Agricultural Ammonia Emission of Wuhan City Cluster:Its Impacts on PM2.5
Ammonia is an important precursor of fine particulate matter(PM2.5),so studying its spatio-temporal variation,emission reduction potential and the impacts on PM2.5 is of considerable significance for scientifically setting ammonia control targets and formulating ammonia emission policies.In this study the spatio-temporal variation in agricultural ammonia emission in nine cities of the Wuhan City Cluster from 2010 to 2020 was analyzed.With the year 2020 being as the base year,the agricultural ammonia emissions of 2030 in each of the nine cities were estimated based on the current and planned policies,and the reduction potential of agricultural ammonia emissions in each city was also evaluated.Furthermore,according to the observation data of the components of PM2.5,combined with the thermodynamic model,the impact of agricultural ammonia on PM2.5 was evaluated.Consequently,the results obtained suggested from 2010 to 2020,the agricultural ammonia emis-sions in the Wuhan City Cluster tended an increase at first and then followed by decreases,showing an overall emission de-crease of 16.1％,with Wuhan City proper contributed 35.7％of the whole.The main driving factors of regional agriculture ammonia emission variation consisted of production efficiency,industrial adjustment and production benefits,which particu-larly contributed more than 90％to the livestock and fertilizer-application sectors in terms of ammonia emission variation,however,the effect of urbanization and total population growth on ammonia emissions changes could be ignored.It could be foreseen that in the year 2030 the reduction potential of agricultural ammonia emissions would be about 19.4％in terms of relative reduction potential of agricultural ammonia emission,and among the cities,Ezhou City had the biggest reduction po-tential in 2030,while Xiaogan City will have the largest reduction potential in terms of absolute emission reduction,account-ing for approximately half of the total emission reduction of the City Cluster;and the secondary inorganic component being the major constituent of the regional PM2.5,its contribution to PM2.5 ranged 51.1％～73.2％for each of the nine cities,and Ezhou City's PM2.5 concentration changes to ammonia emission reduction was most sensitive,however,cities such as Wu-han,Huangshi,Xiaogan,and Xianning showed rather weak PM2.5 responses to ammonia emission reduction,some of the cit-ies in this region might failed short of the PM2.5 standard.
ammonia emissionsreduction potentialPM2.5Wuhan City Cluster
万方数据
维普
