冬春过渡期连云港城区PM_(2.5)排放的影响因素分析

Analysis on Infl uencing Factors of PM_(2.5)Emission in Lianyungang Urban Area During Winter Spring Transition Period

分析2022年2~3月连云港特殊减排情形下,连云港城区细颗粒物PM_(2.5)排放的影响因素,结果显示:2019~2021年连云港市城区PM_(2.5)质量浓度具有明显的季节分布特征;冬春过渡期(2、3月)PM_(2.5)污染程度最高的相对湿度区间为60%~80%;采取居家隔离、交通管控措施后,连云港市城区大气细颗粒物PM_(2.5)质量浓度对比管控前下降4.4%。

Analyzes the characteristics and influencing factors of fine particle PM_(2.5)emission under the special emission reduction situation in Lianyungang at 2022,the results show:the PM_(2.5)mass concentration in the urban area of Lianyungang has obvious seasonal distribution characteristics from 2019 to 2021;During the handover period in winter and spring(February and March),the relative humidity range with the highest PM_(2.5)pollution is 60%~80%;After epidemic control measures were taken,the PM_(2.5)mass concentration of fi ne particulate matter in the urban area of Lianyungang decreased by 4.4%.