Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible Causes

Autores
Pérez, Silvia; Sierra, Eduardo Mario; Momo, Fernando Roberto; Massobrio, Marcelo Juan
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Changes in annual rainfall in five sub-regions of the Argentine Pampa Region (Rolling, Central, Mesopotamian, Flooding and Southern) were examined for the period 1941 to 2010 using data from representative locations in each sub-region. Dubious series were adjusted by means of a homogeneity test and changes in mean value were evaluated using a hydrometeorological time series segmentation method. In addition, an association was sought between shifts in mean annual rainfall and changes in large-scale atmospheric pressure systems, as measured by the Atlantic Multidecadal Oscillation (AMO), the Pacific Decadal Oscillation (PDO) and the Southern Oscillation Index (SOI). The results indicate that the Western Pampas (Central and Southern) are more vulnerable to abrupt changes in average annual rainfall than the Eastern Pampas (Mesopotamian, Rolling and Flooding). Their vulnerability is further increased by their having the lowest average rainfall. The AMO showed significant negative correlations with all sub-regions, while the PDO and SOI showed significant positive and negative correlations respectively with the Central, Flooding and Southern Pampa. The fact that the PDO and AMO are going through the phases of their cycles that tend to reduce rainfall in much of the Pampas helps explain the lower rainfall recorded in the Western Pampas sub-regions in recent years. This has had a significant impact on agriculture and the environment.
Fil: Pérez, Silvia. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Recursos Naturales y Ambiente. Cátedra de Climatología y Fenologías Agrícolas; Argentina
Fil: Sierra, Eduardo Mario. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Recursos Naturales y Ambiente. Cátedra de Climatología y Fenologías Agrícolas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Momo, Fernando Roberto. Universidad Nacional de General Sarmiento. Instituto de Ciencias; Argentina
Fil: Massobrio, Marcelo Juan. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Recursos Naturales y Ambiente. Cátedra de Climatología y Fenologías Agrícolas; Argentina
Materia
Agro-climatology
Variability
Segmentation of hydrometeorological time series
Teleconnections
Climate indices
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:11336/44208
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible CausesPérez, SilviaSierra, Eduardo MarioMomo, Fernando RobertoMassobrio, Marcelo JuanAgro-climatologyVariabilitySegmentation of hydrometeorological time seriesTeleconnectionsClimate indiceshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Changes in annual rainfall in five sub-regions of the Argentine Pampa Region (Rolling, Central, Mesopotamian, Flooding and Southern) were examined for the period 1941 to 2010 using data from representative locations in each sub-region. Dubious series were adjusted by means of a homogeneity test and changes in mean value were evaluated using a hydrometeorological time series segmentation method. In addition, an association was sought between shifts in mean annual rainfall and changes in large-scale atmospheric pressure systems, as measured by the Atlantic Multidecadal Oscillation (AMO), the Pacific Decadal Oscillation (PDO) and the Southern Oscillation Index (SOI). The results indicate that the Western Pampas (Central and Southern) are more vulnerable to abrupt changes in average annual rainfall than the Eastern Pampas (Mesopotamian, Rolling and Flooding). Their vulnerability is further increased by their having the lowest average rainfall. The AMO showed significant negative correlations with all sub-regions, while the PDO and SOI showed significant positive and negative correlations respectively with the Central, Flooding and Southern Pampa. The fact that the PDO and AMO are going through the phases of their cycles that tend to reduce rainfall in much of the Pampas helps explain the lower rainfall recorded in the Western Pampas sub-regions in recent years. This has had a significant impact on agriculture and the environment.Fil: Pérez, Silvia. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Recursos Naturales y Ambiente. Cátedra de Climatología y Fenologías Agrícolas; ArgentinaFil: Sierra, Eduardo Mario. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Recursos Naturales y Ambiente. Cátedra de Climatología y Fenologías Agrícolas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Momo, Fernando Roberto. Universidad Nacional de General Sarmiento. Instituto de Ciencias; ArgentinaFil: Massobrio, Marcelo Juan. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Recursos Naturales y Ambiente. Cátedra de Climatología y Fenologías Agrícolas; ArgentinaMDPI2015-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/44208Pérez, Silvia; Sierra, Eduardo Mario; Momo, Fernando Roberto; Massobrio, Marcelo Juan; Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible Causes; MDPI; Climate; 3; 1; 1-2015; 150-1672225-1154CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.mdpi.com/2225-1154/3/1/150info:eu-repo/semantics/altIdentifier/doi/10.3390/cli3010150info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:21:20Zoai:ri.conicet.gov.ar:11336/44208instacron: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 14:21:21.267CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible Causes
title Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible Causes
spellingShingle Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible Causes
Pérez, Silvia
Agro-climatology
Variability
Segmentation of hydrometeorological time series
Teleconnections
Climate indices
title_short Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible Causes
title_full Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible Causes
title_fullStr Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible Causes
title_full_unstemmed Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible Causes
title_sort Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible Causes
dc.creator.none.fl_str_mv Pérez, Silvia
Sierra, Eduardo Mario
Momo, Fernando Roberto
Massobrio, Marcelo Juan
author Pérez, Silvia
author_facet Pérez, Silvia
Sierra, Eduardo Mario
Momo, Fernando Roberto
Massobrio, Marcelo Juan
author_role author
author2 Sierra, Eduardo Mario
Momo, Fernando Roberto
Massobrio, Marcelo Juan
author2_role author
author
author
dc.subject.none.fl_str_mv Agro-climatology
Variability
Segmentation of hydrometeorological time series
Teleconnections
Climate indices
topic Agro-climatology
Variability
Segmentation of hydrometeorological time series
Teleconnections
Climate indices
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Changes in annual rainfall in five sub-regions of the Argentine Pampa Region (Rolling, Central, Mesopotamian, Flooding and Southern) were examined for the period 1941 to 2010 using data from representative locations in each sub-region. Dubious series were adjusted by means of a homogeneity test and changes in mean value were evaluated using a hydrometeorological time series segmentation method. In addition, an association was sought between shifts in mean annual rainfall and changes in large-scale atmospheric pressure systems, as measured by the Atlantic Multidecadal Oscillation (AMO), the Pacific Decadal Oscillation (PDO) and the Southern Oscillation Index (SOI). The results indicate that the Western Pampas (Central and Southern) are more vulnerable to abrupt changes in average annual rainfall than the Eastern Pampas (Mesopotamian, Rolling and Flooding). Their vulnerability is further increased by their having the lowest average rainfall. The AMO showed significant negative correlations with all sub-regions, while the PDO and SOI showed significant positive and negative correlations respectively with the Central, Flooding and Southern Pampa. The fact that the PDO and AMO are going through the phases of their cycles that tend to reduce rainfall in much of the Pampas helps explain the lower rainfall recorded in the Western Pampas sub-regions in recent years. This has had a significant impact on agriculture and the environment.
Fil: Pérez, Silvia. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Recursos Naturales y Ambiente. Cátedra de Climatología y Fenologías Agrícolas; Argentina
Fil: Sierra, Eduardo Mario. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Recursos Naturales y Ambiente. Cátedra de Climatología y Fenologías Agrícolas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Momo, Fernando Roberto. Universidad Nacional de General Sarmiento. Instituto de Ciencias; Argentina
Fil: Massobrio, Marcelo Juan. Universidad de Buenos Aires. Facultad de Agronomia. Departamento de Recursos Naturales y Ambiente. Cátedra de Climatología y Fenologías Agrícolas; Argentina
description Changes in annual rainfall in five sub-regions of the Argentine Pampa Region (Rolling, Central, Mesopotamian, Flooding and Southern) were examined for the period 1941 to 2010 using data from representative locations in each sub-region. Dubious series were adjusted by means of a homogeneity test and changes in mean value were evaluated using a hydrometeorological time series segmentation method. In addition, an association was sought between shifts in mean annual rainfall and changes in large-scale atmospheric pressure systems, as measured by the Atlantic Multidecadal Oscillation (AMO), the Pacific Decadal Oscillation (PDO) and the Southern Oscillation Index (SOI). The results indicate that the Western Pampas (Central and Southern) are more vulnerable to abrupt changes in average annual rainfall than the Eastern Pampas (Mesopotamian, Rolling and Flooding). Their vulnerability is further increased by their having the lowest average rainfall. The AMO showed significant negative correlations with all sub-regions, while the PDO and SOI showed significant positive and negative correlations respectively with the Central, Flooding and Southern Pampa. The fact that the PDO and AMO are going through the phases of their cycles that tend to reduce rainfall in much of the Pampas helps explain the lower rainfall recorded in the Western Pampas sub-regions in recent years. This has had a significant impact on agriculture and the environment.
publishDate 2015
dc.date.none.fl_str_mv 2015-01
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/11336/44208
Pérez, Silvia; Sierra, Eduardo Mario; Momo, Fernando Roberto; Massobrio, Marcelo Juan; Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible Causes; MDPI; Climate; 3; 1; 1-2015; 150-167
2225-1154
CONICET Digital
CONICET
url http://hdl.handle.net/11336/44208
identifier_str_mv Pérez, Silvia; Sierra, Eduardo Mario; Momo, Fernando Roberto; Massobrio, Marcelo Juan; Changes in Average Annual Precipitation in Argentina’s Pampa Region and Their Possible Causes; MDPI; Climate; 3; 1; 1-2015; 150-167
2225-1154
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.mdpi.com/2225-1154/3/1/150
info:eu-repo/semantics/altIdentifier/doi/10.3390/cli3010150
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
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
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 13.22299

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