Journal
APPLIED SCIENCES-BASEL
Volume 10, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/app10124222
Keywords
particulate matter; PM exceedance; polycyclic aromatic hydrocarbons; macro-tracer; source apportionment; urban impact; regional episodes; air pollution
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Funding
- provincial government of Styria
- TU Wien
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In early 2017 high particulate matter (PM) levels were observed across mid-Europe, including Austria. Here we characterize PM pollution in the city of Graz during January to March 2017, a period with substantial exceedances (34 days) of the European Union (EU) PM(10)short time limit value. This study evaluates whether the observed exceedances can be attributed to the accumulation of pollutants emitted by local sources or to a larger scale pollution episode including transport. The analyses are based on the ratios of PM(10)concentrations determined at an urban and background site, and the analyses of chemical composition of PM(2.5)samples (i.e., water soluble ions, organic and elemental carbon, anhydro-sugars, humic-like substances, aluminum, and polycyclic aromatic hydrocarbons). Source apportionment was realized using a macro-tracer model. Overall, the combination of different approaches (PM(10)ratios, chemical composition, and macro-tracer derived source apportionment) enabled a conclusive identification of time periods characterized by the accumulation of emissions from local sources or regional pollution episodes.
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