Effects of land-use changes on climate in southern South America

Autores
Pessacg, Natalia Liz; Solman, Silvina Alicia
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In the last decades, the agricultural areas over La Plata Basin and the Argentinean Pampas have been extended deforestation. With the aim of understanding the potential impacts of land-use changes over the South American climate, several simulations with the regional climate model MM5 were carried out for different idealized land-use scenarios representing agricultural expansion, reforestation and desertification, respectively. Results show a significant warming and drying when forests were replaced by bare soils due to an increase in the net radiation budget and a reduction in the latent heat flux. However, the replacement of forests by crops resulted in a decrease in the net radiation budget at the surface, together with a decrease in the latent and sensible heat fluxes, leading to a significant cooling over central and eastern Argentina and drying over Bolivia and western Paraguay. Finally, the shift from the actual land cover to crops produced a cooling and wetting mainly over northern Argentina, Paraguay and part of Bolivia due to a decrease in the net radiation budget and sensible heat flux and an increase in the latent heat flux. The regional response for these idealized scenarios exceeds the area where the land-use was changed, indicating that non-local mechanisms are important. A reduction in the roughness length when forest is replaced by either crops or bare soil leads to an increase in the northerly winds, which modifies the moisture flux convergence patterns and hence affects precipitation.
Fil: Pessacg, Natalia Liz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Solman, Silvina Alicia. 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. Centre National de la Recherche Scientifique; Francia
Materia
FEEDBACKS SOIL-ATMOSPHERE
LAND USE/LAND COVER
REGIONAL CLIMATE MODEL
SOUTHERN 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:11336/54446

id CONICETDig_576eca96c47519d34350ff5a71bc339a
oai_identifier_str oai:ri.conicet.gov.ar:11336/54446
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Effects of land-use changes on climate in southern South AmericaPessacg, Natalia LizSolman, Silvina AliciaFEEDBACKS SOIL-ATMOSPHERELAND USE/LAND COVERREGIONAL CLIMATE MODELSOUTHERN SOUTH AMERICAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1In the last decades, the agricultural areas over La Plata Basin and the Argentinean Pampas have been extended deforestation. With the aim of understanding the potential impacts of land-use changes over the South American climate, several simulations with the regional climate model MM5 were carried out for different idealized land-use scenarios representing agricultural expansion, reforestation and desertification, respectively. Results show a significant warming and drying when forests were replaced by bare soils due to an increase in the net radiation budget and a reduction in the latent heat flux. However, the replacement of forests by crops resulted in a decrease in the net radiation budget at the surface, together with a decrease in the latent and sensible heat fluxes, leading to a significant cooling over central and eastern Argentina and drying over Bolivia and western Paraguay. Finally, the shift from the actual land cover to crops produced a cooling and wetting mainly over northern Argentina, Paraguay and part of Bolivia due to a decrease in the net radiation budget and sensible heat flux and an increase in the latent heat flux. The regional response for these idealized scenarios exceeds the area where the land-use was changed, indicating that non-local mechanisms are important. A reduction in the roughness length when forest is replaced by either crops or bare soil leads to an increase in the northerly winds, which modifies the moisture flux convergence patterns and hence affects precipitation.Fil: Pessacg, Natalia Liz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Solman, Silvina Alicia. 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. Centre National de la Recherche Scientifique; FranciaInter-Research2012-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/54446Pessacg, Natalia Liz; Solman, Silvina Alicia; Effects of land-use changes on climate in southern South America; Inter-Research; Climate Research; 55; 1; 11-2012; 33-510936-577X1616-1572CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.int-res.com/abstracts/cr/v55/n1/p33-51/info:eu-repo/semantics/altIdentifier/doi/10.3354/cr01119info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:38:34Zoai:ri.conicet.gov.ar:11336/54446instacron: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 09:38:34.862CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Effects of land-use changes on climate in southern South America
title Effects of land-use changes on climate in southern South America
spellingShingle Effects of land-use changes on climate in southern South America
Pessacg, Natalia Liz
FEEDBACKS SOIL-ATMOSPHERE
LAND USE/LAND COVER
REGIONAL CLIMATE MODEL
SOUTHERN SOUTH AMERICA
title_short Effects of land-use changes on climate in southern South America
title_full Effects of land-use changes on climate in southern South America
title_fullStr Effects of land-use changes on climate in southern South America
title_full_unstemmed Effects of land-use changes on climate in southern South America
title_sort Effects of land-use changes on climate in southern South America
dc.creator.none.fl_str_mv Pessacg, Natalia Liz
Solman, Silvina Alicia
author Pessacg, Natalia Liz
author_facet Pessacg, Natalia Liz
Solman, Silvina Alicia
author_role author
author2 Solman, Silvina Alicia
author2_role author
dc.subject.none.fl_str_mv FEEDBACKS SOIL-ATMOSPHERE
LAND USE/LAND COVER
REGIONAL CLIMATE MODEL
SOUTHERN SOUTH AMERICA
topic FEEDBACKS SOIL-ATMOSPHERE
LAND USE/LAND COVER
REGIONAL CLIMATE MODEL
SOUTHERN 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 In the last decades, the agricultural areas over La Plata Basin and the Argentinean Pampas have been extended deforestation. With the aim of understanding the potential impacts of land-use changes over the South American climate, several simulations with the regional climate model MM5 were carried out for different idealized land-use scenarios representing agricultural expansion, reforestation and desertification, respectively. Results show a significant warming and drying when forests were replaced by bare soils due to an increase in the net radiation budget and a reduction in the latent heat flux. However, the replacement of forests by crops resulted in a decrease in the net radiation budget at the surface, together with a decrease in the latent and sensible heat fluxes, leading to a significant cooling over central and eastern Argentina and drying over Bolivia and western Paraguay. Finally, the shift from the actual land cover to crops produced a cooling and wetting mainly over northern Argentina, Paraguay and part of Bolivia due to a decrease in the net radiation budget and sensible heat flux and an increase in the latent heat flux. The regional response for these idealized scenarios exceeds the area where the land-use was changed, indicating that non-local mechanisms are important. A reduction in the roughness length when forest is replaced by either crops or bare soil leads to an increase in the northerly winds, which modifies the moisture flux convergence patterns and hence affects precipitation.
Fil: Pessacg, Natalia Liz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Solman, Silvina Alicia. 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. Centre National de la Recherche Scientifique; Francia
description In the last decades, the agricultural areas over La Plata Basin and the Argentinean Pampas have been extended deforestation. With the aim of understanding the potential impacts of land-use changes over the South American climate, several simulations with the regional climate model MM5 were carried out for different idealized land-use scenarios representing agricultural expansion, reforestation and desertification, respectively. Results show a significant warming and drying when forests were replaced by bare soils due to an increase in the net radiation budget and a reduction in the latent heat flux. However, the replacement of forests by crops resulted in a decrease in the net radiation budget at the surface, together with a decrease in the latent and sensible heat fluxes, leading to a significant cooling over central and eastern Argentina and drying over Bolivia and western Paraguay. Finally, the shift from the actual land cover to crops produced a cooling and wetting mainly over northern Argentina, Paraguay and part of Bolivia due to a decrease in the net radiation budget and sensible heat flux and an increase in the latent heat flux. The regional response for these idealized scenarios exceeds the area where the land-use was changed, indicating that non-local mechanisms are important. A reduction in the roughness length when forest is replaced by either crops or bare soil leads to an increase in the northerly winds, which modifies the moisture flux convergence patterns and hence affects precipitation.
publishDate 2012
dc.date.none.fl_str_mv 2012-11
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/11336/54446
Pessacg, Natalia Liz; Solman, Silvina Alicia; Effects of land-use changes on climate in southern South America; Inter-Research; Climate Research; 55; 1; 11-2012; 33-51
0936-577X
1616-1572
CONICET Digital
CONICET
url http://hdl.handle.net/11336/54446
identifier_str_mv Pessacg, Natalia Liz; Solman, Silvina Alicia; Effects of land-use changes on climate in southern South America; Inter-Research; Climate Research; 55; 1; 11-2012; 33-51
0936-577X
1616-1572
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.int-res.com/abstracts/cr/v55/n1/p33-51/
info:eu-repo/semantics/altIdentifier/doi/10.3354/cr01119
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 Inter-Research
publisher.none.fl_str_mv Inter-Research
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
_version_ 1844613219241426944
score 13.070432