2017年—2021年太原市大气污染物浓度时空变化特征分析  

Spatial and Temporal V ariation Analysis of Air Pollution in Taiyuan from 2017 to 2021

作　　者：樊晋宇 王莉[1] 戴哲 姜婷 FAN Jinyu;WANG Li;DAI Zhe;JIANG Ting(College of Life Science,Shanxi Normal University,Taiyuan 030031,Shanxi,China)

机构地区：[1]山西师范大学生命科学学院,山西太原030031

出　　处：《山西师范大学学报（自然科学版）》2024年第3期87-95,共9页Journal of Shanxi Normal University(Natural Science Edition)

摘　　要：利用2017年—2021年太原市逐日空气质量监测数据及2021年气象站气象数据资料,采用统计学方法、克里金插值等方法研究太原市大气污染物浓度的时空变化趋势,并利用SPSS 25.0软件分析了大气中6项主要污染物与气象条件的相关性.结果表明:①2017年—2021年太原市PM_(2.5)、PM_(10)、NO_(2)、SO_(2)和CO年均质量浓度均呈下降趋势;O_(3)变化整体上呈上升趋势.从月内变化特征上来看,PM_(2.5)、PM_(10)、NO_(2)、SO_(2)和CO浓度表现为“冬高夏低”;O_(3)浓度与之相反,呈“夏高夏低”.②不同污染物的空间分布变化存在差异.PM_(10)、PM_(2.5)和SO_(2)始终呈“南高北低”.CO的空间分布格局呈“西低东高”的分布特征.NO_(2)的空间分布呈“南高北低,西低东高”.O_(3)的空间分布格局变化不大,整体上中间向四周扩散.③相关分析发现,SO_(2)、NO_(2)、PM_(10)、PM_(2.5)、CO之间均为显著正相关关系,而O_(3)与其余5类污染物均呈负相关.气温,湿度,降雨量、气压是影响污染物浓度的重要气象因素,对太原市大气污染影响较大.④WPSCF和WCWT分析表明,太原市PM_(10)的主要潜在源来自内蒙古、陕西和山西省部分区域,对太原市PM_(10)污染水平有较大的影响和贡献.Based on the daily air quality monitoring data of Taiyuan city from 2017 to 2021 and meteorologi-cal data of meteorological stations in 2021,the spatial and temporal variation trend of atmospheric pollutant con-centration in Taiyuan city was studied by using statistical methods,Kriging interpolation.SPSS 25.0 software was used to analyze the correlation between six main pollutants in the atmosphere and meteorological conditions.The results show that:①The average annual mass concentrations of PM_(2.5)、PM_(10)、NO_(2)、SO_(2) and CO in Taiyuan showed a decreasing trend from 2017 to 2021;the annual averaged concentration of zone was increasing from 2017 to 2021.In terms of monthly variations,the PM_(2.5)、PM_(10)、NO_(2)、SO_(2) and CO showed“winter high and sum-mer low”and the O_(3) showed“summer high and winter low”.②There were differences in the spatial distribution of different pollutants.The spatial distribution pattern of PM_(10)、PM_(2.5) and SO_(2) were always“south high north low”.The spatial distribution pattern of CO was“east high west low”.The spatial distribution pattern of NO_(2) was“south high north low,east high west low”.The spatial distribution pattern of O_(3)had little change,and in general,it spread from the middle to the periphery.③Correlation analysis showed that SO_(2)、NO_(2)、PM_(10)、PM_(2.5) and CO were significantly positive correlation,while O_(3) was correlated with the other five pollutants.Air temper-ature,humidity,rainfall and air pressure were significant meteorological factors affecting the concentration of pol-lutants,which had a great impact on the air pollutions in Taiyuan.④PSCF and CWT studies showed the poten-tial source areas and contributions of PM_(10) pollution were mainly distributed in Inner Mongolia,Shaanxi and the surrounding regions of Shanxi province,which had a tremendous effect and contribution to the pollution level of PM_(10) in Taiyuan.

关 键 词：太原市 大气污染物 时空变化 特征分析 

分 类 号：X51[环境科学与工程—环境工程]