Fig. 4: Ozone evolution before and after precipitation as a function of the height and rain rate.
From: Frequent rainfall-induced new particle formation within the canopy in the Amazon rainforest
The O3 concentration profiles between 0.05 and 79 m, averaged over the wet-season months (February to May) from 2018 to 2020. Representation here is synchronized to rainfall events, covering 5 hours before and 5 hours after maximum rainfall. a, The entire profile. b, The 0.5 m altitude, classified by different rainfall intensities. Colour-shaded bands represent 95% confidence intervals. The composite was made over 336 rain events with rain rates > 0.5 mm h−1. The O3 concentration increases up to three times relative to the pre-rain conditions and peaks about 1 hour after the rainfall maximum. The offset between the peaks in rainfall and O3 concentration does not depend on rainfall intensity, while the increase in O3 concentration depends on rainfall intensity.
