浙江省2013~2020年人为源氨排放清单

采用排放因子法建立了浙江省2013~2020年人为源NH₃排放清单，利用ArcGIS软件对NH₃排放量进行空间分配，并与浙江省部分城市PM_2.5组分中的NH₄⁺浓度进行对比，探究了人为源NH₃排放对NH₄⁺浓度变化的影响.结果表明，2013~2020年浙江省人为源NH₃排放量呈逐年下降趋势，2020年人为源NH₃排放量为13.5万t，较2013年下降23.1%.人为源NH₃排放以农业源为主，2013~2020年占比分布在57.2%~69.6%，其中畜禽养殖和氮肥施用NH₃排放量占比较高，且2020年排放量较2013年下降最为显著，分别为34.5%、44.1%.从空间分布来看，NH₃排放较高的地区主要分布在浙江北部和金衢盆地地区，杭州市和嘉兴市年排放量位于全省前两位.NH₃排放量较高的城市NH₄⁺浓度也较高，部分城市NH₄⁺浓度下降趋势与NH₃排放量下降趋势较为一致.

Anthropogenic ammonia emission inventories of Zhejiang Province from 2013 to 2020

The anthropogenic ammonia emission inventories of Zhejiang Province from 2013~2020 were developed by using the emission factors method,, and the spatial distribution was carried out based on the ArcGIS software. The connection between ammonia emissions and NH₄⁺ concentration in PM_2.5 components of several cities in Zhejiang Province was also researched in this study. The results showed that anthropogenic ammonia emissions in Zhejiang Province from 2013~2020 decreased year by year. The ammonia emisson in 2020 was 13.5×10⁴t, decreased by 23.1% compared with 2013. Agricultural sources were a major source of anthropogenic NH₃ emissions, which accounted for 57.2%~69.6% of the total ammonia emssions from 2013~2020. The livestock and nitrogen fertilizer application shared high proportion of agricultural NH₃emissions, and the emissions of these two sources in 2020 decreased most significantly compared to the previous years, with 34.5% and 44.1% respectively. The spatial distribution results showed that regions with higher ammonia emissios mainly distributed in the north of Zhejiang Province and Jinqu Basin. The emisisons of Hangzhou and Jiaxing ranked the top two in Zhejiang Province. Cities with higher ammonia emissions also had higher NH₄⁺ concentration, and the downtrend of NH₄⁺ concentration in some cities was consistent with that of ammonia emissions