Simulation of deforestation in eastern Amazonia using a high-resolution model

Detalhes bibliográficos
Autor(a) principal: Gandu, Adilson Wagner
Data de Publicação: 2004
Outros Autores: Cohen, Julia Clarinda Paiva, Souza, Jose Ricardo Santos de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
Texto Completo: http://www.repositorio.ufc.br/handle/riufc/68876
Resumo: This work evaluates the impact of deforestation on the climate of the eastern portion of the Amazon basin. This region is primarily an area of native tropical rainforest, but also contains several other natural ecosystems such as mangroves and savanna. It is the most densely populated area in Amazonia, and has been significantly affected by deforestation. In this study, numerical simulations were performed with a high spatial resolution, regional model that allows for consideration of mesoscale aspects such as topography, coastlines and large rivers. To evaluate the present situation and to predict potential future effects of deforestation on the climatic conditions of this region, two, one-year model simulations were made. In the first, ‘‘control simulation’’, an attempt was made to match the existing surface vegetation. The biophysical parameters used were derived from recent studies of similar Amazonregion ecosystems. In the second run, ‘‘deforested simulation’’, the forested-area biophysical parameters were replaced by those corresponding to the pasture areas of the region. The higher-resolution regional modelling revealed important climatic features of the deforestation process, displaying someassociatedmesoscaleeffects that are not typically represented in similar Global Circulation Model simulations. Near coastal zones and along large rivers, deforestation resulted in reduced cloud cover and precipitation. However, increased cloudcoverandprecipitation waspredictedoveruplandareas, especially onslopesfacingrivervalleys.Themodelledsurface sensible and latent heatfluxesalso presented bothpositive and negative anomalies. The magnitudes of these anomalies were greater during the dry season.Windspeednearthe surfacewas the meteorological variable that presented the most significant change due todeforestation. The reduction in roughness coeff icient resulting from the shift from forest to pasture produced increased windspeeds near the Atlantic coast. The greater windspeeds diminished local humidity convergence and consequently reduced rainfall totals in nearby regions. The results obtained from these higher-resolution simulations show that, in general, orography, coastline profile and the distribution of large rivers play important roles in determining anomaly patterns of precipitation, wind, and energy exchange associated with deforestation in eastern Amazonia.
id UFC-7_73bb32f667de667dcb473eeb95199148
oai_identifier_str oai:repositorio.ufc.br:riufc/68876
network_acronym_str UFC-7
network_name_str Repositório Institucional da Universidade Federal do Ceará (UFC)
repository_id_str
spelling Simulation of deforestation in eastern Amazonia using a high-resolution modelDeforestationClimate impactMagroveDesflorestaçãoImpacto climáticoMangueThis work evaluates the impact of deforestation on the climate of the eastern portion of the Amazon basin. This region is primarily an area of native tropical rainforest, but also contains several other natural ecosystems such as mangroves and savanna. It is the most densely populated area in Amazonia, and has been significantly affected by deforestation. In this study, numerical simulations were performed with a high spatial resolution, regional model that allows for consideration of mesoscale aspects such as topography, coastlines and large rivers. To evaluate the present situation and to predict potential future effects of deforestation on the climatic conditions of this region, two, one-year model simulations were made. In the first, ‘‘control simulation’’, an attempt was made to match the existing surface vegetation. The biophysical parameters used were derived from recent studies of similar Amazonregion ecosystems. In the second run, ‘‘deforested simulation’’, the forested-area biophysical parameters were replaced by those corresponding to the pasture areas of the region. The higher-resolution regional modelling revealed important climatic features of the deforestation process, displaying someassociatedmesoscaleeffects that are not typically represented in similar Global Circulation Model simulations. Near coastal zones and along large rivers, deforestation resulted in reduced cloud cover and precipitation. However, increased cloudcoverandprecipitation waspredictedoveruplandareas, especially onslopesfacingrivervalleys.Themodelledsurface sensible and latent heatfluxesalso presented bothpositive and negative anomalies. The magnitudes of these anomalies were greater during the dry season.Windspeednearthe surfacewas the meteorological variable that presented the most significant change due todeforestation. The reduction in roughness coeff icient resulting from the shift from forest to pasture produced increased windspeeds near the Atlantic coast. The greater windspeeds diminished local humidity convergence and consequently reduced rainfall totals in nearby regions. The results obtained from these higher-resolution simulations show that, in general, orography, coastline profile and the distribution of large rivers play important roles in determining anomaly patterns of precipitation, wind, and energy exchange associated with deforestation in eastern Amazonia.Theoretical And Applied Climatology2022-10-18T16:54:45Z2022-10-18T16:54:45Z2004info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfGANDU, A. W.; COHEN, J.C.P.; SOUZA, J. R. S. Simulation of deforestation in eastern Amazonia using a high-resolution model. Theoretical and Applied Climatology, Austria, v. 78, n.1-3, p. 123-135, 2004.0177-178Xhttp://www.repositorio.ufc.br/handle/riufc/68876Gandu, Adilson WagnerCohen, Julia Clarinda PaivaSouza, Jose Ricardo Santos deengreponame:Repositório Institucional da Universidade Federal do Ceará (UFC)instname:Universidade Federal do Ceará (UFC)instacron:UFCinfo:eu-repo/semantics/openAccess2023-01-17T12:53:14Zoai:repositorio.ufc.br:riufc/68876Repositório InstitucionalPUBhttp://www.repositorio.ufc.br/ri-oai/requestbu@ufc.br || repositorio@ufc.bropendoar:2024-09-11T18:28:33.291057Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)false
dc.title.none.fl_str_mv Simulation of deforestation in eastern Amazonia using a high-resolution model
title Simulation of deforestation in eastern Amazonia using a high-resolution model
spellingShingle Simulation of deforestation in eastern Amazonia using a high-resolution model
Gandu, Adilson Wagner
Deforestation
Climate impact
Magrove
Desflorestação
Impacto climático
Mangue
title_short Simulation of deforestation in eastern Amazonia using a high-resolution model
title_full Simulation of deforestation in eastern Amazonia using a high-resolution model
title_fullStr Simulation of deforestation in eastern Amazonia using a high-resolution model
title_full_unstemmed Simulation of deforestation in eastern Amazonia using a high-resolution model
title_sort Simulation of deforestation in eastern Amazonia using a high-resolution model
author Gandu, Adilson Wagner
author_facet Gandu, Adilson Wagner
Cohen, Julia Clarinda Paiva
Souza, Jose Ricardo Santos de
author_role author
author2 Cohen, Julia Clarinda Paiva
Souza, Jose Ricardo Santos de
author2_role author
author
dc.contributor.author.fl_str_mv Gandu, Adilson Wagner
Cohen, Julia Clarinda Paiva
Souza, Jose Ricardo Santos de
dc.subject.por.fl_str_mv Deforestation
Climate impact
Magrove
Desflorestação
Impacto climático
Mangue
topic Deforestation
Climate impact
Magrove
Desflorestação
Impacto climático
Mangue
description This work evaluates the impact of deforestation on the climate of the eastern portion of the Amazon basin. This region is primarily an area of native tropical rainforest, but also contains several other natural ecosystems such as mangroves and savanna. It is the most densely populated area in Amazonia, and has been significantly affected by deforestation. In this study, numerical simulations were performed with a high spatial resolution, regional model that allows for consideration of mesoscale aspects such as topography, coastlines and large rivers. To evaluate the present situation and to predict potential future effects of deforestation on the climatic conditions of this region, two, one-year model simulations were made. In the first, ‘‘control simulation’’, an attempt was made to match the existing surface vegetation. The biophysical parameters used were derived from recent studies of similar Amazonregion ecosystems. In the second run, ‘‘deforested simulation’’, the forested-area biophysical parameters were replaced by those corresponding to the pasture areas of the region. The higher-resolution regional modelling revealed important climatic features of the deforestation process, displaying someassociatedmesoscaleeffects that are not typically represented in similar Global Circulation Model simulations. Near coastal zones and along large rivers, deforestation resulted in reduced cloud cover and precipitation. However, increased cloudcoverandprecipitation waspredictedoveruplandareas, especially onslopesfacingrivervalleys.Themodelledsurface sensible and latent heatfluxesalso presented bothpositive and negative anomalies. The magnitudes of these anomalies were greater during the dry season.Windspeednearthe surfacewas the meteorological variable that presented the most significant change due todeforestation. The reduction in roughness coeff icient resulting from the shift from forest to pasture produced increased windspeeds near the Atlantic coast. The greater windspeeds diminished local humidity convergence and consequently reduced rainfall totals in nearby regions. The results obtained from these higher-resolution simulations show that, in general, orography, coastline profile and the distribution of large rivers play important roles in determining anomaly patterns of precipitation, wind, and energy exchange associated with deforestation in eastern Amazonia.
publishDate 2004
dc.date.none.fl_str_mv 2004
2022-10-18T16:54:45Z
2022-10-18T16:54:45Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv GANDU, A. W.; COHEN, J.C.P.; SOUZA, J. R. S. Simulation of deforestation in eastern Amazonia using a high-resolution model. Theoretical and Applied Climatology, Austria, v. 78, n.1-3, p. 123-135, 2004.
0177-178X
http://www.repositorio.ufc.br/handle/riufc/68876
identifier_str_mv GANDU, A. W.; COHEN, J.C.P.; SOUZA, J. R. S. Simulation of deforestation in eastern Amazonia using a high-resolution model. Theoretical and Applied Climatology, Austria, v. 78, n.1-3, p. 123-135, 2004.
0177-178X
url http://www.repositorio.ufc.br/handle/riufc/68876
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Theoretical And Applied Climatology
publisher.none.fl_str_mv Theoretical And Applied Climatology
dc.source.none.fl_str_mv reponame:Repositório Institucional da Universidade Federal do Ceará (UFC)
instname:Universidade Federal do Ceará (UFC)
instacron:UFC
instname_str Universidade Federal do Ceará (UFC)
instacron_str UFC
institution UFC
reponame_str Repositório Institucional da Universidade Federal do Ceará (UFC)
collection Repositório Institucional da Universidade Federal do Ceará (UFC)
repository.name.fl_str_mv Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)
repository.mail.fl_str_mv bu@ufc.br || repositorio@ufc.br
_version_ 1813028819499483136