武汉市主城区黑碳气溶胶的时间分布规律及解析

Time Distribution and Analysis of Black Carbon Aerosol in the Main Urban Area of Wuhan City

本文利用武汉市中心城区2014年12月至2016年2月期间东湖景区、汉阳公园、沙湖公园等十个采样点的黑碳气溶胶浓度数据分析武汉市主城区黑碳气溶胶的时间分布规律,结果表明月变化特征为各个采样点呈现相同的变化趋势,秋冬季节气溶胶浓度大,春夏季节气溶胶浓度小;黑碳气溶胶浓度在秋冬季节分布差异大,在1月份达到最高值;各月黑碳气溶胶浓度的分布的空间差异大。通过讨论分析其时间差异产生的原因与天气条件密不可分,降水多和风速大,对黑碳气溶胶浓度的稀释和扩散作用强。

This paper used the black carbon aerosol concentration data of ten sampling points from December 2014 to February 2016 in Wuhan city of East Lake scenic area, Hanyang Park, Shahu Park and so on. According to the analysis of the time distribution of the black carbon aerosol in the main urban area of Wuhan city, the results indicated the change of monthly variation characteristics of each sampling point showed the same trend. In autumn and winter the black carbon aerosol concentration is large, and in spring and summer aerosol concentration is small. The black carbon aerosol concentration has large difference of distribution in autumn and winter, reached the highest value in January. Each month the distribution of black carbon aerosol concentration have large difference of space. Through the discussion and analysis, the reasons for the time differences are closely connected with the weather conditions, precipitation and wind speed, which have strong effect on the black carbon aerosol concentration’s dilution and diffusion.