Fig. 3: Composition and temporal evolution of SOA factors.
From: Online molecular insights into sources and formation of organic aerosol in Shanghai

Mass spectra a and time series b of the six identified SOA factors, including NO3SOA, Photochemical SOA1, Photochemical SOA2, Aged BBOA1, Aged BBOA2, and Biomass Burning Aqueous SOA (BB aqSOA).