Polycyclic aromatic hydrocarbons in background air in central Europe - Seasonal levels and limitations for source apportionment

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Publikace nespadá pod Filozofickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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DVORSKÁ Alice KOMPRDOVÁ Klára LAMMEL Gerhard KLÁNOVÁ Jana PLACHÁ H.

Rok publikování 2012
Druh Článek v odborném periodiku
Časopis / Zdroj Atmospheric Environment
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Doi http://dx.doi.org/10.1016/j.atmosenv.2011.10.007
Obor Znečištění a kontrola vzduchu
Klíčová slova Polycyclic aromatic hydrocarbons; Source apportionment; Positive matrix factorization; Background site; Degradation
Popis Positive matrix factorization (PMF) was applied on a large dataset of polycyclic aromatic hydrocarbon (PAH) concentrations determined in air at the central European background monitoring site Kosetice, Czech Republic. The long-term (1996-2009) PAH median concentration in Kosetice is about 6 times higher during winter than summer months. As the source apportionment of these pollutants is accompanied by concerns regarding the loss of the source signature during atmospheric transport. PMF was run on two winter PAH concentration data subsets stratified according to different ambient levels of oxidants. It is suggested, that the typical ambient air PAH pattern is largely preserved on a regional transport scale in winter in central Europe. However, the allocation of PMF model factors to particular PAH source categories (e.g., road traffic, residential wood combustion, residential and industrial coal combustion) could not be achieved due to (a) a high similarity of reference PAH profiles among each other and (b) variability in ambient reference PAH profiles. It is suggested, that the commonly studied set of EPA PAHs is not source category specific and thus not suitable for source apportionment.
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