巴中市2018-2022年大气颗粒物污染特征分析  

Spatial and Temporal Variability of Atmospheric Particulate Matter in Bazhong City from 2018 to 2022

作　　者：李源媛 李智军 张绍斌 张翠英 汤萌 谭碧华 LI Yuanyuan;LI Zhijun;ZHANG Shaobin;ZHANG Cuiying;TANG Meng;TAN Bihua(Scichuan Bazhong Ecological and Environmental Monitoring Center,Bazhong 636000,China)

机构地区：[1]四川省巴中生态环境监测中心站,四川巴中636000

出　　处：《环境科学与技术》2024年第S2期81-86,共6页Environmental Science & Technology

基　　金：四川省级科技项目:巴中市大气细颗粒物污染特征分布与气相条件关系的研究(21002)

摘　　要：该研究依据巴中市2018-2022年环境空气自动监测数据,分析了四川省巴中市的大气环境质量、颗粒物污染的时空分布特征和变化规律。研究表明:(1)巴中市2018-2022年间大气颗粒物污染整体较为平稳,空气质量优良率达90%以上;(2)PM_(2.5)、PM_(10)浓度年变化趋势相似,整体呈现稳中有降的趋势;有极强的季节差异,均为冬季>春季>秋季>夏季的趋势;巴中市2018-2022年的首要污染物均是PM_(2.5),冬季PM_(2.5)首要污染物天数占比一直较为平稳,均在80%以上。(3)PM_(2.5)/PM_(10)年度比值不断增高说明,巴中市大气颗粒物污染主要来源于人为影响,且比值具有明显的季节和月度变化,说明巴中市颗粒物污染主要受气象条件和人类活动的影响。Based on the data of ambient air automatic quality monitoring stations in Bazhong City from 2018 to 2022,this study analyzes the characteristics of the air quality index and the spatial temporal distribution varations of air particulate matter in Bazhong City.The results showed that the annual atmospheric particulate matter pollution in Bazhong City from 2018 to 2022 was relatively stable,which showed the excellent and good rate of atmospheric environment quality higher than 90 percent.The inter-annual variability of PM_(2.5)was similar to the PM_(10),which all showed a downward trend.And the average concentration of atmospheric particulate matter decreased in the order of winter,spring,autumn and summer respectively.PM_(2.5)in winter occupied a large proportion stably,as the chief pollutant of atmosphere pollution in Bazhong City,with the proportion basically above 80%.The annual PM_(2.5)and PM_(10)ratio indicated that atmosphere particulate matter pollution come from manmade pollution mainly.There were significant seasonal and monthly variations of the ratio which showed particulate matter pollution was mainly affected by meteorological conditions and human activities.

关 键 词：大气颗粒物 时空分布特征 首要污染物 

分 类 号：X51[环境科学与工程—环境工程]