Abstract
Atmospheric particulate pollution is a significant problem across the EU and there is concern that there may be an increasing contribution from biomass burning, driven by rising fuel prices and an increased interest in the use of renewable energy sources. This study was carried out to assess current levels of biomass burning and the contribution to total PM10 across five sites in North-West Europe; an area which is frequently affected by poor air quality. Biomass burning was quantified by the determination of levoglucosan concentrations from PM10 aerosol filters collected over a 14 month period in 2013/2014 and continued for a further 12 months at the UK site in Leicester. Levoglucosan levels indicated a distinct period of increased biomass combustion between November and March. Within this period monthly average concentrations ranged between 23 ± 9.7 and 283 ± 163 ng/m3, with Lille showing consistently higher levels than the sites in Belgium, the Netherlands and the UK. The estimated contribution to PM10 was, as expected, highest in the winter season where the season average percentage contribution was lowest in Wijk aan Zee at 2.7 ± 1.4% and again highest in Lille at 11.6 ± 3.8%, with a PM10 mass concentration from biomass that ranged from 0.56 μg/m3 in Leicester to 2.08 μg/m3 in Lille. Overall there was poor correlation between the levoglucosan concentrations measured at the different sites indicating that normally biomass burning would only affect atmospheric particulate pollution in the local area; however, there was evidence that extreme burning events such as the Easter fires traditionally held in parts of North-West Europe can have far wider ranging effects on air quality. Network validation measurements were also taken using a mobile monitoring station which visited the fixed sites to carry out concurrent collections of aerosol filters; the result of which demonstrated the reliability of both PM10 and levoglucosan measurements.
Highlights
Exposure to atmospheric particulate matter (PM) has been shown to have detrimental effects on health, in particular in vulnerable groups such as the elderly, children and those with pulmonary or cardiovascular disease [1-3]
Levoglucosan is the most abundant organic tracer produced from the combustion of biomass [17], and has been used for quantification of wood burning in a variety of studies across the world [6-10, 20, 22, 28-30]
It is suitable for use as a single marker species as non-biomass burning sources of levoglucosan are likely to be insignificant
Summary
Exposure to atmospheric particulate matter (PM) has been shown to have detrimental effects on health, in particular in vulnerable groups such as the elderly, children and those with pulmonary or cardiovascular disease [1-3]. There are a variety of anthropogenic activities which contribute to total. There is, increasing concern regarding the increasing contribution of biomass burning to total PM10. Air pollution from biomass burning in some regions of Europe, such as in Scandinavia and Alpine areas, has for a long time been considered a significant contributor to atmospheric PM [5]. In some alpine areas in Europe, where wood burning is the predominant domestic heat source, biomass smoke can comprise more than. Evidence is emerging suggesting that this problem is no longer limited to these areas and that biomass burning is becoming an increasingly widespread problem across the whole of Europe [6-10]
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