摘要 统计了沈阳市2017年1月1日—2019年12月31日大气监测数据,分析了2019年大气中PM2.5和PM10质量浓度的变化特征.结果表明,全年天气质量以良为主,占比58.6%,污染天气共81 d.各季节空气质量按优级占比从大到小排列依次为秋季、夏季、春季、冬季.全年PM2.5和PM10日超标率分别为12.1%和7.7%.污染天气的AQI与PM2.5、PM10日均质量浓度的相关性系数分别为0.689和0.827,PM2.5和PM10是沈阳市污染天气中的首要污染物,月均质量浓度的最大值分别出现在2月和1月,二者最小值均出现在8月.PM2.5和PM10污染呈季节性变化,冬季污染最大,夏季则相反.各季节PM2.5和PM10的质量浓度比从大到小排列依次为冬季、夏季、秋季、春季.在2017—2019年中,PM2.5年均质量浓度持续降低,PM10污染呈反复趋势,PM2.5和PM10的质量浓度比有所降低. The atmospheric monitoring data of Shenyang City from January 1,2017 to December 31,2019 were collected,and the change characteristics of the mass concentration of PM2.5and PM10in the atmosphere in 2019 were analyzed.The results show that the weather quality in 2019 was mainly good,accounting for 58.6%,and there were 81 days of polluted weather.The air quality of each season in 2019 is ranked as autumn,summer,spring,and winter in descending order of the proportion of superior grade.The annual PM2.5and PM10daily exceedance rates are 12.1%and 7.7%.The correlation coefficients between AQI of polluted weather and PM2.5and PM10are 0.689 and 0.827,they are the primary pollutants in polluted weather in Shenyang.The maximum monthly average mass concentrations of PM2.5and PM10appeared in February and January,and the minimum of both appeared in August.PM2.5and PM10pollution showed seasonal characteristics,and the winter was most affected,summer reverse.The mass concentration ratios of PM2.5and PM10in each season are arranged in order of winter,summer,autumn and spring.In 2017-2019,the annual average mass concentration of PM2.5has continued to decrease,and PM10pollution has shown a repeated trend,PM2.5/PM10has been reduced.
机构地区 沈阳大学环境学院
出处 《沈阳大学学报:自然科学版》 CAS 2021年第2期117-124,共8页 Journal of Shenyang University:Natural Science
基金 国家自然科学基金委青年科学基金资助项目(21507091).
