Major air pollutants seasonal variation analysis and long-range transport of PM10 in an urban environment with specific climate condition in Transylvania (Romania)

The air quality decrease, especially in urban areas, is related to local-scale conditions and to dispersion of air pollutants (regional and long-range) as well. The main objective of this study was to decipher the seasonal variation of PM 10 , NO, NO 2 , NO x , SO 2 , O 3 , and CO over a 1-year peri...

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Veröffentlicht in:Environmental science and pollution research international 2020-10, Vol.27 (30), p.38181-38199
Hauptverfasser: Bodor, Zsolt, Bodor, Katalin, Keresztesi, Ágnes, Szép, Róbert
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description The air quality decrease, especially in urban areas, is related to local-scale conditions and to dispersion of air pollutants (regional and long-range) as well. The main objective of this study was to decipher the seasonal variation of PM 10 , NO, NO 2 , NO x , SO 2 , O 3 , and CO over a 1-year period (2017) and the possible relationships between air pollution and meteorological variables. Furthermore, trajectory cluster analysis and concentration-weighted trajectory (CWT) methods were used to assess the trajectories and the source-receptor relationship of PM 10 in the Ciuc basin Transylvania, known as the “Cold Pole” of Romania. The pollutants show lower concentrations during warmer periods, especially during summer, and significantly higher concentrations were observed on heating season in winter due to seasonal variations in energy use (biomass burning) and atmospheric stability. Subsequently, in February, the highest concentration of PM 10 was 132 μg/m 3 , which is 4 times higher than the highest recorded monthly mean. Our results indicate a negative correlation between CO/temperature (− 0.89), NO x /temperature (− 0.84) and positive between NO x /PM 10 (0.95), CO/PM 10 (0.9), and NO x /CO (0.98), respectively. Dominant transport pathways were identified and the results revealed that slow-moving southerly (~ 45%) and northwesterly (~ 32%) air masses represent almost 80% and mainly regional flows were discerned. During 2017, increased PM 10 levels were measured at the study site when air masses arrived mostly from northwest and southeast. The CWT and polarplot models show a strong seasonal variation and significant differences were observed between weekdays and weekends, namely highest PM 10 concentrations during weekends at low wind speed (2–4 m/s).
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source Springer Nature - Complete Springer Journals
subjects Air masses
Air pollution
Air quality
Aquatic Pollution
Atmospheric models
Atmospheric Protection/Air Quality Control/Air Pollution
Biomass burning
Biomass energy production
Burning
Carbon monoxide
Climatic conditions
Cluster analysis
Earth and Environmental Science
Ecotoxicology
Energy consumption
Environment
Environmental Chemistry
Environmental Health
Environmental science
Nitrogen dioxide
Outdoor air quality
Particulate matter
Pollutants
Pollution dispersion
Research Article
Seasonal variations
Sulfur dioxide
Trajectory analysis
Urban areas
Urban environments
Waste Water Technology
Water Management
Water Pollution Control
Wind speed
title Major air pollutants seasonal variation analysis and long-range transport of PM10 in an urban environment with specific climate condition in Transylvania (Romania)
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