哈尔滨市细颗粒物质量浓度变化特征

Mass concentration characteristics of fine particulate in Harbin

为了研究哈尔滨市细颗粒物质量浓度的变化特征,对全年大气中PM_1和PM_(2.5)进行了采集和分析。分析结果显示,PM_1质量浓度逐月变化趋势呈现了两边凸中间凹的特征,8月浓度最低,4月浓度最高。PM_(2.5)质量浓度逐月变化特征与PM_1相似,表现为8月浓度最低,2月浓度最高。除6—10月,PM_(2.5)质量浓度均超过国家标准。PM_(2.5)和PM_1在日间和夜间的逐月浓度变化特征基本一致,且大部分月份均表现为日间浓度大于夜间,PM_(2.5)以10月、11月、12月、1月、2月最为明显,PM_1以2月、6月、9月、10月最为明显。PM_(2.5)和PM_1质量浓度的季节变化趋势均表现为冬季最高,夏季最低,且春季略高于秋季。

In order to study the mass concentration characteristics of fine particle, PM2.5 and PM2.5 were sampled and analyzed. The result showed that the monthly variation characteristics of PM1 were concave in the middle and convex on both sides, which reached the minimum value in August and the maximum value in April. The monthly variation characteristics of PM2.5 were same to that of PM1 , which reached the minimum value in August and the maximum value in February. The mass concentration of PM2. 5 exceeded the national standard except June, July, August, September, October of 2015. The monthly distribution of PM2.5 and PM1 was basically coincided during the day and night, which the concentration in the daytime was greater than that in the night among most months, especially PM2.5 in October, November, December, January, February and PM1 in February, June, September, October. The seasonal concentration variation of PM2.5 and PM2.5 was the highest in winter, the lowest in summer and slightly higher in spring than in autumn.