Table 2.
Temperature and NO2 concentration in Wallonia, 2008–2011.
| Percentiles |
Mean ± sd | |||||
|---|---|---|---|---|---|---|
| 5% | 25% | 50% | 75% | 95% | ||
| NO2 (µg/m3) | ||||||
| All year (n=1461) | 8.9 | 13.6 | 18.7 | 25.9 | 36.9 | 20.5 ± 9.1 |
| Warm period (n=368) | 7.7 | 11.2 | 13.5 | 16.6 | 22.8 | 14.2 ± 4.6 |
| Cold period (n=361) | 11.1 | 17.3 | 24.8 | 32.9 | 45.4 | 26.1 ± 11.0 |
| Temperature (°C) | ||||||
| All year (n=1461) | -0.9 | 5.8 | 11.1 | 16.3 | 21.1 | 10.8 ± 6.8 |
| Warm period (n=368) | 13.4 | 15.8 | 17.7 | 23.4 | 18.0 | 18.0 ± 3.2 |
| Cold period (n=361) | -3.8 | 0.5 | 3.3 | 6.1 | 9.2 | 3.0 ± 4.1 |
Abbreviations: NO2: nitrogen dioxide; sd: standard deviation.
Warm period: June–August; cold period: December–February.