Análise espaço-temporal da ocorrência de áreas queimadas no Cerrado para o período de 2005 a 2014 e sua relação com a precipitação

Forest fires, both of natural and anthropogenic origin, have an important role in regional and global ecological and climatic systems. They account for a significant portion of greenhouse gas emissions and soil degradation. Despite the high frequency and significant disturbance caused to the Cerrado biome, fire dynamics and dependence on climatic factors is still not well understood. It is necessary to study the monthly and annual variation of burned areas and their relation to precipitation. This work has estimated monthly burned areas during the period 2005 to 2014 for this biome. The estimates are from the AQM algorithm (INPE / UFRJ), while the rainfall data used are from the Tropical Rainfall Measuring Mission (TRMM). It was identified and mapped the frequency of burned areas in the Cerrado in pixels of 1 km² for the mentioned period. The Cerrado has an average annual burned area of 381.186 ± 128.845 km². There is a significant positive relationship between precipitation and burned areas, both intra and inter-annual scale. The intra-annual analysis showed that the occurrence of fires has a strong relation with the dry season, with a delay of two months. Public policies should be concentrated in the critical drought months because the months on their influence represent almost all of the fires each year.