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- W2953394880 abstract "We coupled the heterogeneous hydrolysis of N2O5 into the newly updated Weather Research and Forecasting model with Chemistry (WRF-Chem) to reveal the relative importance of the hydrolysis of N2O5 and additional nitrous acid (HONO) sources for the formation of nitrate during high PM2.5 events in the North China Plain (NCP) in four seasons. The results showed that additional HONO sources produced the largest nitrate concentrations in winter and negligible nitrates in summer, leading to a 10% enhancement of a PM2.5 peak in southern Beijing and a 15% enhancement in southeastern Hebei in winter. In contrast, the hydrolysis of N2O5 produced high nitrate in summer and low nitrate in winter, with the largest contribution of nearly 20% for a PM2.5 peak in southeastern Hebei in summer. During PM2.5 explosive growth events, the additional HONO sources played a key role in nitrate increases in southern Beijing and southwestern Hebei in winter, whereas the hydrolysis of N2O5 contributed the most to a rapid increase in nitrate in other seasons. HONO photolysis produced more hydroxyl radicals, which were >1.5 μg m−3 h−1 in the early explosive stage and led to a rapid nitrate increase at the southwestern Hebei sites in winter, while the heterogeneous reaction of N2O5 contributed greatly to a significant increase in nitrate in summer. The above results suggest that the additional HONO sources and the heterogeneous hydrolysis of N2O5 contributed the most to nitrate formation in NCP in winter and summer, respectively." @default.
- W2953394880 created "2019-07-12" @default.
- W2953394880 creator A5002450650 @default.
- W2953394880 creator A5013592125 @default.
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- W2953394880 creator A5045694659 @default.
- W2953394880 creator A5066930256 @default.
- W2953394880 creator A5085462851 @default.
- W2953394880 date "2019-11-01" @default.
- W2953394880 modified "2023-10-15" @default.
- W2953394880 title "Seasonal effects of additional HONO sources and the heterogeneous reactions of N2O5 on nitrate in the North China Plain" @default.
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