Table 6.
Descriptives of the meteorological variables during the COVID-19 pandemic.
| Megacities | Pollutants | Pre lockdown period (Feb 2020) AM±SD [Max-Min] | Lockdown period (May 2020) AM±SD [Max-Min] | Unlock period (June 2020) AM±SD [Max-Min] |
|---|---|---|---|---|
| Bangalore | Temperature (°C) | 23.9 ± 3.5* [17.3–29.8] |
24.4 ± 1.8* [28.9–23.1] |
27.6 ± 1.2* [25.6–28.1] |
| RH (%) | 54.9 ± 18.5* [19.5–85.5] |
59.2 ± 7.5* [47.2–74.2] |
71.4 ± 4.8* [62.3–86.8] |
|
| WS (m s−1) | 1.7 ± 1.2* [0.23–2.9] |
1.5 ± 0.3* [0.9–2.5] |
02.1 ± 0.3* [1.3–2.9] |
|
| Chennai | Temperature (°C) | a | 31.6 ± 0.9* [30.5–34.1] |
31.1 ± 1.2* [27.5–33.3] |
| RH (%) | 66.9 ± 10.0* [36.4–86.1] |
67.2 ± 6.3* [47.3–75.0] |
69.1 ± 7.7* [56.7 ± 84.5] |
|
| WS (m s−1) | 3.5 ± 1.0* [0.9–6.6] |
4.6 ± 0.8* [3.1–6.1] |
4.7 ± 0.8* [1.6–6.0] |
|
| Delhi | Temperature (°C) | a | 30.13 ± 2.32* [26.7–34.8] |
32.05 ± 2.58* [25.2–35.5] |
| RH (%) | 66.6 ± 16.4* [34.3–89.9] |
48.03 ± 9.10* [34.3–61.5] |
57.6 ± 4.5* [48.±67.6] |
|
| WS (m s−1) | 0.9 ± 0.5* [0.1–3.1] |
0.9 ± 0.2* [0.6–1.9] |
0.6 + 1.2* [0.6–1.2] |
|
| Kolkata | Temperature (°C) | 22.1 ± 3.6* [13.1–30.3] |
27.4 ± 2.1* [23.7–31.5] |
28.9 ± 1.2* [26.9–31.6] |
| RH (%) | 58.0 ± 18.2* [23.9–99.6] |
75.6 ± 8.5* [62.6–94.6] |
82.6 ± 7.7* [68.3–97.1] |
|
| WS (m s−1) | 0.3 ± 0.3* [0.0 ± 1.7] |
0.9 ± 1.0* [0.2–4.1] |
1.2 ± 0.6* [0.3–2.6] |
|
| Mumbai | Temperature (°C) | 28.2 ± 3.8* [19.4–39.3] |
32.6 ± 0.5* [31.3–33.6] |
30.2 ± 1.4* [25.1–32.0] |
| RH (%) | 57.6 ± 14.2* [18.0–91.7] |
73.2 ± 2.0* [66.3–76.7] |
84.3 ± 5.0* [76.6–98.53] |
|
| WS (m s−1) | 0.2 ± 0.3* [0.0–2.3] |
1.5 ± 0.1* [1.3–2.0] |
1.4 ± 0.5* [0.6–3.7] |
*Temperature, RH and wind speed vary across the three lockdown periods significantly in each city (ANOVA, p ≤ 0.05).
a
Data not available.