Estimativa do Balanço de Radiação via sensoriamento remoto na Amazônia Ocidental

The changes in Amazonian landscape are determinants and able to result in significant implications in physical processes, biota and regional climate, therefore, evaluate the aspects concerning the flows on the surface in different regions of this biome is essential to understanding the possible effects of changes in land use. However, due to its vast extent, measures of surface at various points of the Amazon are hampered, requiring a tool more viable and less costly. Thus, aiming to validate a methodology for determination of microclimatic parameters and support future applications in studies of impacts of land use change in the Amazon region, this study estimated the radiation balance in a forest area located in Southwest Amazonia, through Surface Energy Balance Algorithm for Land - SEBAL which uses remote sensing techniques and some data of surface. The measurements in surface were performed by instruments installed in micrometeorological towers of Large-Scale Biosphere-Atmosphere Experiment in Amazonia - LBA Program. The determination of the errors of the data estimated by the algorithm denoted that the SEBAL determined satisfactorily the albedo, the balance of short waves and net radiation, with errors that varied from 3 to 7%. For the balance of long waves the errors were more expressive, around 30%.Pages: 1893-189