昆明市PM2.5和PM10质量浓度变化特征分析

Analysis on the Variation Characteristics of PM2.5 and PM10 Mass Concentration in Kunming City

    摘要
  • 摘要: 根据昆明市2017年大气污染物PM2.5和PM10的监测数据,对PM2.5和PM10浓度的变化特征和PM2.5占PM10的比重以及二者的相关性进行分析。结果表明:PM2.5和PM10质量浓度冬春季明显高于夏秋季,且PM2.5冬季的浓度最高为33. 25μg/m3,PM10春季污染物浓度最高为68. 24μg/m3; PM2.5和PM10质量浓度峰值出现在上午9∶00和凌晨1∶00,谷值出现在下午16∶00和17∶00; PM2.5/PM10比值范围在0. 436～0. 558,冬季均值最高为0. 505,表明冬季污染物中PM2.5比例高; PM2.5和PM10日均值有着非常显著的线性相关关系,相关系数方值R2为0. 853。

     

    Abstract: According to the monitoring data of atmospheric pollutants PM2.5 and PM10 in Kunming in 2017,the variation characteristics of PM2.5 and PM10 concentration and the proportion of PM2.5 and PM10 and the correlation between them were analyzed. The results showed that the mass concentrations of PM2.5 and PM10 were significantly higher in winter and spring than in summer and autumn,and the highest concentration of PM2.5 in winter was33. 25μg/m3,and the highest concentration of PM10 in spring was 68. 24μg/m3. The peak mass concentration values of PM2.5 and PM10 appeared at 9∶ 00 am and 1∶ 00 am,and the lowest values appeared at 16∶ 00 pm and 17∶ 00 pm. The ratio of PM2.5/PM10 ranges from 0. 436 to 0. 558 with the highest winter average of 0. 505,indicating that the proportion of PM2.5 in winter pollutants is high. There is a very significant linear correlation between PM2.5 and PM10 daily average,and the correlation coefficient R2 is 0. 853.

     

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