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Comparison of methods for evaluation of wood smoke and estimation of UK ambient concentrations

机译：比较评估木材烟雾和估算英国环境浓度的方法

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Airborne concentrations of the wood smoke tracers, levoglucosan and fine potassium have been measured at urban and rural sites in the United Kingdom alongside measurements with a multi-wavelength aethalometer. The UK sites, and especially those in cities, show low ratios of levoglucosan to potassium in comparison to the majority of published data. It is concluded that there may be two distinct source types, one from wood stoves and fireplaces with a high organic carbon content, best represented by levoglucosan, the other from larger, modern appliances with a very high burn-out efficiency, best represented by potassium. Based upon levoglucosan concentrations and a conversion factor of 11.2 from levoglucosan to wood smoke mass, average concentrations of wood smoke including winter and summer sampling periods are 0.23 μg m~(-3) in Birmingham and 0.33 μg m~(-3) in London, well below concentrations typical of other northern European urban areas. There may be a further contribution from sources of potassium-rich emissions amounting to an estimated 0.08 μg m~(-3) in Birmingham and 0.30 μg m~(-3) in London. Concentrations were highly correlated between two London sites separated by 4 km suggesting that a regional source is responsible. Data from the aethalometer are either supportive of these conclusions or suggest higher concentrations, depending upon the way in which the data are analysed.
机译：在英国的城市和农村地区，已经对木烟示踪剂，左旋葡聚糖和细钾的空气中浓度进行了测量，并使用了多波长测湿仪进行了测量。与大多数公布的数据相比，英国站点，尤其是城市站点的左旋葡聚糖与钾的比率较低。结论是，可能存在两种不同的来源类型，一种来自具有高有机碳含量的木灶和壁炉，最好以左旋葡聚糖为代表，另一种来自具有很高燃尽效率的大型现代器具，最好以钾为代表。根据左旋葡聚糖的浓度和从左旋葡聚糖到木烟质量的换算系数11.2，伯明翰的包括冬季和夏季采样期在内的木烟平均浓度为0.23μgm〜（-3），在伦敦为0.33μgm〜（-3）。 ，远低于其他北欧城市地区的典型浓度。伯明翰的富含钾的排放源可能估计为0.08μgm〜（-3），伦敦的估计值为0.30μgm〜（-3）。伦敦的两个站点之间的浓度高度相关，相距4 km，表明区域来源负责。湿度计的数据要么支持这些结论，要么建议更高的浓度，这取决于数据的分析方式。

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