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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:57 |
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Conference: Bucharest University Faculty of Physics 2024 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
New insights into Ploiesti's air quality: assessment, sources, temporal patterns and trends
Authors:
Bianca Mihalache (1), Marilena Colt (2), Sabina Stefan (1,3), Gabriela Iorga (1,4)
*
Affiliation:
1) University of Bucharest, Faculty of Physics, Magurele, 077125 Bucharest, Romania
2) “Ion Luca Caragiale” National College, 100164 Ploiesti, Romania
3) Academy of Romanian Scientists, 050044 Bucharest, Romania
4) University of Bucharest, Faculty of Chemistry, 030018 Bucharest, Romania
E-mail
mhl.bianca10@gmail.com
gabriela.iorga@g.unibuc.ro
Keywords:
air quality, pollution episode, statistical analysis, urban area, temporal pattern, temporal trend
Abstract:
This paper is focused on assessment of atmospheric major pollutants (particulate matter (PM10, PM2.5) and gaseous pollutants (NO2, CO, SO2, O3, VOCs) mass concentrations in urban agglomeration of Ploiesti in order to understand the typical pollution level by particulate matter over the entire city area, from inner part to outskirts. We also aimed to identify the pollution sources within the area and to investigate the pollutants temporal pattern (annual, seasonal, weekly, daily) and trends. A synthetic database consisting of time series of hourly and daily values of major pollutants and meteorological observations (temperature, relative humidity, pressure, wind speed and direction, atmospheric boundary layer) was constructed. Statistical analysis was performed using R package. Longitudinal analysis spanning back to 2008 elucidates temporal trends in pollutant concentrations, providing insights into the dynamics of air quality.
To highlight shorter-term temporal and spatial variations, a four-year period (2018-2021) of data was investigated. Results indicate the air pollution is not specific to a limited area of the city. Although there are a few days and hours in a day when pollution is most intense in a certain location, the phenomenon is widespread throughout the city. Apart from the mean situation of air pollution, pollution events were analyzed and comparatively presented. It has been shown that the atmospheric stability has an important role in the pollutants accumulation at the scale of Ploiesti urban agglomeration. A special attention was dedicated to the identification of major pollution sources that contribute the measured concentrations. Despite its modest size, Ploiesti's industrial footprint exerts a substantial influence on local air quality.
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