Table 1 Monthly mean values of global and regional total surface NOx 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.

RegionFebruaryMarchAprilMayJune
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