Table 2.

Relative Changes (Orders of Magnitude in Percent) in the Monthly Mean Values of the Surface Concentrations of ozone as Calculated for Different Regions (Non‐urban conditions)

Region	Emission Adaptation	Meteorological anomaly
North China Plain	0–+30	0–+5
Southern China	−10–−5	−5–+5
India	−15–−5	−5–+5
Northern Europe (UK, Benelux, Germany, northern France)	+2–+5	+2–+5
Southwestern Europe (south of France, Spain)	−10–−5	−20–−5
Northeastern US and southern Canada	+2–+5	−5–+2
Eastern Brazil	−25–−10	−5–+15
Peru Ecuador	−35–−25	+5–+25
South Africa	−10–−5	−5–+2

Changes due to modified emissions during the pandemic, to specific meteorological anomalies of 2020 (relative to the average from a climatology of years 2015–2019) and to the combined effects.