Estimated contributions to total organic aerosol from particle-phase
tracers and statistical factors attributed to the oxidation of isoprene (red;
IEPOX-SOA, 2-MTs+C5-alktriols+2-MG), monoterpene (purple; MT filter
tracers), and sesquiterpene (green; SQT filter tracers). 2-MTs: 2-methyl
tetrols, 2-MG: 2-methylglyceric acid, C5-alktriols:
C5-alkene triols. Local nighttime hours indicated in grey.