Receptor modelling of secondary and carbonaceous particulate matter at a southern UK site
Receptor modelling of secondary and carbonaceous particulate matter at a southern UK site
复制标题
DOI：
10.5194/acp-13-1879-2013
复制
发表时间：
2013-01-01
影响因子：
6.3
通讯作者：
Harrison, R. M.
中科院分区：
文献类型：
--
作者：
Charron, A.;Degrendele, C.;Harrison, R. M.
已采取补充办法，以更好地了解来源及其空间分布的二次无机（硝酸盐和硫酸盐）和二次有机气溶胶采样在农村网站（哈韦尔）在英国南部。浓度场图方法应用于1581个每日样本的氯化物，硝酸盐和硫酸盐从2006年至2010年，982个样本的有机碳和元素碳从2007年至2010年。这揭示了西欧/中欧硝酸盐、硫酸盐和次生有机碳的来源模式相当相似，在硝酸盐、硫酸盐、有机碳和次生有机碳的情况下，分别与NOx、SO2和VOC的EMEP排放图显著相关。一个稍微偏南的来源强调次生有机碳可能反映了生物源的贡献。轨迹集群证实了这种行为模式的主要贡献来自欧洲大陆的来源。类似的行为，一方面，硫酸盐和有机碳，另一方面，EC和硝酸盐表明，前者更容易受到区域的影响比后者在协议的硫酸盐和二次有机气溶胶的形成速度较慢，比硝酸盐，和本地/中尺度的影响后，初级EC。然而，仔细分析后的轨迹和浓度场地图表明，欧洲大陆的网站在哈维尔EC浓度的强大贡献。在一项单独的研究中，在Harwell和伯明翰（英国）郊区的100个同时收集的样品中进行了硫酸盐，硝酸盐，元素和有机碳的测量。这表明两个站点之间的浓度为所有的二次成分的显着相关性，进一步表明二次有机气溶胶是一个区域污染物的行为类似于硫酸盐和硝酸盐。
Complementary approaches have been taken to better understand the sources and their spatial distribution for secondary inorganic (nitrate and sulphate) and secondary organic aerosol sampled at a rural site (Harwell) in the southern United Kingdom. A concentration field map method was applied to 1581 daily samples of chloride, nitrate and sulphate from 2006 to 2010, and 982 samples for organic carbon and elemental carbon from 2007 to 2010. This revealed a rather similar pattern of sources for nitrate, sulphate and secondary organic carbon within western/central Europe, which in the case of nitrate, sulphate, organic carbon and secondary organic carbon, correlated significantly with EMEP emissions maps of NOx, SO2, and VOC respectively. A slightly more southerly source emphasis for secondary organic carbon may reflect the contribution of biogenic sources. Trajectory clusters confirm this pattern of behaviour with a major contribution from mainland European sources. Similar behaviours of, on the one hand, sulphate and organic carbon and, on the other hand, EC and nitrate showed that the former are more subject to regional influence than the latter in agreement with the slower atmospheric formation of sulphate and secondary organic aerosol than for nitrate, and the local/mesoscale influences upon primary EC. However, careful analysis of back trajectories and Concentration Field Maps indicates a strong contribution of mainland European sites to EC concentrations at Harwell. In a separate study, measurements of sulphate, nitrate, elemental and organic carbon were made in 100 simultaneously collected samples at Harwell and at a suburban site in Birmingham (UK). This showed a significant correlation in concentrations between the two sites for all of the secondary constituents, further indicating secondary organic aerosol to be a regional pollutant behaving similarly to sulphate and nitrate.