Fig. 2: Variations in mass concentrations for particulate organic nitrates.
From: Comparative analysis of methods for seasonal particulate organic nitrate estimation in urban areas
Time series of particulate organic nitrates (NO3–,org) are obtained by NOx+(NO+/NO2+) ratio, PMF, and ME2 methods in a spring, b summer, and c autumn in Shanghai. The green circles, yellow boxes, and red lines represent concentrations obtained by the NOx+(NO+/NO2+) ratio, PMF, and ME2 methods in three seasons in Shanghai.
