合肥市黑炭气溶胶浓度分布和变化特征研究

The Concentration Distribution and Variation Characteristics of Black Carbon Aerosols in Hefei

根据合肥市黑炭气溶胶自动在线监测结果、相关污染物监测数据、气象数据,分析了合肥市城区黑炭气溶胶的浓度分布特征。结果表明,2013年6月—2014年5月黑炭浓度的年平均值为(4.88±2.99)μg/m3,总体呈现春夏季浓度较低、秋冬季浓度较高的分布。黑炭浓度日变化呈双峰型,峰值出现在早07:00和晚20:00,早间峰值受大气扩散条件和人为活动的共同影响,晚间峰值受人为活动影响较大。在与其他污染物的相关性研究中,黑炭浓度与粒径较小的颗粒物PM1质量浓度相关性最好,波长为950 nm的测量通道测得的黑碳气溶胶与元素碳的相关性最好。

An annual concentration variation characteristics analysis of Black Carbon aerosols in Hefei was carried out based on BC online monitoring data,related pollutants data and meteorological data. The results showed that the annual average BC mass concentration in Hefei was（ 4. 88 ± 2. 99） μg / m^3 from June 2013 to May 2014,BC mass concentration was lower in spring and summer; and higher in autumn and winter. The curve of diurnal variation of BC mass concentration showed two peaks,the peak appeared at 7 o＇clock and 20 o＇clock respectively,the peak occurred at morning was influenced by atmospheric diffusion and human activities,while the peak occurred at night was influenced much more by human activities. In the correlation study of BC and other air pollutants,PM1 showed better correlation with BC mass concentration,and correlation between BC measured in 950 nm wavelength and EC was high.