Abstract：
As ammonia is the main component of PM2.5, long time series of ammonia emission characteristics are an important basis for studying the historical causes of PM2.5 pollution. In this study, the activity data of various anthropogenic ammonia emissions from 11 cities were collected in Zhejiang. The anthropogenic ammonia emissions inventory in Zhejiang was established using emission factors, and then a 1 km×1 km spatial grid distribution was carried out using ArcGIS software. The results showed that from 2008 to 2018, the ammonia emissions from anthropogenic sources in Zhejiang exhibited a downward trend, with an average annual decline rate of approximately 3.97%. The ammonia emissions were 108.52 kt in 2018, and the emission intensity was 1.03 t·km-2, in which there was 90.02 kt from agricultural sources and 18.50 kt from non-agricultural sources. The ammonia emissions of Hangzhou, Jiaxing, and Wenzhou were higher than those of the other cities, accounting for 14.72%, 11.86%, and 11.80% of the total ammonia emissions, respectively. The spatial distribution characteristics showed that ammonia emissions were mainly distributed in the northern part of Zhejiang, showing an emission trend of \"high in the north and low in the south.\" Uncertainty analysis showed that the simulated average value of ammonia emissions was 108.37 kt, and the uncertainty range in the 95% confidence interval was -5.40%-5.60%.
摘要：
氨是PM2.5的主要成分,长时间序列的氨排放特征是研究PM2.5污染历史成因的重要依据。在这项研究中,收集了浙江省11个城市的各种人为氨排放活动数据。利用排放因子建立了浙江省人为氨排放清单，然后使用ArcGIS软件进行了1km×1km的空间网格分布。结果表明,2008-2018年,浙江省人为源氨排放量呈下降趋势,年平均降幅约为3.97%。2018年氨排放量为108.52kt,排放强度为1.03t·km-2,其中农业源90.02kt,非农业源18.50kt。杭州的氨排放量，嘉兴,温州比其他城市都高，占14.72%，11.86%，占氨气排放总量的11.80%，分别。空间分布特征表明,氨气排放主要分布在浙江北部,呈现“北高南低”的排放趋势。“不确定度分析表明，氨气排放量的模拟平均值为108.37kt，95%置信区间的不确定度范围为-5.40%-5.60%。
