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Original scientific paper

https://doi.org/10.2478/aiht-2022-73-3610

Influence of number of visitors and weather conditions on airborne particulate matter mass concentrations at the Plitvice Lakes National Park, Croatia during summer and autumn

Zvjezdana Bencetić Klaić orcid id orcid.org/0000-0002-8426-9351 ; University of Zagreb Faculty of Science, Department of Geophysics, Zagreb, Croatia
Manuel Andres Leiva-Guzmán ; University of Chile Faculty of Science, Department of Chemistry, Santiago, Chile
Andrijana Brozinčević ; Dr Ivo Pevalek Scientific Research Centre, Plitvice Lakes National Park, Croatia


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Abstract

We investigated the influence of local meteorological conditions and number of visitors on ambient particulate matter (PM) mass concentrations and particle fraction ratios at the Plitvice Lakes National Park between July and October 2018. Outdoor mass concentrations of particles with aerodynamic diameters of less than 1, 2.5, and 10 μm (PM1, PM2.5, and PM10, respectively) and indoor PM1 were measured with two light-scattering laser photometers set up near the largest and most visited Kozjak Lake. Our findings suggest that the particles mainly originated from background sources, although some came from local anthropogenic activities. More specifically, increases in both indoor and outdoor mass concentrations coincided with the increase in the number of visitors. Indoor PM1 concentrations also increased with increase in outdoor air temperature, while outdoor PMs exhibited U-shaped dependence (i.e., concentrations increased only at higher outdoor air temperatures). This behaviour and the decrease in the PM1/PM2.5 ratio with higher temperatures suggests that the production and growth of particles is influenced by photochemical reactions. The obtained spectra also pointed to a daily but not to weekly periodicity of PM levels.

Keywords

anthropogenic PM sources, bivariate polar plot, light-scattering laser photometry, weighted overlapped segment averaging

Hrčak ID:

274553

URI

https://hrcak.srce.hr/274553

Article data in other languages: croatian

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