Extended Data Figure 8: SOA production rate extrapolation.
From: Oil sands operations as a large source of secondary organic aerosols
a, Measured SOA for F1 extrapolated to one photochemical day. Total SOA production is the sum of scaled hourly SOA production rates (orange; see Supplementary Methods). The blue region represents the same scaling performed where only photolysis rate constants are varied in the model. Error bars represent a range of SOA estimates assuming ±20% on the initial OA estimates via the TERRA algorithm. b, Modelled dependence of OH radical concentration on the ozone photolysis frequency (JO1D). Further varying initial conditions for NOx, water vapour and isoprene in the model has a small effect on this relationship.
