Emissions of N2O, NH3 and NOx from fuel combustion, industrial processes and the agricultural sectors in China

Based on the methodology and default data recommended by IPCC, N2O, NH3 and NOx emissions from fuel combustion, industrial processes, field burning of agricultural residues and fertilization were estimated. Agricultural fertilization is the important contributor of N2O emission to the atmosphere. Fuel combustion, fertilizer application and animal waste were the important sources of NH3 and NOx emissions. Estimates of NH3 and NOx emissions from animal wastes were much lower when Chinese measured nitrogen excrement data were used rather than IPCC default values. The uncertainties in the estimates of N2O, NH3 and NOx emissions were also analyzed in this paper.