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.

生物质燃烧与植被野火产生的大气污染物排放，是驱动大气成分演化的关键因素，其时空变异性极强，在数值模型中准确表征这类排放不可或缺。
CAMS全球火灾同化系统（CAMS Global Fire Assimilation System，GFAS）依托卫星观测的火灾辐射功率（Fire Radiative Power，FRP），可提供生物质燃烧与植被野火的发生位置、相对强度及估算排放量等近实时信息。该系统的排放量估算遵循两步流程：① 将火灾辐射功率观测值转换为火灾消耗的干物质（Dry Matter，DM）；② 基于科学文献中的野外与实验室研究成果，针对不同生物群区为干物质赋予专属排放因子，最终完成排放量估算。GFAS可输出40种燃烧源排放物种的估算结果，涵盖气溶胶、活性气体与温室气体，数据以0.1°经度×0.1°纬度的规则格网形式发布。