Research Article
COVID-19 Lockdown Unravels the Complex Interplay between Environmental Conditions and Human Activity
Table 3
Main descriptive statistics of the data items divided by time groups as specified in Appendix B.
| Variable | Average | Std. Deviation | Group 1.1 | Group 1.2 | Group 2.1 | Group 2.2 | Group 1.1 | Group 1.2 | Group 2.1 | Group 2.2 |
| NO2 [mcg/m2] | 6367.59 | 3747.44 | 6891.16 | 2677.80 | 2822.47 | 1618.58 | 6853.91 | 1447.24 | Surface pressure [Pa] | 95227.33 | 94666.43 | 94729.76 | 94938.83 | 700.79 | 763.56 | 853.13 | 558.27 | Surface net solar radiation [kJ/m2] | 5108.60 | 7817.19 | 4632.62 | 8142.56 | 1244.45 | 2144.71 | 1182.88 | 2335.69 | Temperature-2m [K] | 277.45 | 281.95 | 277.64 | 282.32 | 2.21 | 2.06 | 1.94 | 3.64 | Total precipitation [mm] | 0.42 | 2.35 | 0.92 | 1.20 | 1.19 | 3.82 | 2.11 | 2.15 | Wind direction [] | −48.73 | −32.45 | −51.94 | −7.52 | 25.84 | 55.36 | 27.21 | 52.37 | Wind speed [m/s] | 1.06 | 1.03 | 1.04 | 0.95 | 0.53 | 0.50 | 0.57 | 0.55 | Total load [MWh] | 37.60 | 33.87 | 37.05 | 27.86 | 4.20 | 4.98 | 4.04 | 3.13 | Retail and recreation [%] | — | — | −23.00 | −85.98 | — | — | 22.08 | 6.19 | Grocery and pharmacy [%] | — | — | −2.82 | −50.23 | — | — | 11.85 | 15.82 | Parks [%] | — | — | 1.96 | −77.31 | — | — | 32.62 | 10.52 | Transit stations [%] | — | — | −30.21 | −82.94 | — | — | 25.26 | 4.04 | Workplaces [%] | — | — | −18.32 | −67.63 | — | — | 16.04 | 7.79 | Residential [%] | — | — | 8.79 | 31.77 | — | — | 8.58 | 5.72 | Driving [%] | — | — | −8.93 | −80.25 | — | — | 33.33 | 5.08 | Change in movement [%] | — | — | −27.09 | −66.04 | — | — | 13.73 | 7.82 |
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