Fig. 4: Diurnal variations of nitrate formation pathways. | npj Climate and Atmospheric Science

Fig. 4: Diurnal variations of nitrate formation pathways.

From: A diurnal story of Δ17O(\(\rm{NO}_{3}^{-}\)) in urban Nanjing and its implication for nitrate aerosol formation

Fig. 4

The changes in a mass concentrations of nitrate (\(\rm{NO}_{3}^{-}\)), b oxygen isotope anomaly of nitrate (∆17O(\(\rm{NO}_{3}^{-}\))), c mass concentrations of nitrogen dioxide (NO2), d–f the relative contributions of three pathways (pathway 1: NO2 + OH/H2O, pathway 2: N2O5 + H2O and pathway 3: NO3 + HC/H2O and N2O5 + Cl−) to nitrate production, g mass concentrations of ozone (O3), h ambient temperature (temp) and i relative humidity (RH) throughout the day during the sampling period. The mean (cross), median (horizontal line), 25th and 75th percentiles (lower and upper box), and 10th and 90th percentiles (lower and upper whiskers) are shown in each box.

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