Vertical Distribution of Air Particulate Matter (Pm1, Pm2.5, and Pm10) in Different Regions of Tehran Publisher



Roostaei V¹ ; Abbasi A¹ ; Gharibzadeh F¹ ; Faridi S^{1, 2} ; Naddafi K^{1, 2} ; Yunesian M^{1, 2} ; Hassanvand MS^{1, 2}
Source: Aerosol and Air Quality Research Published:2024

Abstract

Mass concentrations of particulate matter (PM1, PM2.5, and PM10) were observed at different heights (1.5, 3, 9, 15, 18, and 290 m) in Tehran using affordable particulate matter sensors (Plantower PMS5003) to study their vertical distribution. In general, the results showed that the concentration of particulate matter increased with height. The mean concentrations of PM1 at altitudes of 1–3, 9, and 15–18 m were 33.7 ± 22.4, 36.9 ± 24.7, and 38.2 ± 24.9 µg m–3, respectively. Similarly, the mean concentrations of PM2.5 were 62.9 ± 44.7, 64.4 ± 46.6, and 66.6 ± 45.8 µg m–3, respectively. Furthermore, the mean concentrations of PM10 were 73.5 ± 51.2, 76.8 ± 53.4, and 79 ± 53.7 µg m–3, respectively. Typically, as height increases, there is a general trend of the PM1/PM2.5 and PM1/PM10 ratios increasing. In contrast, the PM2.5/PM10 ratio decreases. In addition, the disparity in particulate matter concentration with altitude was more statistically significant during periods when the atmosphere exhibited greater instability. Consequently, the alterations in particulate matter concentrations as altitude increased were statistically more significant during the daytime compared to night-time. © 2024 AAGR Aerosol and Air Quality Research. All rights reserved.