Land use and land cover map of a semiarid region of Brazil for meteorological and climatic models
An updated vegetation cover and land use map over a semiarid region of Brazil has been produced at a 1 km spatial resolution, using satellite data and remote sensing techniques, for application in climate modeling. The map presents the location and distribution of major vegetation types and non-vege...
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Published in: | Revista Brasileira de Meteorologia Vol. 28; no. 2; pp. 129 - 138 |
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01-06-2013
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Abstract | An updated vegetation cover and land use map over a semiarid region of Brazil has been produced at a 1 km spatial resolution, using satellite data and remote sensing techniques, for application in climate modeling. The map presents the location and distribution of major vegetation types and non-vegetated land surface formations for the Northeast Brazil Region, which includes the semiarid region. In this study, Radambrasil and IBGE vegetation maps, a digital mosaic of ETM+ Landsat 7, and TM Landsat 5 images from the period 1999-2000 were used. To update the map, the techniques of segmentation and unsupervised classification (ISOSEG) were applied. A total of 7 land cover and land use categories were mapped according to the "Simplified Simple Biosphere"(SSiB) model legend. This map shows that there has been a considerable increase in agricultural activities and pasture area. The vegetation in this region is an intricate combination of different life forms (e.g., trees and shrubs forming a closed cover) in this region. The semiarid region of Brazil is susceptible to desertification due to climatic and environmental conditions. This updated map should provide important input for regional stratification in climate studies.
Através da utilização de imagens digitais e técnicas de sensoriamento remoto, foi produzido um mapa de uso e cobertura da terra da região do semiárido do Brasil para aplicação em modelagem climática. O mapa apresenta a localização e distribuição dos principais tipos de vegetação e de formações não vegetacionais da superfície da terra para a região Nordeste do Brasil. Neste estudo foram utilizadas mapas de vegetação do Radambrasil e IBGE, mosaico digital de imagens Landsat 7 ETM+ e Landsat 5 TM do período de 1999-2000. Para atualizar o mapa foram aplicadas técnicas de segmentação e classificação não supervisionada (ISOSEG). Foram mapeadas um total de sete classes de uso e cobertura da terra, que foram compatibilizadas com a legenda do modelo de superfície "Simplified Simple Biosphere - SSiB" para o uso em modelos climáticos e meteorológicos. A vegetação nesta região é caracterizada por diversos padrões morfológicos, que dependem da localização geográfica e das condições climáticas. Os resultados obtidos pelo mapeamento indicam um aumento considerável nas atividades agrícolas e nas pastagens, e consequentemente, a redução da vegetação natural. Considerando que a região é susceptível a desertificação, devido as suas condições climáticas e ambientais, o mapa atualizado é de extrema importância para estudos que envolvam os impactos das mudanças dos usos e cobertura da terra no clima. |
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AbstractList | An updated vegetation cover and land use map over a semiarid region of Brazil has been produced at a 1 km spatial resolution, using satellite data and remote sensing techniques, for application in climate modeling. The map presents the location and distribution of major vegetation types and non-vegetated land surface formations for the Northeast Brazil Region, which includes the semiarid region. In this study, Radambrasil and IBGE vegetation maps, a digital mosaic of ETM+ Landsat 7, and TM Landsat 5 images from the period 1999-2000 were used. To update the map, the techniques of segmentation and unsupervised classification (ISOSEG) were applied. A total of 7 land cover and land use categories were mapped according to the "Simplified Simple Biosphere"(SSiB) model legend. This map shows that there has been a considerable increase in agricultural activities and pasture area. The vegetation in this region is an intricate combination of different life forms (e.g., trees and shrubs forming a closed cover) in this region. The semiarid region of Brazil is susceptible to desertification due to climatic and environmental conditions. This updated map should provide important input for regional stratification in climate studies. An updated vegetation cover and land use map over a semiarid region of Brazil has been produced at a 1 km spatial resolution, using satellite data and remote sensing techniques, for application in climate modeling. The map presents the location and distribution of major vegetation types and non-vegetated land surface formations for the Northeast Brazil Region, which includes the semiarid region. In this study, Radambrasil and IBGE vegetation maps, a digital mosaic of ETM+ Landsat 7, and TM Landsat 5 images from the period 1999-2000 were used. To update the map, the techniques of segmentation and unsupervised classification (ISOSEG) were applied. A total of 7 land cover and land use categories were mapped according to the "Simplified Simple Biosphere"(SSiB) model legend. This map shows that there has been a considerable increase in agricultural activities and pasture area. The vegetation in this region is an intricate combination of different life forms (e.g., trees and shrubs forming a closed cover) in this region. The semiarid region of Brazil is susceptible to desertification due to climatic and environmental conditions. This updated map should provide important input for regional stratification in climate studies. Através da utilização de imagens digitais e técnicas de sensoriamento remoto, foi produzido um mapa de uso e cobertura da terra da região do semiárido do Brasil para aplicação em modelagem climática. O mapa apresenta a localização e distribuição dos principais tipos de vegetação e de formações não vegetacionais da superfície da terra para a região Nordeste do Brasil. Neste estudo foram utilizadas mapas de vegetação do Radambrasil e IBGE, mosaico digital de imagens Landsat 7 ETM+ e Landsat 5 TM do período de 1999-2000. Para atualizar o mapa foram aplicadas técnicas de segmentação e classificação não supervisionada (ISOSEG). Foram mapeadas um total de sete classes de uso e cobertura da terra, que foram compatibilizadas com a legenda do modelo de superfície "Simplified Simple Biosphere - SSiB" para o uso em modelos climáticos e meteorológicos. A vegetação nesta região é caracterizada por diversos padrões morfológicos, que dependem da localização geográfica e das condições climáticas. Os resultados obtidos pelo mapeamento indicam um aumento considerável nas atividades agrícolas e nas pastagens, e consequentemente, a redução da vegetação natural. Considerando que a região é susceptível a desertificação, devido as suas condições climáticas e ambientais, o mapa atualizado é de extrema importância para estudos que envolvam os impactos das mudanças dos usos e cobertura da terra no clima. An updated vegetation cover and land use map over a serrila rid region of Brazil has been produced at a 1 km spatial resolution, using satellite data and remote sensing techniques, for application in climate modeling. The map presents the location and distribution of major vegetation types and non-vegetated land surface formations for the Northeast Brazil Region, which includes the semiarid region. In this study, Radambrasil and IBGE vegetation maps, a digital mosaic of ETM super(+) Landsat 7, and TM Landsat 5 images from the period 1999-2000 were used. To update the map, the techniques of segmentation and unsupervised classification (ISOSEG) were applied. A total of 7 land cover and land use categories were mapped according to the "Simplified Simple Biosphere"(SSiB) model legend. This map shows that there has been a considerable increase in agricultural activities and pasture area. The vegetation in this region is an intricate combination of different life forms (e.g., trees and shrubs forming a closed cover) in this region. The semiarid region of Brazil is susceptible to desertification due to climatic and environmental conditions. This updated map should provide important input for regional stratification in climate studies. |
Author | Sestini, Marcelo Francisco Carvalho, Vitor Celso Ferraz Neto, Sebastião Cunha, Ana Paula Martins do Amaral Alvalá, Regina Célia dos Santos Vieira, Rita Marcia da Silva Pinto |
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Cites_doi | 10.1029/1999GB900046 10.1007/s00704-010-0302-y 10.1175/1520-0469(1986)043<0505:ASBMFU>2.0.CO;2 10.1029/1999JD900057 10.3402/tellusa.v36i5.11649 10.1002/qj.49710343505 10.1175/1520-0469(1981)038<2653:OTDODI>2.0.CO;2 10.1175/1520-0442(1991)004<0345:ASBMFG>2.0.CO;2 10.1175/1520-0469(1978)035<2222:OMOTCA>2.0.CO;2 10.1002/joc.3370050202 10.1080/014311600210209 10.1175/1520-0442(2001)014<1809:MTIOLS>2.0.CO;2 10.1111/j.1529-8817.2003.00774.x 10.1029/95JD02754 10.1590/1809-43922000302318 10.1175/JCLI4185.1 10.1029/92JD02646 10.1590/S0001-37652008000200017 10.1175/1520-0493(1979)107<1140:FIONB>2.0.CO;2 10.1175/1520-0442(1993)006<2232:TIOLSP>2.0.CO;2 10.1175/JCLI4054.1 10.1890/1051-0761(1997)007[0022:IOUVMO]2.0.CO;2 10.1175/1520-0450(1989)028<0833:AGCOAR>2.0.CO;2 10.1080/014311600210137 10.1007/BF02915501 10.1175/1520-0450(1983)022<0474:GVALUN>2.0.CO;2 10.1016/0034-4257(94)00071-T 10.1175/1520-0442(1990)003<0893:PONBRA>2.0.CO;2 10.1175/1520-0442(2002)015<3615:TIOLUC>2.0.CO;2 |
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Snippet | An updated vegetation cover and land use map over a semiarid region of Brazil has been produced at a 1 km spatial resolution, using satellite data and remote... An updated vegetation cover and land use map over a serrila rid region of Brazil has been produced at a 1 km spatial resolution, using satellite data and... |
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SubjectTerms | Modelos biofísicos Mudança de uso da terra Semiárido Sensoriamento Remoto |
Title | Land use and land cover map of a semiarid region of Brazil for meteorological and climatic models |
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