Fig. 3: Histograms of PMF factors, inorganic nitrate, and organic nitrate in each factor with nitrate mass fraction for the surface and mountain site. | npj Climate and Atmospheric Science

Fig. 3: Histograms of PMF factors, inorganic nitrate, and organic nitrate in each factor with nitrate mass fraction for the surface and mountain site.

From: Enhanced formation of nitrogenous organic aerosols and brown carbon after aging in the planetary boundary layer

Fig. 3

a, b The circles and triangles indicate the median and mean values, the upper and lower boundaries indicate the 75th and 25th percentiles. c, d The distribution of inorganic nitrate and organic nitrate (presented as a normalized histogram) in each factor.

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