CAMS global biomass burning emissions based on fire radiative power (GFAS)

Emissions of atmospheric pollutants from biomass burning and vegetation fires are key drivers of the evolution of atmospheric composition, with a high degree of spatial and temporal variability, and an accurate representation of them in models is essential.
The CAMS Global Fire Assimilation System (GFAS) utilises satellite observations of fire radiative power (FRP) to provide near-real-time information on the location, relative intensity and estimated emissions from biomass burning and vegetation fires. Emissions are estimated by (i) conversion of FRP observations to the dry matter (DM) consumed by the fire, and (ii) application of emission factors to DM for different biomes, based on field and laboratory studies in the scientific literature, to estimate the emissions. Emissions estimates for 40 pyrogenic species are available from GFAS, including aerosols, reactive gases and greenhouse gases, on a regular grid with a spatial resolution of 0.1 degrees longitude by 0.1 degrees latitude.

生物质燃烧与植被火灾产生的大气污染物排放，是大气成分演化的关键驱动因子，其时空变异性极强，故而在数值模式中对这类排放进行精准表征至关重要。
哥白尼大气监测服务（Copernicus Atmosphere Monitoring Service，CAMS）全球火灾同化系统（Global Fire Assimilation System，GFAS）利用卫星观测获取的火灾辐射功率（Fire Radiative Power，FRP）数据，可为生物质燃烧与植被火灾的发生位置、相对强度及估算排放量提供近实时信息。排放量估算流程分为两步：一是将FRP观测数据转换为火灾消耗的干物质（Dry Matter，DM）量；二是基于科学文献中的野外与实验室研究结果，为不同生物群区的干物质赋予对应排放因子，进而完成排放量估算。GFAS可提供40种燃烧源排放物种的排放量估算结果，涵盖气溶胶、活性气体与温室气体，数据以空间分辨率为0.1°经度×0.1°纬度的规则网格形式发布。