Fig. 6: Time series of meteorological conditions, ambient gases, PMF-resolved three major ON factors and their tracer species, and aerosol IN and ON concentrations (upper panels) and corresponding percentage contributions of individual source factors to ON (lower panels) during the five nitrogenous aerosol episodic cases. | npj Clean Air

Fig. 6: Time series of meteorological conditions, ambient gases, PMF-resolved three major ON factors and their tracer species, and aerosol IN and ON concentrations (upper panels) and corresponding percentage contributions of individual source factors to ON (lower panels) during the five nitrogenous aerosol episodic cases.

From: Molecular and elemental markers-based source apportionment of organic nitrogen in PM2.5 at a suburban site in Hong Kong

Fig. 6

BB = biomass burning, α-Pin = SOA α-pinene SOA tracers, Levo = levoglucosan. The yellow shades represent daytime periods.

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