Effects of land-use changes on climate in southern South America
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 o...
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2012
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0936577X_v55_n1_p33_Pessacg http://hdl.handle.net/20.500.12110/paper_0936577X_v55_n1_p33_Pessacg |
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paper:paper_0936577X_v55_n1_p33_Pessacg |
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dspace |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Feedbacks soil-atmosphere Land use/land cover Regional climate model Southern South America Agricultural areas Agricultural expansion Argentina Bare soils La Plata basin Land cover Land use/land cover Land-use change Land-use scenario Moisture flux convergences Net radiation Nonlocal Paraguay Potential impacts Regional climate models Regional response Roughness length Sensible heat flux South America Climate models Climatology Crops Deforestation Land use Reforestation Soils Heat flux bare soil climate change climate effect climate feedback climate modeling cooling deforestation desertification land cover land use change latent heat flux nature-society relations net radiation precipitation (climatology) regional climate sensible heat flux warming Argentina La Plata Basin Pampas |
| spellingShingle |
Feedbacks soil-atmosphere Land use/land cover Regional climate model Southern South America Agricultural areas Agricultural expansion Argentina Bare soils La Plata basin Land cover Land use/land cover Land-use change Land-use scenario Moisture flux convergences Net radiation Nonlocal Paraguay Potential impacts Regional climate models Regional response Roughness length Sensible heat flux South America Climate models Climatology Crops Deforestation Land use Reforestation Soils Heat flux bare soil climate change climate effect climate feedback climate modeling cooling deforestation desertification land cover land use change latent heat flux nature-society relations net radiation precipitation (climatology) regional climate sensible heat flux warming Argentina La Plata Basin Pampas Pessacg, Natalia Liz Solman, Silvina Alicia Effects of land-use changes on climate in southern South America |
| topic_facet |
Feedbacks soil-atmosphere Land use/land cover Regional climate model Southern South America Agricultural areas Agricultural expansion Argentina Bare soils La Plata basin Land cover Land use/land cover Land-use change Land-use scenario Moisture flux convergences Net radiation Nonlocal Paraguay Potential impacts Regional climate models Regional response Roughness length Sensible heat flux South America Climate models Climatology Crops Deforestation Land use Reforestation Soils Heat flux bare soil climate change climate effect climate feedback climate modeling cooling deforestation desertification land cover land use change latent heat flux nature-society relations net radiation precipitation (climatology) regional climate sensible heat flux warming Argentina La Plata Basin Pampas |
| 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. © Inter-Research 2012. |
| author |
Pessacg, Natalia Liz Solman, Silvina Alicia |
| author_facet |
Pessacg, Natalia Liz Solman, Silvina Alicia |
| author_sort |
Pessacg, Natalia Liz |
| title |
Effects of land-use changes on climate in 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 |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0936577X_v55_n1_p33_Pessacg http://hdl.handle.net/20.500.12110/paper_0936577X_v55_n1_p33_Pessacg |
| work_keys_str_mv |
AT pessacgnatalializ effectsoflandusechangesonclimateinsouthernsouthamerica AT solmansilvinaalicia effectsoflandusechangesonclimateinsouthernsouthamerica |
| bdutipo_str |
Repositorios |
| _version_ |
1764820565979299840 |