Estimation of Chinese Inventories for Historical NMVOCs Emissions from Combustion

Based on time-varying statistical data and emission factors, multiyear NMVOCs emission inventories from fossil fuel combustion, biofuel burning, and biomass open burning in China for 1980-2005 were presented by a bottom-up estimate. The contributions of fossil fuel, biofuel, and open burning are estimated as 35%, 50%, and 15%, respectively, in 2005. Spatial distribution of NMVOCs emission shows that emissions are obviously uneven by regions and combustion sources. There was a monotonic growth of NMVOCs emissions from combustion at 1.91 Tg in 1980 to 5.89 Tg in 2005, with notable discrepancy among emission from different sources. NMVOCs emissions from fossil fuel combustion increased six times, from 0.34 Tg in 1980 to 2.05 Tg in 2005. Meanwhile, emissions from biofuel burning increased 1.9 times, from 1.6 Tg to 2.3 Tg during the same period. However, emissions from biomass open burning fluctuated within a range of 0.9-1.0 Tg during the decade 1995 to 2005.