Figure 2
(a) N4–20 versus volume concentration of particles <500 nm; (b) distribution of rBC number concentrations.
a) One-hour averaged N4–20 versus total volume concentration of particles <500 nm: all data points with measured rBC for June-September (JJAS; 1402 pink dots); JJAS data points with rBC <0.71 cm-3 (709 green points; subset of the pink dots); data points from all other months (1534 blue dots). b) Distribution of hours with indicated equal interval rBC number concentrations up to 2 cm-3: black bars represent the complete year; green bars represent JJAS only. Median rBC number concentrations for JJAS and the entire year are 0.71 cm-3 and 3.37 cm-3 respectively; 33% and 60% of rBC number concentrations are >2 cm-3 for JJAS and the entire year respectively.
