Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot Spots

Autores
Giles, Julián Alberto; Menendez, Claudio Guillermo; Ruscica, Romina
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The land-atmosphere interactions play an important role in modulating climate variability at different spatial and temporal scales. In South America, two recognized hot spots of soil moisture-atmosphere coupling are located in southeastern South America (SESA) and eastern Brazil. Soil moisture variability may not only alter the climate locally but may also have nonlocal impacts through changes in the regional circulation. Here we explore how these two local coupling hot spots interact with each other, how soil moisture variability modulates the regional circulation, and what is the consequent nonlocal impact on precipitation. To this end, we analyze numerical experiments, performed with a regional climate model for the period October-March of 1983-2012, that allow us to isolate the influence of the soil moisture interannual variability on the regional climate. When the soil moisture-atmosphere interaction is enabled, we find a nonlocal coupling mechanism that links both hot spots at different temporal scales, favoring precipitation in eastern Brazil to the detriment of the precipitation in SESA through shifts in the regional circulation, when compared with a simulation with constrained soil moisture-atmosphere interaction. In northeastern Argentina, a subregion of SESA located at the exit of the South American low-level jet, it was found that the amount of nighttime precipitation is modulated by the proposed nonlocal coupling mechanism. A better understanding of the variability of precipitation due to the influence of land-atmosphere interaction processes may contribute to improving the predictability of precipitation and the interpretation of climate projections.
Fil: Giles, Julián Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina
Fil: Menendez, Claudio Guillermo. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina
Fil: Ruscica, Romina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina
Materia
ATMOSPHERE-LAND INTERACTION
CLIMATE VARIABILITY
NUMERICAL ANALYSIS/MODELING
REGIONAL MODELS
SOIL MOISTURE
SOUTH AMERICA
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:11336/228232
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/228232
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot SpotsGiles, Julián AlbertoMenendez, Claudio GuillermoRuscica, RominaATMOSPHERE-LAND INTERACTIONCLIMATE VARIABILITYNUMERICAL ANALYSIS/MODELINGREGIONAL MODELSSOIL MOISTURESOUTH AMERICAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The land-atmosphere interactions play an important role in modulating climate variability at different spatial and temporal scales. In South America, two recognized hot spots of soil moisture-atmosphere coupling are located in southeastern South America (SESA) and eastern Brazil. Soil moisture variability may not only alter the climate locally but may also have nonlocal impacts through changes in the regional circulation. Here we explore how these two local coupling hot spots interact with each other, how soil moisture variability modulates the regional circulation, and what is the consequent nonlocal impact on precipitation. To this end, we analyze numerical experiments, performed with a regional climate model for the period October-March of 1983-2012, that allow us to isolate the influence of the soil moisture interannual variability on the regional climate. When the soil moisture-atmosphere interaction is enabled, we find a nonlocal coupling mechanism that links both hot spots at different temporal scales, favoring precipitation in eastern Brazil to the detriment of the precipitation in SESA through shifts in the regional circulation, when compared with a simulation with constrained soil moisture-atmosphere interaction. In northeastern Argentina, a subregion of SESA located at the exit of the South American low-level jet, it was found that the amount of nighttime precipitation is modulated by the proposed nonlocal coupling mechanism. A better understanding of the variability of precipitation due to the influence of land-atmosphere interaction processes may contribute to improving the predictability of precipitation and the interpretation of climate projections.Fil: Giles, Julián Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; ArgentinaFil: Menendez, Claudio Guillermo. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; ArgentinaFil: Ruscica, Romina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; ArgentinaAmer Meteorological Soc2023-01info: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/11336/228232Giles, Julián Alberto; Menendez, Claudio Guillermo; Ruscica, Romina; Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot Spots; Amer Meteorological Soc; Journal Of Climate; 36; 1; 1-2023; 227-2420894-8755CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://journals.ametsoc.org/view/journals/clim/36/1/JCLI-D-21-0510.1.xmlinfo:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-21-0510.1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:47:26Zoai:ri.conicet.gov.ar:11336/228232instacron: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:34982025-09-03 09:47:27.186CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot Spots
title Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot Spots
spellingShingle Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot Spots
Giles, Julián Alberto
ATMOSPHERE-LAND INTERACTION
CLIMATE VARIABILITY
NUMERICAL ANALYSIS/MODELING
REGIONAL MODELS
SOIL MOISTURE
SOUTH AMERICA
title_short Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot Spots
title_full Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot Spots
title_fullStr Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot Spots
title_full_unstemmed Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot Spots
title_sort Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot Spots
dc.creator.none.fl_str_mv Giles, Julián Alberto
Menendez, Claudio Guillermo
Ruscica, Romina
author Giles, Julián Alberto
author_facet Giles, Julián Alberto
Menendez, Claudio Guillermo
Ruscica, Romina
author_role author
author2 Menendez, Claudio Guillermo
Ruscica, Romina
author2_role author
author
dc.subject.none.fl_str_mv ATMOSPHERE-LAND INTERACTION
CLIMATE VARIABILITY
NUMERICAL ANALYSIS/MODELING
REGIONAL MODELS
SOIL MOISTURE
SOUTH AMERICA
topic ATMOSPHERE-LAND INTERACTION
CLIMATE VARIABILITY
NUMERICAL ANALYSIS/MODELING
REGIONAL MODELS
SOIL MOISTURE
SOUTH AMERICA
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 land-atmosphere interactions play an important role in modulating climate variability at different spatial and temporal scales. In South America, two recognized hot spots of soil moisture-atmosphere coupling are located in southeastern South America (SESA) and eastern Brazil. Soil moisture variability may not only alter the climate locally but may also have nonlocal impacts through changes in the regional circulation. Here we explore how these two local coupling hot spots interact with each other, how soil moisture variability modulates the regional circulation, and what is the consequent nonlocal impact on precipitation. To this end, we analyze numerical experiments, performed with a regional climate model for the period October-March of 1983-2012, that allow us to isolate the influence of the soil moisture interannual variability on the regional climate. When the soil moisture-atmosphere interaction is enabled, we find a nonlocal coupling mechanism that links both hot spots at different temporal scales, favoring precipitation in eastern Brazil to the detriment of the precipitation in SESA through shifts in the regional circulation, when compared with a simulation with constrained soil moisture-atmosphere interaction. In northeastern Argentina, a subregion of SESA located at the exit of the South American low-level jet, it was found that the amount of nighttime precipitation is modulated by the proposed nonlocal coupling mechanism. A better understanding of the variability of precipitation due to the influence of land-atmosphere interaction processes may contribute to improving the predictability of precipitation and the interpretation of climate projections.
Fil: Giles, Julián Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina
Fil: Menendez, Claudio Guillermo. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina
Fil: Ruscica, Romina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina
description The land-atmosphere interactions play an important role in modulating climate variability at different spatial and temporal scales. In South America, two recognized hot spots of soil moisture-atmosphere coupling are located in southeastern South America (SESA) and eastern Brazil. Soil moisture variability may not only alter the climate locally but may also have nonlocal impacts through changes in the regional circulation. Here we explore how these two local coupling hot spots interact with each other, how soil moisture variability modulates the regional circulation, and what is the consequent nonlocal impact on precipitation. To this end, we analyze numerical experiments, performed with a regional climate model for the period October-March of 1983-2012, that allow us to isolate the influence of the soil moisture interannual variability on the regional climate. When the soil moisture-atmosphere interaction is enabled, we find a nonlocal coupling mechanism that links both hot spots at different temporal scales, favoring precipitation in eastern Brazil to the detriment of the precipitation in SESA through shifts in the regional circulation, when compared with a simulation with constrained soil moisture-atmosphere interaction. In northeastern Argentina, a subregion of SESA located at the exit of the South American low-level jet, it was found that the amount of nighttime precipitation is modulated by the proposed nonlocal coupling mechanism. A better understanding of the variability of precipitation due to the influence of land-atmosphere interaction processes may contribute to improving the predictability of precipitation and the interpretation of climate projections.
publishDate 2023
dc.date.none.fl_str_mv 2023-01
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/11336/228232
Giles, Julián Alberto; Menendez, Claudio Guillermo; Ruscica, Romina; Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot Spots; Amer Meteorological Soc; Journal Of Climate; 36; 1; 1-2023; 227-242
0894-8755
CONICET Digital
CONICET
url http://hdl.handle.net/11336/228232
identifier_str_mv Giles, Julián Alberto; Menendez, Claudio Guillermo; Ruscica, Romina; Nonlocal Impacts of Soil Moisture Variability in South America: Linking Two Land-Atmosphere Coupling Hot Spots; Amer Meteorological Soc; Journal Of Climate; 36; 1; 1-2023; 227-242
0894-8755
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/view/journals/clim/36/1/JCLI-D-21-0510.1.xml
info:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-21-0510.1
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 Amer Meteorological Soc
publisher.none.fl_str_mv Amer Meteorological Soc
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 13.13397

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