Table 2 Hourly mean concentration of air pollutants
Morning | Noon | Evening | Night | ||||||
|---|---|---|---|---|---|---|---|---|---|
(6 a.m. through 7 a.m.) | (12 p.m. through 1 p.m.) | (6 p.m. through 7 p.m.) | (12 a.m. through 1 a.m.) | ||||||
Mean | (SD) | Mean | (SD) | Mean | (SD) | Mean | (SD) | ||
PM2.5 | (μg/m3) | 24.0 | (17.6) | 26.9 | (21.4) | 30.0 | (22.0) | 25.8 | (17.6) |
Ox | (ppb) | 8.3 | (6.8) | 23.3 | (12.3) | 13.1 | (9.0) | 9.1 | (7.6) |
NO2 | (ppb) | 24.0 | (9.4) | 22.2 | (16.0) | 32.6 | (12.8) | 28.3 | (12.1) |
Temperature | (°C) | 10.1 | (5.6) | 15.9 | (5.0) | 14.2 | (4.6) | 11.6 | (5.1) |