Table 3 Daily (24 hours noon-to-noon, central site) median air pollution concentration and meteorology in the four cities
Helsinki | Athens | Amsterdam | Birmingham | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
10/2002-4/2004 | 10/2002-3/2004 | 10/2002-3/2004 | 11/2002-3/2004 | ||||||||||
% missing | Median | Range | % missing | Median | Range | % missing | Median | Range | % missing | Median | Range | ||
PNC | 104·cm-3 | 5.0 | 1.3 | (0.2, 4.4) | 10.5 | 2.0 | (0.3, 6.6) | 2.4 | 1.8 | (0.8, 4.4) | 21.2 | 1.9 | (0.2, 5.1) |
PM10 | μg·m-3 | 38.1 | 12.4 | (0.2, 156.4) | 6.3 | 51.7 | (8.5, 158.7) | 3.3 | 26.6 | (7.4, 126.0) | 14.6 | 16.6 | (2.8, 126.2) |
PM2.5 | μg·m-3 | 34.6 | 7.4 | (0.3, 33.2) | 6.3 | 22.7 | (2.4, 79.1) | 3.1 | 16.7 | (4.0, 103.4) | 12.8 | 8.4 | (0.7, 71.9) |
PM10-2.5 | μg·m-3 | 39.1 | 4.6 | (0.0, 152.6) | 6.7 | 28.8 | (0.7, 126.4) | 3.7 | 9.4 | (0.9, 24.2) | 15.6 | 6.9 | (0.3, 118.9) |
Absorbance | 10-5·m-1 | 38.9 | 1.2 | (0.2, 3.8) | 6.3 | 3.5 | (0.9, 8.4) | 3.1 | 1.9 | (0.5, 7.2) | 12.8 | 1.3 | (0.2, 4.9) |
NO2 | μg·m-3 | 1.4 | 22.7 | (4.5, 77.9) | 27.4 | 39.9 | (11.8, 110.9) | 0.4 | 38.4 | (10.4, 97.3) | 0.2 | 34.4 | (7.3, 83.3) |
Ozone | μg·m-3 | 1.7 | 42.5 | (4.1, 93.2) | 11.8 | 46.9 | (4.7, 108.2) | 9.4 | 33.1 | (0.9, 104.3) | 0.0 | 37.3 | (0.9, 106.6) |
Temperature | °C | 0.0 | 2.0 | (−22.8, 25.6) | 0.0 | 15.0 | (−3.1, 33.2) | 0.0 | 9.1 | (−6.1, 25.3) | 0.0 | 9.2 | (−1.4, 26.9) |
Rel. humidity | % | 0.0 | 80.7 | (36.5, 100.0) | 0.0 | 66.1 | (21.8, 93.2) | 0.0 | 80.8 | (38.5, 98.7) | 0.0 | 79.3 | (45.8, 97.9) |