Skip to main content
. Author manuscript; available in PMC: 2022 Dec 16.
Published in final edited form as: Atmos Chem Phys. 2021 Dec 16;21(24):18247–18261. doi: 10.5194/acp-21-18247-2021

Figure 1.

Figure 1.

Treatment of OA chemistry in the CMAQv5.3.2+VCP model. The thick black box surrounds all aerosol-phase species. All smaller black boxes depict species undergoing gas-phase oxidation from VOCs to semivolatile or nonvolatile SOA species. Orange font depicts the VBS model for S/IVOCs. Red font depicts particle-phase accretion reactions while purple font depicts particle-phase hydrolysis reactions. Green font represents heterogeneous processes. Blue font shows cloud-processed aerosol and yellow font shows aerosol water associated with the organic phase. Gray boxes are nonvolatile primary organic aerosol (POA) species. Double-sided arrows represent reversible processes and one-sided arrows represent irreversible processes. Dashed lines represent processes that are dependent on relative humidity. The diagram includes the AERO7 mechanism plus the three VCP-forming pathways specific to this work (thick boxes in red). See AE7I Species Table (2016/2021) for species descriptions.