Research Article
Seasonal Variability of Air Pollutants and Their Relationships to Meteorological Parameters in an Urban Environment
Table 1
The seasonal average pollution concentrations.
| | Station | Season | PM2.5 (μg/m3) | PM10 (μg/m3) | O3 (ppb) | CO (ppb) | NO2 (ppb) | SO2 (ppb) |
| | Colombo | FIM | 22.0 (25.8) | 41.2 (42.5) | 19.7 (8.5) | 618.3 (697.2) | 15.4 (18.2) | 5.0 (4.5) | | NEM | 29.5 (33.0) | 48.8 (50.1) | 24.9 (11.2) | 690.5 (744.6) | 18.6 (19.1) | 9.7 (9.1) | | SIM | 18.5 (23.9) | 31.7 (37.9) | 20.6 (10.5) | 524.2 (648.6) | 11.6 (13.4) | 6.4 (5.8) | | SWM | 12.5 (14.1) | 28.9 (30.2) | 11.8 (7.0) | 486.8 (530.8) | 7.7 (9.5) | 4.8 (5.0) |
| | Kandy | FIM | 21.9 (18.7) | 51.1 (40.7) | 21.1 (12.1) | 606.3 (529.8) | 16.4 (10.5) | 1.3 (1.1) | | NEM | 16.6 (13.0) | 43.7 (31.2) | 19.0 (18.3) | 700.9 (566.5) | 14.5 (8.7) | 1.4 (1.1) | | SIM | 17.2 (13.5) | 42.8 (30.8) | 11.8 (7.2) | 702.0 (560.3) | 12.4 (7.3) | 1.4 (1.2) | | SWM | 17.3 (10.3) | 52.0 (30.3) | 8.4 (7.7) | 763.6 (543.9) | 15.9 (7.8) | 1.8 (1.4) |
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They are highlighted due to their maximum value.
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