2005-2009年石家庄市空气质量分布特征及其与气象条件的关系

摘要

Based on the air pollution index (API) data from 2005 to 2009 in Shijiazhuang ,the temporal and spatial distribution characteristics of air quality were analyzed. The results show that the grade of air quality is usually "II" grade in Shijiazhuang,and the day numbers of light,middle and serious pollution (i. e. Ⅲ,Ⅳ and Vgrades) account for 19. 1% of the total. It indicates that atmospheric pollution is serious in Shijiazhuang. The seasonal changes of air quality are obvious. The best air quality is in summer,then in autumn and spring,and the worst is in winter. The relationship between API and meteorological factors is worked out using a correlation analysis. For the typical pollution day in Shijiazhuang, the synoptical situation can be classified into five categories and these are: two troughs and one ridge pattern,the zonal circulation pattern,one trough and one ridge pattern,mean field pattern and two troughs and two ridges pattern.%根据2005-2009年石家庄市空气污染指数实况资料，分析了近5 a石家庄市空气质量的分布特征。结果表明：石家庄市空气质量以Ⅱ级良为主，轻度污染以上日数占样本总数的19.1％，属于大气污染较为严重的城市。空气质量分布具有明显的季节变化规律，夏季最好，秋、春季次之，冬季最差。运用相关分析法分析了气象因子与空气污染指数的相关关系，归纳得出高空500hPa两槽一脊型、纬向型、一槽一脊型、均值场型和两槽两脊型是石家庄市典型的污染日天气系统型。