四川省2012年人为源氨排放清单及分布特征

根据收集到的各类人为氨源的活动水平数据,采用合理的估算方法和排放因子,建立了四川省2012年人为源氨排放清单,并分析了氨排放的空间分布特征.结果表明:四川省2012年人为源氨排放总量为994.8×103t,排放强度为2.12 t·km-2;畜禽养殖为最主要的排放源,分担率达62.31%,其次为氮肥施用,分担率为23.14%;生猪和牛是畜禽养殖中主要贡献者,共占畜禽排放总量的64%;成都市和达州市为氨排放量较大的城市,均占四川省排放总量的10%;空间分布特征显示排放量较大的网格主要集中在四川省东部,且多来自于城市周边区县.

A 2012-based anthropogenic ammonia emission inventory and its spatial distribution in Sichuan Province

Based on the best available activity data and emission factors, a 2012-based anthropogenic ammonia emission inventory was developed for the Sichuan Province with spatial resolution of 9 km×9 km. Results showed that the total NH₃ emission from anthropogenic sources in Sichuan Province was 994.8×10³ t, and the average ammonia emission intensity was 2.12 t·km^-2. Livestock source was the largest contributor, accounting for 62.31% of the total anthropogenic NH₃ emissions, followed by nitrogen fertilizers with a contribution of 23.14%. Hog and cow were the major contributors under the category of livestock sources, together contributing to 64% of the livestock emissions. Ammonia emissions from Chengdu and Dazhou were larger than other cities, both contributing 10% to the total NH₃ emission in Sichuan province. In term of spatial distribution, there were higher emissions in the east of Sichuan and other suburban and rural areas.