Relationship between daily atmospheric circulation patterns and South Atlantic Convergence Zone (SACZ) events

This study presents the daily atmospheric circulation patterns at surface and altitude related to the South Atlantic Convergence Zone (SACZ) events that occurred between 2007 and 2017. For this analysis, Principal Pattern Sequence Analysis (PPSA) and sea level pressure and geopotential height reanal...

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Detalles Bibliográficos
Autores: Escobar, Gustavo Carlos Juan, Reboita, Michelle Simões
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:México
Institución:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
Repositorio:Atmósfera
Idioma:inglés
OAI Identifier:oai:ojs.pkp.sfu.ca:article/52936
Acceso en línea:https://www.revistascca.unam.mx/atm/index.php/atm/article/view/52936
Access Level:acceso abierto
Palabra clave:synoptic variability
classification
SACZ
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spelling Relationship between daily atmospheric circulation patterns and South Atlantic Convergence Zone (SACZ) eventsEscobar, Gustavo Carlos JuanReboita, Michelle Simõessynoptic variabilityclassificationSACZThis study presents the daily atmospheric circulation patterns at surface and altitude related to the South Atlantic Convergence Zone (SACZ) events that occurred between 2007 and 2017. For this analysis, Principal Pattern Sequence Analysis (PPSA) and sea level pressure and geopotential height reanalysis were used. Four typical atmospheric circulation patterns associated with SACZ episodes were identified. Three of them are related to the propagation of a cold front toward southeastern Brazil with a post-frontal anticyclone moving over the Atlantic Ocean. The fourth pattern is associated with the presence of a cut-off low centered over the central-south region of Brazil that induces moisture transport from the Atlantic Ocean and from the Amazon basin to most of southeastern Brazil. Considering the first three patterns, they represent, respectively, a frontal wave, a classical cold front, and a slow-moving cold front. All of these patterns provide permanent northwesterly winds in the lower troposphere over southeastern Brazil from two days before the SACZ occurrence.Instituto de Ciencias de la Atmósfera y Cambio Climático, Universidad Nacional Autónoma de México2021-12-18info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlapplication/pdfhttps://www.revistascca.unam.mx/atm/index.php/atm/article/view/5293610.20937/ATM.52936Atmósfera; Vol. 35 Núm. 1 (2022); 1-25Atmósfera; Vol. 35 No. 1 (2022); 1-252395-88120187-623610.20937/ATM.35.01reponame:Atmósferainstname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICOinstacron:UNAMenghttps://www.revistascca.unam.mx/atm/index.php/atm/article/view/52936/46934https://www.revistascca.unam.mx/atm/index.php/atm/article/view/52936/46750Copyright (c) 2020 Atmósferahttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessoai:ojs.pkp.sfu.ca:article/529362024-08-16T16:52:41Z
dc.title.none.fl_str_mv Relationship between daily atmospheric circulation patterns and South Atlantic Convergence Zone (SACZ) events
title Relationship between daily atmospheric circulation patterns and South Atlantic Convergence Zone (SACZ) events
spellingShingle Relationship between daily atmospheric circulation patterns and South Atlantic Convergence Zone (SACZ) events
Escobar, Gustavo Carlos Juan
synoptic variability
classification
SACZ
title_short Relationship between daily atmospheric circulation patterns and South Atlantic Convergence Zone (SACZ) events
title_full Relationship between daily atmospheric circulation patterns and South Atlantic Convergence Zone (SACZ) events
title_fullStr Relationship between daily atmospheric circulation patterns and South Atlantic Convergence Zone (SACZ) events
title_full_unstemmed Relationship between daily atmospheric circulation patterns and South Atlantic Convergence Zone (SACZ) events
title_sort Relationship between daily atmospheric circulation patterns and South Atlantic Convergence Zone (SACZ) events
dc.creator.none.fl_str_mv Escobar, Gustavo Carlos Juan
Reboita, Michelle Simões
author Escobar, Gustavo Carlos Juan
author_facet Escobar, Gustavo Carlos Juan
Reboita, Michelle Simões
author_role author
author2 Reboita, Michelle Simões
author2_role author
dc.subject.none.fl_str_mv synoptic variability
classification
SACZ
topic synoptic variability
classification
SACZ
description This study presents the daily atmospheric circulation patterns at surface and altitude related to the South Atlantic Convergence Zone (SACZ) events that occurred between 2007 and 2017. For this analysis, Principal Pattern Sequence Analysis (PPSA) and sea level pressure and geopotential height reanalysis were used. Four typical atmospheric circulation patterns associated with SACZ episodes were identified. Three of them are related to the propagation of a cold front toward southeastern Brazil with a post-frontal anticyclone moving over the Atlantic Ocean. The fourth pattern is associated with the presence of a cut-off low centered over the central-south region of Brazil that induces moisture transport from the Atlantic Ocean and from the Amazon basin to most of southeastern Brazil. Considering the first three patterns, they represent, respectively, a frontal wave, a classical cold front, and a slow-moving cold front. All of these patterns provide permanent northwesterly winds in the lower troposphere over southeastern Brazil from two days before the SACZ occurrence.
publishDate 2021
dc.date.none.fl_str_mv 2021-12-18
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://www.revistascca.unam.mx/atm/index.php/atm/article/view/52936
10.20937/ATM.52936
url https://www.revistascca.unam.mx/atm/index.php/atm/article/view/52936
identifier_str_mv 10.20937/ATM.52936
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.revistascca.unam.mx/atm/index.php/atm/article/view/52936/46934
https://www.revistascca.unam.mx/atm/index.php/atm/article/view/52936/46750
dc.rights.none.fl_str_mv Copyright (c) 2020 Atmósfera
http://creativecommons.org/licenses/by-nc/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2020 Atmósfera
http://creativecommons.org/licenses/by-nc/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
application/pdf
dc.publisher.none.fl_str_mv Instituto de Ciencias de la Atmósfera y Cambio Climático, Universidad Nacional Autónoma de México
publisher.none.fl_str_mv Instituto de Ciencias de la Atmósfera y Cambio Climático, Universidad Nacional Autónoma de México
dc.source.none.fl_str_mv Atmósfera; Vol. 35 Núm. 1 (2022); 1-25
Atmósfera; Vol. 35 No. 1 (2022); 1-25
2395-8812
0187-6236
10.20937/ATM.35.01
reponame:Atmósfera
instname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
instacron:UNAM
instname_str UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
instacron_str UNAM
institution UNAM
reponame_str Atmósfera
collection Atmósfera
repository.name.fl_str_mv
repository.mail.fl_str_mv
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