Table 2 Baseline statistical analysis for yearly weather conditions and air pollutants from 2017 to 2022 in Macau.
Variable | Mean (SD) | 2017 (SD) | 2018 (SD) | 2019 (SD) | 2020 (SD) | 2021 (SD) | 2022 (SD) |
|---|---|---|---|---|---|---|---|
Mean temperature (°C) | 23.2 (5.1) | 23.0 (5.1) | 22.9 (5.4) | 23.6 (4.6) | 23.3 (5.0) | 23.5 (5.0) | 22.8 (5.6) |
Mean relative humidity (%) | 81.0 (11.3) | 81.0 (11.0) | 81.0 (10.8) | 82.2 (10.8) | 82.2 (10.9) | 78.2 (11.8) | 81.5 (11.9) |
Mean precipitation (mm) | 5.4 (17.6) | 4.9 (14.7) | 4.9 (14.3) | 6.2 (15.0) | 4.7 (14.7) | 6.0 (25.0) | 5.6 (19.5) |
Mean PM10 (daily µg/m3) | 42.6 (22.4) | 46.7 (26.6) | 45.0 (21.6) | 46.6 (23.2) | 39.8 (19.9) | 41.0 (22.4) | 36.6 (18.0) |
Mean NO2 (1-hour µg/m3) | 50.7 (28.1) | 69.7 (21.7) | 63.2 (26.0) | 61.6 (24.3) | 51.2 (22.9) | 30.5 (15.2) | 27.7 (12.2) |
Mean SO2 (daily µg/m3) | 4.4 (2.4) | 7.1 (2.6) | 4.6 (2.3) | 1.8 (1.4) | 3.3 (1.3) | 5.3 (0.9) | 4.5 (0.8) |
