[High-frequency Evolution of Urban Atmospheric Ammonia and Ammonium and Its Gas-to-Particle Conversion Mechanism in Nanjing City].

In this study, hourly mass concentrations of atmospheric gases (mainly NH) and secondary inorganic aerosols (mainly NH, NO, and SO) in Nanjing City were continuously measured during the fall of 2018 by an online gas and aerosol chemical component monitor. The dataset was used to investigate the variation characteristics of ambient NH and NH during polluted and non-polluted periods, and to explore the potential chemical mechanism during gas-to-particle conversion between NH and NH. The results show that throughout the sampling period, the mean values (±1) of the mass concentrations of NH and NH were (15.