Figure 2
(a) Variations in PM10 concentrations measured near the surface (SFC) in Seoul (Songwol-dong) (grey bars) and at Mt. Gwan-ak (black bars) between March and May of 2016. (b) Distribution of PM10 concentration difference over time between the ground surface (Songwol-dong) and Mt. Gwan-ak in Seoul between March and May of 2016; the figure shows a percentile graph wherein the red dots represent 5/95 percent values, the error bars represent 10/90 percent values, and the grey boxes denote the 25–75 percentile ranges, wherein the black horizontal lines indicate 50 percentile values. (c) Number of cases in which the PM10 concentration difference over time between Seoul and Mt. Gwan-ak exceeded 50 μg m−3 between March and May of 2016.
