Análise compararativa dos produtos MODIS ecologia para o monitoramento biofísico ambiental do bioma Cerrado
Carregando...
Data
2006
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
The Brazilian Cerrado is an extensive and complex biome, characterized by rapid and abrupt land cover changes. Due to its dimensions and physiognomic
variations, the Cerrado plays an important role regarding the water, energy, and carbon fluxes at both the regional and global scales. Therefore, the correct understanding
of the structure and ecological functioning of this biome, particularly in the temporal domain, is of great importance. With this respect, in this study we compared the
seasonal response and land cover discrimination of the major MODIS (MODerate resolution Imaging Spectroradiometer) “biophysical” indices: the normalized difference
vegetation index (NDVI), the enhanced vegetation index (EVI), the leaf area index (LAI), and the fraction of absorbed photosynthetically active radiation (fAPAR). In spite of
the fact the four indices showed similar temporal trends, the LAI showed the highest sensitivity to the seasonal variations of the natural and converted landscapes. On the
other hand, the NDVI showed the best performance regarding land cover discrimination. Our results suggest a synergistic approach concerning the MODIS biophysical
/ ecological variables for land cover assessments and environmental monitoring of the Cerrado biome.
Descrição
Palavras-chave
Parâmetros biofísicos do Cerrado, Cerrado biophysical parameters, MODIS ecologia, MOD13, MOD15
Citação
FERREIRA, Manuel Eduardo; FERREIRA, Laerte Guimarães; HUETE, Alfredo R.; ALVARADO PECCININI, Alejandro. Análise compararativa dos produtos MODIS ecologia para o monitoramento biofísico ambiental do bioma cerrado. Revista Brasileira de Geofísica, Rio de Janeiro, v. 24, n. 2, p. 251-260, 2006.