Fig. 3: City-level NO2 and O3 changes attributable to meteorological drivers.
From: Disentangling drivers of air pollutant and health risk changes during the COVID-19 lockdown in China
a, b show the average NO2 and O3 changes in 31 capital cities in each province and c, d show the city number distributions of NO2 and O3 percentage changes attributable to the meteorological drivers in each city across China during the Total COVID-lockdown period, respectively. Red solid circles represent cities with increased percentages, blue solid circles represent cities with decreased percentages. The size of the circles represents each city’s population.
