2017-2018年宿迁市大气污染物主要来源分析

Analysis on the Main Sources of Air Pollutants in Suqian City from 2017 to 2018

针对宿迁市2017—2018年PM2.5、PM10、臭氧浓度超标的情况,采用LPDM模型对其大气污染来源进行追踪和轨迹来源解析,结果表明:宿迁地区省内外贡献占比基本在50%左右,2017年江苏本地贡献占比49.6%,2018年占比47.1%,省内贡献同比下降2.5个百分点;2017年宿迁本地贡献占比30.2%,2018年占比26.3%,宿迁本地贡献同比下降3.9个百分点。在江苏省内的各个城市中,对宿迁PM2.5影响较大的是徐州、淮安及南京;对宿迁PM2.5影响最大的外省是山东省和安徽省,通过对比2017和2018年年均PM2.5潜在源区贡献来源比例,2018年的气象条件使得宿迁PM2.5有了更多来自山东的传输影响,其中临沂、青岛、潍坊在冬季对宿迁颗粒物浓度的贡献相对突出。

In 2017-2018 PM2.5、PM10 and ozone in Suqian City are still above the standard.Throμgh LPDM traceabili?ty simulation,it is concluded that the contribution of the province and outside the province is basically about 50%,Ji?angsu′s local contribution accounted for 49.6%in 2017 and 47.1%in 2018,with a year-on-year drop of 2.5 percent?age points;In 2017,the local contribution of Suqian accounted for 30.2%,and in 2018,it accounted for 26.3%.The local contribution of Suqian decreased by 3.9 percentage points year on year.Among the cities in Jiangsu Province,Xuzhou,Huai′an and Nanjing have great influence on the PM2.5 of Suqian;Shandong Province and Anhui Province have the greatest impact on Suqian PM2.5,By comparing the contribution proportion of potential sources of PM2.5 in 2017 and 2018,the meteorological conditions in 2018 make Suqian PM2.5 have more transmission impact from Shandong,among which Linyi,Qingdao and Weifang have relatively prominent contribution to the concentration of particles in Suqian in winter.