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	Provedor de dados Bragantia (2) Scientia Agricola (1) Autor Fontana,Denise Cybis (3) Schirmbeck,Juliano (3) Schirmbeck,Lucimara Wolfarth (2) Roberti,Débora Regina (1) Palavra-chave Water status (2) Eddy covariance (1) Latent heat flux (1) MODIS images (1) NDVI (1) Parameterization (1) Satellite imagery (1) Soybean (1) Surface temperature (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2018 (2) 2017 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Two approaches to calculate TVDI in humid subtropical climate of southern Brazil Scientia Agricola Schirmbeck,Lucimara Wolfarth; Fontana,Denise Cybis; Schirmbeck,Juliano. ABSTRACT: Soybean crops occupy most areas in Rio Grande do Sul State and are highly dependent on rainfall since most of them are non-irrigated. Rainfall during the harvest period is often insufficient to meet the water demand, making water indicators an important tool for the crops. This study compared two approaches in the parameterization process of TVDI (Temperature-Vegetation Dryness Index) in a subtropical climate region of Brazil. The process used Moderate Resolution Imaging Spectroradiometer (MODIS) images of the surface temperature (TS) and Normalized Difference Vegetation Index (NDVI), with spatial resolutions of 1,000 m and periods of 8-16 d, respectively. The evaporative triangles for the TS/NDVI scatter plots were built either for each image... Tipo: Info:eu-repo/semantics/article Palavras-chave: Parameterization; Soybean; Water status; Satellite imagery. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000200111 TVDI spatiotemporal pattern of a soybean growing area in humid subtropical climate Bragantia Schirmbeck,Lucimara Wolfarth; Fontana,Denise Cybis; Schirmbeck,Juliano. ABSTRACT The most southern Brazilian state, Rio Grande do Sul, is characterized by high crop yield and is, currently, the third leading soybean producer in the country. Therefore, agriculture is very important to the economy of the region. Because agriculture is highly dependent on variable weather parameters, the present study aimed to test the Temperature-Vegetation Dryness Index (TVDI) as a regional indicator of water status under the climate and soybean crop management conditions that predominate in northwestern Rio Grande do Sul. For this, soybean crop seasons with contrasting yields were selected: 2004 – 2005 (yield 0.5 t∙ha–1) and 2009 – 2010 (2.7 t∙ha–1). TVDI was obtained from the surface temperature (TS) and Normalized Difference Vegetation Index... Tipo: Info:eu-repo/semantics/article Palavras-chave: Water status; NDVI; Surface temperature. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000300447 Evaluation of OSEB and SEBAL models for energy balance of a crop area in a humid subtropical climate Bragantia Schirmbeck,Juliano; Fontana,Denise Cybis; Roberti,Débora Regina. ABSTRACT This study evaluated the adequacy of the One-Source Energy Balance (OSEB) and Surface Energy Balance Algorithm for Land (SEBAL) models to estimate evapotranspiration in grain growing areas with humid subtropical climate in Rio Grande do Sul, southern Brazil. The dataset was obtained from a micrometeorological station (Eddy Covariance) and MODIS (Moderate Resolution Imaging Spectroradiometer) products during 84 observation days between 2009 and 2011. The OSEB and SEBAL models were used to estimate the partition of net radiation (Rn) into the components latent heat flux (LE), sensible heat flux (H), and ground heat flux (G) estimated from the MODIS images while the experimental data measured in situ were used to compare the results. Analyses... Tipo: Info:eu-repo/semantics/article Palavras-chave: Latent heat flux; Eddy covariance; MODIS images. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000400609 Registros recuperados: 3 Primeira ... 1 ... Última

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