Time period | Meteorological parameter/air pollutant | Mean ± SD | Min | 1st Qu | Median | 3rd Qu | Max |
---|---|---|---|---|---|---|---|
Warm | Air temperature (°C) | 22.6 ± 4.8 | 6.9 | 19.8 | 23.3 | 26.2 | 32.1 |
period | Apparent temperature (°C) | 23.6 ± 6.8 | 4.3 | 19.2 | 24.5 | 29.0 | 37.7 |
 | Relative humidity (%) | 60.5 ± 18.1 | 10 | 48 | 63 | 74 | 95 |
 | Barometric pressure (hPa) | 005.0 ± 59.5 | 989 | 1001 | 1005 | 1009 | 1023 |
 | PM2.5 (μg/m3) a | 105.7 ± 66.8 | 9.9 | 53.6 | 98.4 | 138.2 | 436.7 |
 | UFP (number/cm3) a | 23940 ± 9442 | 9024 | 16920 | 21890 | 29310 | 73010 |
Cold | Air temperature (°C) | 3.4 ± 6.3 | -9.1 | -1.5 | 2.3 | 8.2 | 18.7 |
Period | Apparent temperature (°C) | 2.9 ± 5.5 | -8.0 | -1.3 | 1.9 | 6.4 | 18.1 |
 | Relative humidity (%) | 47.8 ± 20.8 | 12 31 | 46 | 63 | 96 |  |
 | Barometric pressure (hPa) | 1021.0 ± 65.4 | 999 | 1016 | 1021 | 1025 | 1037 |
 | PM2.5 (μg/m3) a | 122.0 ± 94.6 | 13.9 | 47.5 | 90.3 | 184.4 | 413.4 |
 | UFP (number/cm3) a | 30940 ± 10637 | 13460 | 24120 | 29150 | 35550 | 76280 |