Table 1. Monthly mean values of global and regional total surface NO_x emission changes (in %) due to the COVID-19 restrictions.

The 1-sigma uncertainties, estimated from the SD of the multiyear BAU emissions, are also shown. W Asia, West Asia; S America, South America; N America, North America.

Region	February	March	April	May	June
Globe	−9.0 ± 1.5	−12.7 ± 1.5	−14.8 ± 2.3	−15.0 ± 1.8	−13.9 ± 1.8
Africa	−1.8 ± 3.7	−2.1 ± 4.2	−9.9 ± 4.4	−10.3 ± 4.0	−6.7 ± 4.1
Europe	−10.3 ± 4.1	−16.5 ± 4.6	−19.3 ± 5.8	−18.7 ± 5.6	−13.8 ± 3.6
Australia	−10.2 ± 4.0	−12.8 ± 5.3	−14.6 ± 5.7	−15.7 ± 6.2	−15.9 ± 7.4
Middle East + W Asia	−8.3 ± 4.8	−14.8 ± 6.8	−24.1 ± 9.7	−24.8 ± 9.6	−21.7 ± 10.6
Rest of Asia	−4.0 ± 1.3	−7.4 ± 1.6	−9.4 ± 2.6	−10.6 ± 2.1	−14.4 ± 2.1
S America	−3.3 ± 1.5	−7.0 ± 1.8	−10.2 ± 2.5	−10.2 ± 2.4	−10.3 ± 2.9
N America	−9.6 ± 2.6	−16.1 ± 4.3	−20.7 ± 6.2	−20.1 ± 5.5	−17.5 ± 4.6
China	−18.3 ±3.8	−16.4 ± 3.1	−6.2 ± 2.2	−6.3 ± 2.4	−6.9 ± 2.5