The Use of Fire Radiative Power to Estimate the Biomass Consumption Coefficient for Temperate Grasslands in the Atlantic Forest Biome

Abstract Every year, many active fire spots are identified in the satellite images of the southern Brazilian grasslands in the Atlantic Forest biome and Pampa biome. Fire Radiative Power (FRP) is a technique that uses remotely sensed data to quantify burned biomass. FRP measures the radiant energy released per time unit by burning vegetation. This study aims to use satellite and field data to estimate the biomass consumption rate and the biomass consumption coefficient for the southern Brazilian grasslands. Three fire points were identified in satellite FRP products. These data were combined with field data, collected through literature review, to calculate the biomass consumption coefficient. The type of vegetation is an important variable in the estimation of the biomass consumption coefficient. The biomass consumption rate was estimated to be 2.237 kg s-1 for the southern Brazilian grasslands in Atlantic Forest biome, and the biomass consumption coefficient was estimated to be 0.242 kg MJ-1.摘要 每年，在巴西南部大西洋森林生物群系与潘帕斯生物群系的草原地带的卫星影像中，均可识别出多处活跃火点。火辐射功率（Fire Radiative Power, FRP）是一种借助遥感数据量化燃烧生物量的技术，其可测量单位时间内燃烧植被释放的辐射能量。本研究旨在结合卫星与实地观测数据，估算巴西南部草原的生物量消耗速率与生物量消耗系数。研究从卫星FRP产品中选取三处火点数据，并结合通过文献调研获取的实地观测数据，计算得到生物量消耗系数。植被类型是估算生物量消耗系数的关键影响变量。经估算，巴西南部大西洋森林生物群系草原的生物量消耗速率为2.237 kg·s⁻¹，生物量消耗系数为0.242 kg·MJ⁻¹。