| Based on the data of biomass combustion source activity level collected in Xining City and the emission factors, emission inventories of nine air pollutants from biomass combustion sources were established in Xining City in 2018, after which the temporal and spatial distribution characteristics and uncertainties of the inventory were analyzed. The results indicated that the total emissions of CO, NOx, SO2, NH3, VOCs, PM2.5, PM10, BC, and OC from biomass combustion sources in Xining City in 2018 were 11718.34, 604.41, 167.80, 209.72, 1617.97, 2054.04, 2135.04, 281.07, and 1224.78 t, respectively. The emission contributions of CO, NOx, VOCs, PM2.5, PM10, BC, and OC from straw open burning were the highest for biomass combustion sources. Among them, the contributions of NOx, VOCs, and CO from straw open burning were 72.35%, 63.94%, and 53.18%, respectively, and the contributions of NH3 and SO2 from household biomass furnaces were the largest, 41.49% and 42.05%, respectively. The spatial distribution from biomass combustion sources was not balanced; the air pollutants were mainly concentrated in Datong County and Huangzhong District. The temporal distributions from biomass combustion sources in Xining City were relatively large in January, February, March, October, November, and December, accounting for 5%-33%. The Monte Carlo simulation results showed that, under the 95% confidence interval, the PM2.5 emissions from forest and grassland fires had the highest uncertainty, with the uncertainty ranging from -26.71%-29.78%. |
