There is an increasing scientific interest in carbonaceous aerosols due to their effects on local air quality and climate. The database of the UK air monitoring networks from 2009 to 2017 was analyzed to examine the trends in black carbon (BC), brown carbon (BrC), elemental carbon (EC) and organic carbon (OC) at 11 sites with different classifications over the UK. The concentrations increased from rural to urban background to kerbside sites. BC showed the strongest variation, with maxima at kerbside (>9.0 μg m⁻³) and minima at rural sites (below 1.0 μg m⁻³). On the other hand, BrC showed no clear variation according to site classification. BrC increased as domestic emissions of wood smoke increased at weekends. Total OC and secondary OC showed a winter maximum at urban and kerbside sites, while BC increased during the winter at urban sites and in autumn at kerbside sites. Secondary Organic Carbon is dominated by regional transport processes. All pollutants revealed a decreasing long-term trend in the UK, the most significant reduction was observed in BC levels, particularly at the kerbside site (−0.87 μg m⁻³ yr⁻¹), with lesser rates of decline (−0.08 to −0.13 μg m⁻³ yr⁻¹) at urban background sites. The general behaviour of BrC was consistent with a major contribution from regional transport. As expected, EC shows similar behaviour to BC, and OC/EC ratios have increased with time as diesel particle filters have reduced EC emissions more than OC, and other sources of primary OC have not changed markedly.

由于碳质气雾剂对当地空气质量和气候的影响，因此对碳质气雾剂的科学兴趣在不断提高。分析了2009年至2017年英国空气监测网络的数据库，以检查11个地点的黑碳（BC），棕碳（BrC），元素碳（EC）和有机碳（OC）的趋势。英国。浓度从农村到城市背景再到路边站点都增加了。BC表现出最强的变化，最大值出现在路边（> 9.0μgm ^-3），最小出现在农村地区（低于1.0μgm ^-3））。另一方面，BrC没有显示出根据位点分类的明显变化。随着周末国内木烟排放量的增加，BrC有所增加。城市和路边站点的总OC和次要OC均显示冬季最高，而城市站点的冬季和秋天的路边BC均增加。次级有机碳主要由区域运输过程控制。在英国，所有污染物均显示出长期趋势呈下降趋势，其中BC含量的下降最为明显，尤其是在路边站点（−0.87μgm ^-3 yr ^-1），下降速率较小（−0.08至- 0.13μgm ^-3 yr ^-1）。BrC的总体行为与区域交通的主要贡献相一致。不出所料，EC表现出与BC类似的行为，并且OC / EC比率随时间增加，因为柴油机颗粒过滤器减少的EC排放量超过OC，其他主要OC的来源也没有明显变化。