Combination of Different Approaches to Infer Local or Regional Contributions to PM2.5 Burdens in Graz, Austria

A study on PM2.5 pollution in Graz, Austria, during January to March 2017 revealed that high particulate matter (PM) levels were driven by a mix of local and regional sources. Researchers used PM10 concentration ratios from urban and background sites, alongside chemical analysis of PM2.5 (including water-soluble ions, organic carbon, and polycyclic aromatic hydrocarbons), to distinguish between locally emitted pollutants and those transported regionally. Source apportionment via a macro-tracer model confirmed that while local emissions contributed significantly, regional pollution episodes also played a major role in exceeding EU short-term limits for PM10 on 34 days. This multi-method approach provided clear evidence of the dual nature of PM2.5 burdens, offering insights into air quality management strategies.

Kirchsteiger, B., Kistler, M., Steinkogler, T., Herzig, C., Limbeck, A., Schmidt, C., Rieder, H., & Kasper-Giebl, A. (2020). Combination of Different Approaches to Infer Local or Regional Contributions to PM2.5 Burdens in Graz, Austria. Applied Sciences, 10(12), 4222. https://doi.org/10.3390/app10124222