潍坊城区典型区域PM_(10)和PM_(2.5)质量浓度变化特征

Characteristics of Mass Concentration of PM_(10) and PM_(2.5) in the Typical Urban Area in Weifang

利用2016年1月至12月潍坊城区典型区域的PM_(10)、PM_(2.5)浓度的连续观测数据,研究了PM_(10)、PM_(2.5)浓度的变化特征及其与气象因素的关系。结果表明,潍坊城区颗粒物污染较为严重,PM_(10)超标率为7.59%、PM_(2.5)超标率为33.61%。PM_(10)和PM_(2.5)质量浓度均存在明显的季节变化和月变化规律,表现为夏季月份较低,而冬季月份较高。PM_(2.5)/PM_(10)比值的平均值为0.526,该比值也呈现一定季节变化,冬夏两季较高,春秋两季较低。PM_(10)和PM_(2.5)与气温均呈现一定的负相关性,PM_(10)还与湿度呈现负相关关系。

Concentrations of PM 10 and PM 2.5 in urban Weifang from Jan.to Dec in 2016 were utilized to investigate the relationship between concentration variation and meteorological factors.Results showed that urban Weifang was highly polluted with particulate matter,with excessive rate of PM 10 to be 27.59%and excessive rate of PM 2.5 to be 33.61%.Both PM 10 and PM 2.5 exhibited obvious seasonal and monthly differences in concentrations,with lower concentrations in summer but higher concentrations in winter.The average value of PM 2.5/PM 10 was 0.526 and also showed seasonal variations,which was higher in winter and summer and lower in spring and autumn.PM 10 and PM 2.5 concentrations showed a certain negative correlation with temperature.What's more,PM 10 concentrations also showed a negative correlation with humidity.