Vertical Distribution of Air Particulate Matter (PM_1, PM_(2.5), and PM_(10)) in Different Regions of Tehran

10.4209/aaqr.240036

Vahid Roostaei；Atefeh Abbasi；Farzaneh Gharibzadeh；Sasan Faridi；Kazem Naddafi；Masud Yunesian；Mohammad Sadegh Hassanvand

Air pollution ； Particulate matter ； Vertical profile ； Tehran

Aerosol and Air Quality Research

24卷10期（2024 / 10 / 01）

1 - 14+ap15

英文

Mass concentrations of particulate matter (PM_1, PM_(2.5), and PM_(10)) 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 PM_1 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 PM_(2.5) were 62.9 ± 44.7, 64.4 ± 46.6, and 66.6 ± 45.8 µg m^(-3), respectively. Furthermore, the mean concentrations of PM_(10) 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 PM_1/PM_(2.5) and PM_1/PM_(10) ratios increasing. In contrast, the PM_(2.5)/PM_(10) 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.