Fig. 1: Secondary organic aerosol (SOA) mass yield (YSOA) vs. organic mass (Mo).
From: Non-linear effects of secondary organic aerosol formation and properties in multi-precursor systems
YSOA as a function of Mo for a α-pinene+NO3· system from pure α-pinene (APN), sequential oxidation (SEQ), simultaneous oxidation (MIX) experiments and for b limonene+NO3· system from pure limonene (LIM), SEQ, and MIX experiments. LIM (oxidant-first) refers to the experiment where N2O5 was first injected into the chamber and followed by the injection of limonene, resembling the limonene oxidation condition in the SEQ experiment. Ideal mixing refers to the assumption of the condition where α-pinene and limonene SOA are ideally mixed (thus Mo is the total SOA mass concentration), whereas phase separation refers to the assumption of the condition where α-pinene and limonene SOA are phase-separated (thus Mo is the individual SOA mass concentration). SOA mass yield curves are derived from the volatility basis set (VBS) yield-fitting method (thick solid line; using three data points at varying Mo) as well as the volatility distribution via thermogram analysis combined with the yield data points from APN and LIM experiments (thin solid line). Error bars for Mo represent the combined uncertainty of a scanning mobility particle sizer (SMPS) and SOA density. Error bars for YSOA are calculated by the standard propagation of error.
