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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/54446
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CONICET Digital (CONICET) |
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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 |
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1844613219241426944 |
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13.070432 |