A diurnal story of Δ17O() in urban Nanjing and its implication for nitrate aerosol formation
Inorganic nitrate production is critical in atmospheric chemistry that reflects the oxidation
capacity and the acidity of the atmosphere. Here we use the oxygen anomaly of nitrate
(Δ17O (NO 3−)) in high-time-resolved (3 h) aerosols to explore the chemical mechanisms of
nitrate evolution in fine particles during the winter in Nanjing, a megacity of China. The
continuous Δ17O (NO 3−) observation suggested the dominance of nocturnal chemistry
(NO3+ HC/H2O and N2O5+ H2O/Cl−) in nitrate formation in the wintertime. Significant …
capacity and the acidity of the atmosphere. Here we use the oxygen anomaly of nitrate
(Δ17O (NO 3−)) in high-time-resolved (3 h) aerosols to explore the chemical mechanisms of
nitrate evolution in fine particles during the winter in Nanjing, a megacity of China. The
continuous Δ17O (NO 3−) observation suggested the dominance of nocturnal chemistry
(NO3+ HC/H2O and N2O5+ H2O/Cl−) in nitrate formation in the wintertime. Significant …
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