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• W2864492088 abstract "As análises das propriedades óticas dos aerossóis atmosféricos auxiliam no entendimento dos efeitos diretos e indiretos dessas partículas nos fluxos de energia do sistema Terra-atmosfera. Este estudo avalia a variação espaço-temporal dos valores de Profundidade Ótica de Aerossóis (AOD) sobre uma região no centro-oeste do Brasil, utilizando produtos de sensoriamento remoto (MYD08_D3.051, C005 versão 5.1, de nível 3 do MODIS), de 2010 a 2013. A análise temporal evidenciou variações sazonais da AOD 550 nm, justificadas pela ocorrência de inúmeros registros de queima de biomassa em todo o Brasil, contexto no qual se destaca o ano de 2010, cujos valores de AOD 550 nm atingiram os máximos de todo o período analisado. Com relação à variação espacial, os maiores valores de AOD 550 nm foram obtidos sobre uma região sazonalmente alagada, o Pantanal mato-grossense, que, em comparação com a Savana, região conhecida localmente como Cerrado, praticamente não apresenta registros de queimadas na estação seca. Foi aplicado o modelo de trajetória HYSPLIT para explicar as possíveis contribuições externas. Foram encontradas evidências de que a região do Pantanal é fortemente influenciada por movimentações de ar vindas do sudeste e norte do Brasil, justamente regiões com altos índices de queima de biomassa na estação seca.Palavra-chave: focos de queimadas, propriedades óticas de aerossóis, HYSPLIT. SPATIOTEMPORAL VARIABILITY OF THE OPTICAL DEPTH OF AEROSOLS IN AREAS OF THE SAVANNAH AND OF THE PANTANAL IN THE CENTRAL REGION OF BRAZIL ABSTRACT:The analyses of the optical properties of atmospheric aerosols assist in the understanding of the direct and indirect effects of these particles in the Earth-atmosphere energy system flows. This study evaluates the spatial and temporal variation of the values of the Aerosol Optical Depth (AOD) in a region in the midwest of Brazil using remote sensing products (MYD08_D3.051, C005 version 5.1, Level 3 of MODIS), between 2010 and 2013. The temporal analysis showed seasonal variations of the AOD 550 nm, that are justified by the occurrence of numerous records of biomass burning all over Brazil, especially in the year of 2010, whose AOD values reached a peak in the analyzed period. Regarding the spatial variation, the highest AOD 550 nm values were obtained in a seasonally flooded region, the Pantanal in the state of Mato Grosso, which, compared to the Savannah, presents nearly no records of fires during the dry season. The HYSPLIT trajectory model was used to explain the possible external contributions. Evidences was found that the Pantanal region is highly influenced by air movements originated from the southeast and north of Brazil were found - these are precisely regions with high levels of biomass burning during the dry season.Keywords: biomass burning, optical properties of aerosols, HYSPLIT. DOI:" @default.
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• W2864492088 date "2018-02-28" @default.
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• W2864492088 title "VARIABILIDADE ESPAÇO-TEMPORAL DA PROFUNDIDADE ÓTICA DE AEROSSÓIS EM REGIÕES DE CERRADO E PANTANAL NA REGIÃO CENTRAL DO BRASIL" @default.
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• W2864492088 doi "https://doi.org/10.31413/nativa.v6i1.5153" @default.
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