Avaliação do produto Active Fires do VIIRS para a Amazônia e Cerrado

Brazil is the country with the highest number of fires in South America, in which fire is mainly used as a tool to pests control, to open field agricultural removaland and to land use and land cover changes (LULCC). The active fire detection by remote sensing has been widely used to study the occurrence of fires in global scale, for the identification of their spatio-temporal distribution, and also for the estimation of biomass burned. This work aims to compare the fire radiative power (FRP) products derived from Moderate Resolution Imaging Spectroradiometer (MODIS) and Visible Infrared Imaging Radiometer Suite (VIIRS) sensor for the Brazilian Amazon and Cerrado from May 11 to September 15, 2016. The MODIS and VIIRS sensors pass through the equator at the same time having a similarity between the active fire spatial distribution estimated by the products. For Amazon and Cerrado biomes the VIIRS sensor has detected a greater number of active fires and this can be attributed the 750 meters spatial resolution and the greater capacity to detect smaller fires. However, the largest number of active fire for both sensors is between 0 and 200 MW and the difference between the VIIRS and MODIS sensors to detect active fires with FRP greater than 200 MW indicates that VIIRS is efficient in the detection of small fires that release less energy. Estimates made by both sensors indicated that Amazonia was the biome that presented the largest number of fires.