Extended Data Fig. 2: Diurnal variations of NO (a) and O3 (b) concentrations in the pre-lockdown and lockdown periods. | Nature Geoscience

Extended Data Fig. 2: Diurnal variations of NO (a) and O3 (b) concentrations in the pre-lockdown and lockdown periods.

From: Increasing contribution of nighttime nitrogen chemistry to wintertime haze formation in Beijing observed during COVID-19 lockdowns

Extended Data Fig. 2

Data of clean conditions (PM2.5 < 50 μg m−3) and during polluted conditions (PM2.5 > 150 μg m−3) on the left and right panels, respectively. The solid lines denote the median values, shaded areas represent the range of 25 %–75 % variations, and empty squares indicate the mean values.

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