Index | [PM2.5] | ||
Annual mean (μg·m−3) | Cold season mean (μg·m−3) | Warm season mean | |
PDO positive | 10.5 | 18.2 | 7.1 |
PDO negative | 14.6 | 16.4 | 15.1 |
SOI positive | 11.2 | 17.4 | 5.3 |
SOI negative | 14.8 | 17.1 | 14.5 |
NP < a, cs, ws | 17.0 | 17.3 | 16.3 |
NP > a, cs, ws | 11.5 | 17.1 | 5.1 |