摘要
随着城镇化发展和汽车保有量的增加,许多区域NO_(2)排放量显著增加,NO_(2)污染对生态环境、植被作物生长、人体健康都有负面影响.为了解邯郸市NO_(2)污染时空变化规律及污染来源,取2018—2021年各区县18个监测站点数据,采用反距离权重插值法(IDW)和小波分析法,分析了邯郸市NO_(2)浓度空间分布情况及时序特征,同时利用Meteoinfo中后向轨迹分析了邯郸市NO_(2)传输路径.结果表明,邯郸市2018—2021年NO_(2)浓度呈下降趋势,受人为源排放及气象因素影响,邯郸市NO_(2)污染主要集中在秋季的10月和11月和冬季的12月和1月,期间气象特征为低温低湿低风速高压强.邯郸市NO_(2)浓度在空间上呈集聚态势,市区平均浓度高于周边县域,高浓度地区集中在邯郸市西部和中部,东南部区县浓度较低,总体呈现西北地区高东南地区低的趋势.NO_(2)浓度除了季节性变化之外,还存在长期变化趋势.全年不同季节气流聚类分析中,冬季来自西北方向的气流轨迹最多,春季和夏季气流轨迹主要来自南方和东南方向,秋季气流轨迹主要来自河北北部,除冬季外来自河北南部气流轨迹占主要贡献.
Nitrogen dioxide(NO_(2))pollution poses a serious threat to ecological environment,growth of vegetation crops and human health,due to the significant increase of NO_(2)emissions in most areas with the development of urbanization and the rapid increase in motor vehicle ownership.To understand the temporal and spatial variation and the source of NO_(2)pollution in Handan City,the NO_(2)data obtained from 18 counties in Handan City from 2018 to 2021 were analyzed.Inverse distance weighted and wavelet analysis were adopted to explore the characteristics of the spatial and temporal distribution,and backward trajectories were performed to investigate the transmission path of NO_(2).The results indicated that the concentration of NO_(2)exhibits a decreasing trend from 2018 to 2021,which is affected by the anthropogenic sources and meteorological factors.Besides,the NO_(2)pollution was mainly concentrated in October and November in autumn and December and January in winter,during which the meteorological characteristics were low temperature,low humidity,low wind speed and high pressure.As for the spatial distribution,the concentration of NO_(2)showed an agglomeration trend.The average concentration in the urban area was higher than that in the surrounding counties,the NO_(2)concentration in the western and central area is high and that in the southeast counties was low.Moreover,the transmission path of NO_(2)was investigated by backward trajectories.The results of the cluster analysis of air flow in different seasons showed that the air flow trajectory is mainly from northwest region in winter,mainly from south and southeast region in spring and summer,and the north of Hebei province in autumn,respectively.
作者
汪庆
韩俊铎
孙岩
罗景辉
孙少静
李旭力
齐天野
WANG Qing;HAN Junduo;SUN Yan;LUO Jinghui;SUN Shaojing;LI Xuli;QI Tianye(College of Energy and Environmental Engineering,Hebei Key Laboratory of Air Pollution Cause and Impact,Hebei Engineering Research Center of Sewage Treatment and Resource Utilization,Hebei University of Engineering,Handan,056038,China)
出处
《环境化学》
北大核心
2025年第1期234-242,共9页
Environmental Chemistry
基金
国家自然科学基金(42077393,52302239)
河北省大气污染成因与影响重点实验室绩效补助经费(22567628H)
河北省自然科学基金(D2023402025)
河北省高等学校科学技术研究项目(QN2023139,QN2024101)资助.
关键词
NO_(2)
时空特征
影响因素
小波分析
聚类分析
NO_(2)
spatiotemporal characteristics
influencing factors
wavelet analysis
cluster analysis
