Articles | Volume 22, issue 18
Atmos. Chem. Phys., 22, 12629–12646, 2022
https://doi.org/10.5194/acp-22-12629-2022
Atmos. Chem. Phys., 22, 12629–12646, 2022
https://doi.org/10.5194/acp-22-12629-2022
Research article
28 Sep 2022
Research article | 28 Sep 2022

Seasonal modeling analysis of nitrate formation pathways in Yangtze River Delta region, China

Jinjin Sun et al.

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Short summary
NO3- has become the dominant and the least reduced chemical component of fine particulate matter in China. NO3- formation is mostly in the NH3-rich regime in the Yangtze River Delta (YRD). OH + NO2 contributes 60 %–83 % of the TNO3 production rates, and the N2O5 heterogeneous pathway contributes 10 %–36 %. The N2O5 heterogeneous pathway becomes more important in cold seasons. Local emissions and regional transportation contribute 50 %–62 % and 38 %–50 % to YRD NO3- concentrations, respectively.
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