Fig. 2: Distributions of three ratio quantities (OAN/ON, ON/OC, and OA/OC) and the resultant OAN/OA.
From: New measurements reveal a large contribution of nitrogenous molecules to ambient organic aerosol
The OAN/ON distribution is obtained by reviewing available studies on OAN constitutes and then Monte Carlo simulation (A). The ON/OC distribution is from measurements of 600+ aerosol samples, shown in grey bars in (B). The OA/OC values are constrained in the range of 1.3–2.5 and assumed to follow a log-normal distribution (C). The resultant OAN/OA ratio is obtained based on Monte Carlo simulation of the constrained distributions of OAN/ON, ON/OC, and OA/OC (D).
