The combustion conversion coefficient for constructing open biomass fire burning emission based on satellite FRE

The pollutant emissions from biomass fire burning significantly impact on global climate change, regional air quality and detrimental effects on human health. It is necessary to convert fire radiant energy (FRE) to biomass fire burning consumption by the combustion conversion coefficient, when adopting the satellite FRE to estimate the emission of  open fire burning. To date, the combustion conversion coefficients are considered to be scalar constants, which ignores the influence of multiple factors during the combustion process and regional differences. This study aims to conduct a systematic analysis of combustion conversion coefficients, by the view of ground experiment measurement, satellite data verification and emission results improvement. Firstly, the combustion conversion coefficients of typical biomass sources in China are obtained and the effects of fuels type, combustion state, combustion scale and combustion temperature on the combustion conversion coefficient are revealed, based on the ground experiment. Then, the satellite data are used to estimate the regional combustion conversion coefficient, so as to verify the reliability of the ground experimental measurement results on the regional scale. Finally, the verified combustion conversion coefficients are applied to improve the accuracy of the emission inventory. The uncertainty of the emission inventory caused by the combustion conversion coefficient has been estimated. The research results provide a new parametric scheme for improving the accuracy of the open biomass fire burning emission in China.