Fig. 2: Size distributions of organic and sulfate particles.
From: Fast sulfate formation from oxidation of SO2 by NO2 and HONO observed in Beijing haze
The Figure shows mass-based size distributions of (a) organic and (b) sulfate particles in Stages I and II of the December 16–22, 2016 haze event. M denotes mass and Dva denotes particle vacuum aerodynamic diameter. The measurements were made by the HR-AMS instrument with 50% size cut at 1-μm diameter, hence the data are shown as PM1 (particulate matter with less than 1-μm diameter). Mass modal diameters are shown as dotted lines.
