Fig. 5: Mass concentrations and fractional contributions of 14 ON source factors during the measurement period. | npj Clean Air

Fig. 5: Mass concentrations and fractional contributions of 14 ON source factors during the measurement period.

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

Fig. 5

a Box plots showing the distributions of ON mass concentrations for the 14 source factors. Square markers and horizontal lines in the boxes indicate the mean and median values, respectively; boxes represent the 25th and 75th percentiles, and whiskers represent 10th and 90th percentiles. b Percentage contributions of individual source factors to ON in PM2.5. c ON mass concentrations and corresponding fractional contributions of the 14 source factors to the total aerosol ON.

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