Table 2. Summary statistics for daily temperature, fine particulate matter, and ozone concentrations, by city.
| City | Daily mean temperature (°C) |
Daily mean PM2.5 (µg/m3) |
Daily maximum 8-hr O3 (ppbv) |
||||||
| P99 | P90 | P50 | P10 | P1 | P50 | IQR | P50 | IQR | |
| Sapporo | 25.7 | 21.0 | 9.8 | −3.3 | −6.7 | 10.9 | (8.3, 14.6) | 30.8 | (26.0, 32.5) |
| Sendai | 27.5 | 23.8 | 13.0 | 1.9 | −1.1 | 11.3 | (8.2, 16.6) | 36.6 | (30.0, 44.5) |
| Tokyo | 30.6 | 27.5 | 17.2 | 6.3 | 3.6 | 18.0 | (12.5, 24.3) | 33.6 | (23.4, 36.8) |
| Nagoya | 30.3 | 27.5 | 16.7 | 4.7 | 1.5 | 17.9 | (12.2, 25.6) | 34.3 | (24.9, 35.7) |
| Osaka | 30.8 | 28.8 | 17.7 | 6.2 | 3.2 | 18.5 | (12.9, 25.9) | 37.6 | (28.9, 49.5) |
| Fukuoka | 30.5 | 28.2 | 17.9 | 6.8 | 3.1 | 19.1 | (13.4, 27.5) | 38.3 | (30.3, 47.2) |
PM2.5, particulate matter with an aerodynamic diameter of <2.5 µm; P99, 99th percentile; P90, 90th percentile; P25, 25th percentile; P10, 10th percentile; P1, 1st percentile; IQR, interquartile range.