Fig. 6: The production rate of particulate nitrate from different pathways during the entire campaign, P1 and P2, respectively. | npj Clean Air

Fig. 6: The production rate of particulate nitrate from different pathways during the entire campaign, P1 and P2, respectively.

From: Role of N2O5 heterogeneous hydrolysis in summer nitrate formation in Beijing: insights from direct measurements and model simulations

Fig. 6

“Obs” refers to direct measurements of N2O5 and ClNO2 combined with box model calculations (dark blue), as well as the NO2 + OH radical reaction (bright blue). “Sim” represents GEOS-Chem simulations for N2O5 heterogeneous hydrolysis from the grid point corresponding to our observation site. The pie charts refer to the observed average contributions of N2O5 heterogeneous hydrolysis and the NO2 + OH radical reaction to total nitrate formation.

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