镇江市秋季典型天气污染过程的PM2.5在线源解析

大气细颗粒物(PM2.5)是灰霾天气形成的主要原因,通过利用在线源解析的仪器对镇江市秋季典型天气下每类污染源实时的贡献比例的变化趋势解析,初步摸清镇江市典型天气下污染过程中颗粒物的来源.结果显示,监测期间发生的五次污染成因有所不同,但大多与机动车尾气源相关.入秋后,大气边界层高度降低,在静稳天气下,近地面排放的尾气源颗粒物极易累积集聚,造成或加剧污染的发生.此外,随着秋收季节的到来,秸秆焚烧现象有所抬头,生物质燃烧源对大气造成的影响需引起重视.

Online Monitoring of PM2.5 in Polluted Days of Zhenjiang City

Atmospheric fine particles(PM2.5)is a major cause of haze formation, By analyzing the changing trends through using the online source apportionment instruments of autumn in Zhenjiang city under the typical weather of each pollution source real-time contribution ratio, sources of particulate pollution during initial results under the typical weather in our city.The results showed that the five causes of pollution occurred during the monitoring period were different, but most of them were related to vehicle exhaust emissions.After autumn, atmospheric boundary layer height decreased, in calm weather, exhaust emission source particles near the ground easily accumulated agglomeration, cause or exacerbate the occurrence of contamination.In addition, with the arrival of the autumn harvest season, straw-burning phenomenon has risen, and the impact of biomass combustion source on the atmosphere should be paid attention to.