Different spatial and temporal arrangements for validating the latent heat flux obtained using the MOD16 product in a forest in the Western Amazon

The Amazon rainforest is an important source of evapotranspiration and essential in the global atmospheric circulation hydrological cycle. However, measurements on vegetated surfaces are difficult, methods such as remote sensing promising micrometeorological data area. We aimed to assess applicability MOD16 product estimate a (LEMOD) derive from Moderate Resolution Imaging Spectroradiometer sensor. For comparison, we used eddy covariance system (LEEC) tower Large-scale Biosphere-Atmosphere Program Jaru Biological Reserve. To measure linearity among variables, Pearson correlation test (α=0.05) was used, T applied statistical significance between LEMOD LEEC means (α=0.05); root mean square error also calculated. Regarding LEMOD, similarity found annual model data, which best estimates were obtained for averaging, when values 96.51 W m–2 (0.7% lower than LEEC). overestimates ranged 1.05 (1%) 2007 15.78 (18%) 2005. Variations short periods not represented by product.