Fig. 5: Variation of the secondary hydrophilic OPEs to Ox ratio ((hydrophilic-OPEs)sec/Ox) as a function of sulfur oxidation ratio (SOR) and δ13C of oxalic acid. | Nature Communications

Fig. 5: Variation of the secondary hydrophilic OPEs to Ox ratio ((hydrophilic-OPEs)sec/Ox) as a function of sulfur oxidation ratio (SOR) and δ13C of oxalic acid.

From: Aqueous secondary formation substantially contributes to hydrophilic organophosphate esters in aerosols

Fig. 5

a, b Correlations between (hydrophilic-OPEs)sec/Ox and SOR in winter and summer. c Relationships between (hydrophilic-OPEs)sec/Ox and δ13C of oxalic acid in winter and summer for Guangzhou, Chengdu, Wuhan, and Shanghai. The spots in (c) are colored by aerosol liquid water (ALW) concentrations. The mass concentrations of secondary hydrophilic OPEs were obtained from the positive matrix factorization (PMF) model results.

Back to article page