摘要
为了解上饶市PM_(2.5)季节性的变化特征及潜在来源,利用上饶市2023年1月至12月在线数据及气象数据,对PM_(2.5)季节性变化特征与其他污染物相关性及潜在源区进行了分析,结果表明,上饶市PM_(2.5)季节变化呈“V”型,春冬季明显高于夏秋季。除春季臭氧外,PM_(2.5)与其他污染物均存在不同程度的正向相关性。4个季节中PM_(2.5)高值分布在静稳天气中具有一致性,在静风下均有高值出现。后向轨迹聚类分析发现春季共有6条轨迹,秋季有4条轨迹,夏季和冬季各有5条轨迹,春、夏、冬季均有来自东北、西北和西南3个方向的气团,秋季无西北方向气团。MS-PSCF和MS-CWT分析结果趋于一致性,春季潜在源区分布最广主要分布在陕西渭南、山西运城等9地,冬季高值分布在湖北咸宁、江西九江和南昌等地。建议上饶市加强与浙江衢州、江西南昌等周边地区联防联控,春冬季节还应密切关注西北工业城市的PM_(2.5)污染情况。
To investigate the seasonal variations and potential sources of PM_(2.5)in Shangrao city,online monitoring and meteorological data from January to December 2023 were analyzed for seasonal patterns,correlations with other pollutants,and potential source areas.The results indicated that the seasonal variation of PM_(2.5)in Shangrao city followed a“Vshaped”pattern,with concentrations significantly higher in winter and spring than in summer and autumn.Except for spring ozone,PM_(2.5)exhibited varying degrees of positive correlation with other pollutants.Across the four seasons,high PM_(2.5)concentrations consistently occurred under stable meteorological conditions,particularly during calm winds.Backward trajectory clustering analysis found that there were a total of 6 trajectories in spring,4 trajectories in autumn,and 5 trajectories each in summer and winter.Air masses originated from the northeast,northwest,and southwest in spring,summer,and winter,whereas no northwest air masses were observed in autumn.The results of MS-PSCF and MS-CWT analyses were generally consistent:potential source areas were most widely distributed in spring,mainly in nine locations including Weinan(Shaanxi)and Yuncheng(Shanxi),while winter high values were concentrated in Xianning(Hubei),Jiujiang,and Nanchang(Jiangxi).It is recommended that Shangrao city strengthen joint prevention and control with surrounding areas such as Quzhou in Zhejiang and Nanchang in Jiangxi,and closely monitor the PM_(2.5)pollution situation in industrial cities in northwest China during spring and winter seasons.
作者
占杨华
鲁晖
欧阳琰
ZHAN Yanghua;LU Hui;OUYANG yan(Shangrao Guangxin Ecological Environment Monitoring Technology Center,334000,Shangrao,Jiangxi,PRC;Jiangxi Shangrao Ecological Environment Monitoring Center,334000,Shangrao,Jiangxi,PRC;Nanjing Institute of Environmental Science,Ministry of Ecology and Environment,210000,Nanjing,PRC)
出处
《江西科学》
2025年第6期1140-1148,1169,共10页
Jiangxi Science
基金
国家自然科学基金项目(42261077)。
