Relações empíricas entre a estrutura da vegetação e dados do sensor TM/LANDSAT

Accioly, L. J. de O.; Pacheco, Admilson P.; Costa, T. C. e C. da; Lopes, Osvaldo F.; Oliveira, Maria Aparecida José de

doi:10.1590/s1415-43662002000300019

Cited by 27 publications

(23 citation statements)

References 8 publications

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“…Para o cálculo do Índice de Vegetação Ajustado aos Efeitos do Solo (IVAS) utilizou-se a expressão (Huete, 1988): em que L é constante, cujo valor mais freqüentemente usado é 0,5 (Accioly et al, 2002;Boegh et al, 2002;Silva et al, 2005).…”

Section: íNdices De Vegetação: Ivdn Ivas E Iafunclassified

Mapeamento do saldo de radiação com imagens Landsat 5 e modelo de elevação digital

Pace¹,

Silva²,

Silva³

et al. 2008

Rev. bras. eng. agríc. ambient.

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RESUMOO saldo de radiação é um importante componente do balanço de energia e tem grande relevância em estudos de evapotranspiração em áreas irrigadas e em bacias hidrográficas. Obteve-se, através do estudo, a estimativa do saldo de radiação à superfície terrestre, mediante imagens multiespectrais do Mapeador Mapping net radiation using Landsat 5 imagery and digital elevation model ABSTRACT Net radiation is an important component of the surface energy balance in studies of evapotranspiration of irrigated crops and in evaporation of hydrological basins. The objective of this research was to determine the surface radiation balance, by using multispectral imagery of the Thematic Mapper (Landsat 5 satellite). In this study the SEBAL (Surface Energy Balance Algorithm for Land) and DEM (Digital Elevation Model) were used in order to correct the albedo and vegetation indices under the influence of the slope aspects were used for each study area. TM (Thematic Mapper) imageries were used for two different dates (December 4, 2000 and October 4, 2001). The calculations were accomplished with and without use of the DEM. The land surface temperature and albedo values with DEM were larger than without DEM in both years, for two selected areas. Results also show that for obtaining net radiation based on imagery of the TMLandsat 5 the topographical effects of the study area must be considered.

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Section: íNdices De Vegetação: Ivdn Ivas E Iafunclassified

Mapeamento do saldo de radiação com imagens Landsat 5 e modelo de elevação digital

Pace¹,

Silva²,

Silva³

et al. 2008

Rev. bras. eng. agríc. ambient.

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“…The image processing used the equations published previously by many authors (Markham & Baker, 1987;Huete, 1988;Huete & Warrick, 1990;Bastiaanssen, 1995;Bastiaanssen, 2000;Accioly et al, 2002;Allen et al, 2002;Boegh et al, 2002;Silva et al, 2005;, including the measurements of the estimation of the temperature surface.…”

Section: Methodsmentioning

confidence: 99%

Monitoring canopy and air temperature of dominant vegetation in tropical semi-arid using bioclimatic model

Galvíncio

Pimentel²

2016

J. Env. Anal. Progr.

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A B S T R A C TTypical vegetation of arid environments consists of few dominant species highly threatened by climate change. Jurema preta (Mimosa tenuiflora (Willd.) Poiret) is one of these successful species that now is dominant in huge semi-arid areas in the world. The development of a simple bioclimatic model using climate change scenarios based on optimistic and pessimistic predictions of the Intergovernmental Panel on Climate Change (IPCC) shown as a simple tool to predict possible responses of dominant species under dry land conditions and low functional biodiversity. The simple bioclimatic model proved satisfactory in creating climate change scenarios and impacts on the canopy temperature of Jurema preta in semi-arid Brazil. The bioclimatic model was efficient to obtain spatially relevant estimations of air temperature from determinations of the surface temperature using satellite images. The model determined that the average difference of 5 o C between the air temperature and the leaf temperature for Jurema preta, and an increase of 3 o C in air temperature, promote an increase of 2 o C in leaf temperature. It leads to disturbances in important physiological mechanisms in the leaf, mainly the photosynthesis and efficient use of water.

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“…em que: p iv e p v correspondem, respectivamente, às bandas do infravermelho próximo e do vermelho; L = constante, cujo valor mais frequentemente usado é 0,5 (Accioly et al, 2002;Boegh et al, 2002 …”

Section: Saviunclassified

“…O sensoriamento remoto tem ajudado no monitoramento espaçotemporal dos recursos naturais em diversas partes do mundo de maneira eficiente e sistemática (Baldocchi & Meyers, 1998;Accioly et al, 2002;Giongo, 2008;Oliveira et al, 2010), vindo a apresentar grande auxílio também nas atividades humanas, como a agropecuária (Leitão & Oliveira, 2000;Almeida et al, 2005) e a análise de áreas urbanas (Camargo et al, 2007).…”

Section: Introductionunclassified

Serviços Ambientais gerados por matas tuteladas ao Exército Brasileiro na Região Metropolitana no Recife

Guimarães¹,

Braga²,

Oliveira³

2012

Floram

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RESUMOEste trabalho tem o objetivo de analisar a evolução dos serviços ambientais climáticos gerados por quatro fragmentos de Mata Atlântica tutelados ao Exército Brasileiro localizados na Região Metropolitana do Recife, por meio da comparação dos valores da Temperatura da Superfície (Ts) gerados a partir de imagens do satélite TM Landsat 5, em intervalos de tempo que variam de 19 a 21 anos. Antes de ficarem sob a responsabilidade do Exército, as áreas de estudo eram utilizadas para o cultivo de cana-de-açúcar e capim para pecuária. Conclui-se que as condições climáticas no interior dos fragmentos analisados melhoraram com o decorrer dos anos e que o método de comparação da Temperatura Superficial por análise do balanço de radiação mostrou-se adequado ao estudo comparativo da evolução ambiental de fragmentos de mata.Palavras-chave: serviços ambientais, mata atlântica, fragmento florestal, exército brasileiro, geoprocessamento. Environmental Services Generated by Forests Protected by the Brazilian Army Located in the Metropolitan Area of Recife ABSTRACTThe purpose of this research was to analyze the evolution of the climatic environmental services generated by four fragments of the Atlantic rainforest under the protection of the Brazilian Army, located in the metropolitan area of Recife, through the comparison of Surface Temperatures (St) and Enhanced Vegetation Index (EVI) generated as from the images captured by the TM Landsat 5 satellite in time periods ranging from 19 to 21 years. Before being under the responsibility of the Army, the areas studied were used for the growth of sugarcane and grassland for livestock. It was possible to conclude that the climatic conditions within the fragments analyzed have improved over the years, and that the Surface Temperature comparison method through the analysis of the radiation balance was considered appropriate to the comparative study of the environmental evolution of forest fragments.

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Relações empíricas entre a estrutura da vegetação e dados do sensor TM/LANDSAT

Cited by 27 publications

References 8 publications

Mapeamento do saldo de radiação com imagens Landsat 5 e modelo de elevação digital

Mapeamento do saldo de radiação com imagens Landsat 5 e modelo de elevação digital

Monitoring canopy and air temperature of dominant vegetation in tropical semi-arid using bioclimatic model

Serviços Ambientais gerados por matas tuteladas ao Exército Brasileiro na Região Metropolitana no Recife

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