2019~2021年唐山市PM_(2.5)及O_(3)污染特征分析  

Characteristics of PM_(2.5)and O_(3)Pollution in Tangshan City From 2019 to 2021

作　　者：张壹 魏扬 Zhang Yi;Wei Yang(Tangshan Institute of Environmental Planning and Science(Tangshan Ecological Environment Publicity and Education Center),Tangshan,Hebei 063000,China)

机构地区：[1]唐山市环境规划科学研究院唐山市生态环境宣传教育中心,河北唐山063000

出　　处：《绿色科技》2023年第2期81-87,共7页Journal of Green Science and Technology

摘　　要：为了解近年来唐山市大气污染特征,基于2019~2021年的空气质量数据,对唐山市PM_(2.5)及O_(3)污染规律进行了分析。结果表明:①唐山市PM_(2.5)及O_(3)年均浓度均呈现逐年下降趋势,但仍超过国家二级标准;②PM_(2.5)浓度季节分布特征表现为冬季浓度高,夏季浓度低的分布特点;O_(3)浓度则呈现夏季浓度高,冬季浓度低的特点;③PM_(2.5)小时浓度日变化呈双峰型分布,小时浓度最大值出现时段为4:00~7:00;O_(3)的24 h变化曲线呈单峰型分布,在午后15:00~16:00达到浓度峰值;④空间上,2019~2021年PM_(2.5)高值浓度主要集中于古冶区、丰润区以及滦州市;O_(3)年均浓度超标县区主要为玉田县、迁西县、遵化市以及路南区。To research the recent atmospheric pollution characteristics in Tangshan City,the pollution conditions of PM_(2.5)and O_(3)have been analyzed by using the air quality data from 2019 to 2021.The results showed that:①The annual concentrations of PM_(2.5)and O_(3)in Tangshan city showed the downward trend,but still exceeded the national secondary air quality standard;②The concentration seasonal distribution characteristics of PM_(2.5)were higher in winter and lower in summer;while the variation of O_(3)concentrations presented the opposite trend;the concentration was higher in summer and lower in winter;③The daily variation of PM_(2.5)hourly concentrations was bimodal,with the maximum value occurring from 4 to 7 AM;the 24-hour variation curve of O_(3)was unimodal,with the peak concentration at 15 and 16 PM;④Spatially,the high PM_(2.5)concentrations from 2019 to 2021 mainly concentrated in Guye,Fengrun and Luanzhou district;while the O_(3)exceeding conditions were concentrated in Yutian,Qianxi,Zunhua and Lunan district.

关 键 词：PM_(2.5)和O_(3)复合污染 污染特征 时空分布 

分 类 号：X51[环境科学与工程—环境工程]