沈阳市PM_(2.5)与O_(3)污染特征分析  

CHARACTERISTICS ANALYSIS OF PM_(2.5)AND O_(3)POLLUTION IN SHENYANG CITY

作　　者：魏相男 马云峰 包慧玉 赵慧洁 孙学斌 王帅 侯乐 WEI Xiangnan;MA Yunfeng;BAO Huiyu;ZHAO Huijie;SUN Xuebin;WANG Shuai;HOU Le(School of Energy and Environment,Shenyang Aerospace University,Shenyang 110136,China;Shenyang Ecological Environment Monitoring Center,Shenyang 110165,China)

机构地区：[1]沈阳航空航天大学能源与环境学院,沈阳110136 [2]辽宁省沈阳市生态环境监测中心,沈阳110165

出　　处：《环境工程》2024年第10期73-82,共10页Environmental Engineering

基　　金：基于虚拟现实的环境影响评价课程教学实训平台研究(XJJ2022205008);2021年辽宁省自然基金资助计划项目(2021-MS-079);2021年度沈阳市科技人才项目(RC210349)。

摘　　要：为分析PM_(2.5)与O_(3)的污染特征,利用沈阳市新冠肺炎疫情期间的国控监测站点污染物数据,结合WRF-Chem模式分别对2次污染过程的气象环境与扩散情况在中尺度区域上进行模拟分析,利用HYSPLIT软件对污染过程进行传输通道分析、潜在源区分析和浓度权重分析。结果表明:疫情3年期间,PM_(2.5)浓度一直处于下降状态,O_(3)浓度在2021年处于极低值点。PM_(2.5)与O_(3)污染随季节波动,PM_(2.5)污染呈现出明显的季节特征,秋冬季频发,且受逆温天气、高湿度、高大气稳定度、低风速等不良天气状况影响较大;而O_(3)污染受高温影响明显。沈阳市1月污染物外部传输可能主要来源于北方,而春夏季O_(3)污染外部传输主要受辽宁省南部及黄海区域影响。O_(3)浓度呈现出明显的春夏季高,秋冬季低的特征,且午间浓度高于夜晚,易受回暖高温影响等特点。高强度太阳辐射、高温天气、静稳天气等会诱发O_(3)污染。疫情期间减少人为排放有效降低了PM_(2.5)污染,但对于O_(3)污染未见明显影响。To analyze the pollution characteristics of PM_(2.5)and O_(3),the meteorological environment and diffusion of the two pollution processes were simulated and analyzed on the mesoscale region,by using the pollutant data of the national control monitoring stations in Shenyang during the COVID-19 epidemic,and combined with WRF-Chem model.HYSPLIT software was used to analyze the transmission channel,potential source area,and concentration weight of the pollution process.The results showed that PM_(2.5)concentration had been declining during the three years of the epidemic,and O_(3)concentration was at an extremely low point in 2021.PM_(2.5)pollution and O_(3)pollution fluctuates with seasons.PM_(2.5)pollution shows obvious seasonal characteristics,more frequent in autumn and winter,and is greatly affected by adverse weather conditions such as temperature inversion,high humidity,high atmospheric stability,and low wind speed.O_(3)pollution is significantly affected by high temperatures.In January,the external transport of pollutants in Shenyang mainly comes from the north,while the external transport of O_(3)pollution in spring and summer is mainly affected by the southern Liaoning Province and the Yellow Sea region.The O_(3)concentration is obviously higher in spring and summer,and lower in autumn and winter,and higher at noon than at night,which is affected by warming and high temperature.High-intensity solar radiation,high-temperature weather,and static weather can induce ozone pollution.Reducing anthropogenic emissions during the epidemic effectively reduces PM_(2.5)pollution,but has no significant impact on O_(3)pollution.

关 键 词：PM_(2.5) O_(3) WRF-Chem HYSPLIT 污染特征 

分 类 号：X513[环境科学与工程—环境工程]