstable temperature profile, warmer at low levels and colder at upper levels, and extreme dryness between low and mid-levels, indicating the presence of the Zonda at this altitude before the event starts. Given the limited studies on Zonda downslope windstorms in South America, this research represents a major step in our understanding of these severe events and provides valuable insights for weather forecasters.
Fil: Otero, Federico. 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: Araneo, Diego Christian. 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: Viale, Maximiliano. 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
Materia
Andes Argentina
Atmospheric dynamics
Pressure systems
Severe foehn
Standarised anomalies
Synoptic circulation
Zonda wind
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/291907
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/291907
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Synoptic structure of severe Zonda downslope windstorms in ArgentinaOtero, FedericoAraneo, Diego ChristianViale, MaximilianoAndes ArgentinaAtmospheric dynamicsPressure systemsSevere foehnStandarised anomaliesSynoptic circulationZonda windhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Zonda wind is a characteristic Argentinian downslope windstorm that occurs on the eastern slopes of the Andes Mountains, creating extremely windy, warm and dry conditions with substantial socioeconomic impacts. This study aims to characterise and understand the synoptic-scale atmospheric dynamics, as well as the vertical structure of the atmosphere on both sides of the Andes, associated with severe and long-duration Zonda events compared with non-severe events. Severe events are most frequent between August and October, comprising 64.8% of occurrences. These events exhibit earlier onset and later cessation, resulting in more late-night and morning Zonda hours compared with non-severe events. The synoptic structure for severe and long Zonda events is associated with a more baroclinic structure, featuring a deep trough at both low and mid-levels and shifted west with altitude. Lower levels present higher anomalies and move faster than mid-level anomalies when the wind crosses the Andes. This is accompanied by a deep trough east of the Andes with a tilted axis and a slower eastward movement. The associated upper-level dynamic shows a stronger convergence and divergence pattern on the windward and lee sides of the Andes respectively, along with a stronger, elongated and persistent jet streak. The precipitation pattern is in agreement with the more intense winds impinging on the Andes, resulting in more intense rising motions and more precipitation on the windward slopes. Analysis of the vertical structure in severe events shows a more humid windward profile, especially at low and mid-levels, with stronger winds. The leeward side presents a more unstable temperature profile, warmer at low levels and colder at upper levels, and extreme dryness between low and mid-levels, indicating the presence of the Zonda at this altitude before the event starts. Given the limited studies on Zonda downslope windstorms in South America, this research represents a major step in our understanding of these severe events and provides valuable insights for weather forecasters.Fil: Otero, Federico. 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: Araneo, Diego Christian. 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: Viale, Maximiliano. 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; ArgentinaCsiro Publishing2025-06-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/291907Otero, Federico; Araneo, Diego Christian; Viale, Maximiliano; Synoptic structure of severe Zonda downslope windstorms in Argentina; Csiro Publishing; Journal of Southern Hemisphere Earth Systems Science; 75; 2; 3-6-2025; 1-182206-5865CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://connectsci.au/es/article/75/2/ES24030/200579/Synoptic-structure-of-severe-Zonda-downslopeinfo:eu-repo/semantics/altIdentifier/doi/10.1071/ES24030info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-08-25T15:06:22Zoai:ri.conicet.gov.ar:11336/291907instacron: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:34982026-08-25 15:06:22.337CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Synoptic structure of severe Zonda downslope windstorms in Argentina
title Synoptic structure of severe Zonda downslope windstorms in Argentina
spellingShingle Synoptic structure of severe Zonda downslope windstorms in Argentina
Otero, Federico
Andes Argentina
Atmospheric dynamics
Pressure systems
Severe foehn
Standarised anomalies
Synoptic circulation
Zonda wind
title_short Synoptic structure of severe Zonda downslope windstorms in Argentina
title_full Synoptic structure of severe Zonda downslope windstorms in Argentina
title_fullStr Synoptic structure of severe Zonda downslope windstorms in Argentina
title_full_unstemmed Synoptic structure of severe Zonda downslope windstorms in Argentina
title_sort Synoptic structure of severe Zonda downslope windstorms in Argentina
dc.creator.none.fl_str_mv Otero, Federico
Araneo, Diego Christian
Viale, Maximiliano
author Otero, Federico
author_facet Otero, Federico
Araneo, Diego Christian
Viale, Maximiliano
author_role author
author2 Araneo, Diego Christian
Viale, Maximiliano
author2_role author
author
dc.subject.none.fl_str_mv Andes Argentina
Atmospheric dynamics
Pressure systems
Severe foehn
Standarised anomalies
Synoptic circulation
Zonda wind
topic Andes Argentina
Atmospheric dynamics
Pressure systems
Severe foehn
Standarised anomalies
Synoptic circulation
Zonda wind
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 wind is a characteristic Argentinian downslope windstorm that occurs on the eastern slopes of the Andes Mountains, creating extremely windy, warm and dry conditions with substantial socioeconomic impacts. This study aims to characterise and understand the synoptic-scale atmospheric dynamics, as well as the vertical structure of the atmosphere on both sides of the Andes, associated with severe and long-duration Zonda events compared with non-severe events. Severe events are most frequent between August and October, comprising 64.8% of occurrences. These events exhibit earlier onset and later cessation, resulting in more late-night and morning Zonda hours compared with non-severe events. The synoptic structure for severe and long Zonda events is associated with a more baroclinic structure, featuring a deep trough at both low and mid-levels and shifted west with altitude. Lower levels present higher anomalies and move faster than mid-level anomalies when the wind crosses the Andes. This is accompanied by a deep trough east of the Andes with a tilted axis and a slower eastward movement. The associated upper-level dynamic shows a stronger convergence and divergence pattern on the windward and lee sides of the Andes respectively, along with a stronger, elongated and persistent jet streak. The precipitation pattern is in agreement with the more intense winds impinging on the Andes, resulting in more intense rising motions and more precipitation on the windward slopes. Analysis of the vertical structure in severe events shows a more humid windward profile, especially at low and mid-levels, with stronger winds. The leeward side presents a more unstable temperature profile, warmer at low levels and colder at upper levels, and extreme dryness between low and mid-levels, indicating the presence of the Zonda at this altitude before the event starts. Given the limited studies on Zonda downslope windstorms in South America, this research represents a major step in our understanding of these severe events and provides valuable insights for weather forecasters.
Fil: Otero, Federico. 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: Araneo, Diego Christian. 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: Viale, Maximiliano. 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
description The Zonda wind is a characteristic Argentinian downslope windstorm that occurs on the eastern slopes of the Andes Mountains, creating extremely windy, warm and dry conditions with substantial socioeconomic impacts. This study aims to characterise and understand the synoptic-scale atmospheric dynamics, as well as the vertical structure of the atmosphere on both sides of the Andes, associated with severe and long-duration Zonda events compared with non-severe events. Severe events are most frequent between August and October, comprising 64.8% of occurrences. These events exhibit earlier onset and later cessation, resulting in more late-night and morning Zonda hours compared with non-severe events. The synoptic structure for severe and long Zonda events is associated with a more baroclinic structure, featuring a deep trough at both low and mid-levels and shifted west with altitude. Lower levels present higher anomalies and move faster than mid-level anomalies when the wind crosses the Andes. This is accompanied by a deep trough east of the Andes with a tilted axis and a slower eastward movement. The associated upper-level dynamic shows a stronger convergence and divergence pattern on the windward and lee sides of the Andes respectively, along with a stronger, elongated and persistent jet streak. The precipitation pattern is in agreement with the more intense winds impinging on the Andes, resulting in more intense rising motions and more precipitation on the windward slopes. Analysis of the vertical structure in severe events shows a more humid windward profile, especially at low and mid-levels, with stronger winds. The leeward side presents a more unstable temperature profile, warmer at low levels and colder at upper levels, and extreme dryness between low and mid-levels, indicating the presence of the Zonda at this altitude before the event starts. Given the limited studies on Zonda downslope windstorms in South America, this research represents a major step in our understanding of these severe events and provides valuable insights for weather forecasters.
publishDate 2025
dc.date.none.fl_str_mv 2025-06-03
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/11336/291907
Otero, Federico; Araneo, Diego Christian; Viale, Maximiliano; Synoptic structure of severe Zonda downslope windstorms in Argentina; Csiro Publishing; Journal of Southern Hemisphere Earth Systems Science; 75; 2; 3-6-2025; 1-18
2206-5865
CONICET Digital
CONICET
url http://hdl.handle.net/11336/291907
identifier_str_mv Otero, Federico; Araneo, Diego Christian; Viale, Maximiliano; Synoptic structure of severe Zonda downslope windstorms in Argentina; Csiro Publishing; Journal of Southern Hemisphere Earth Systems Science; 75; 2; 3-6-2025; 1-18
2206-5865
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://connectsci.au/es/article/75/2/ES24030/200579/Synoptic-structure-of-severe-Zonda-downslope
info:eu-repo/semantics/altIdentifier/doi/10.1071/ES24030
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Csiro Publishing
publisher.none.fl_str_mv Csiro Publishing
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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score 13.24418

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