The effects of these ocean emissions of biogenic benzene and toluene on atmospheric chemistry were assessed using a global chemistry-climate model (CAM-Chem (39)). Table shows simulated atmospheric mole fractions of benzene, toluene, and OH in the three simulation cases (noBT, avgBT, and maxBT; Table ), along with the changes between cases. Adding our mean measured benzene and toluene ocean flux to the model increased benzene and toluene atmospheric mole fractions by 1.7-3.2 pmol mol -1 with respect to the noBT case where there is no oceanic efflux and polar airborne benzene and toluene result from long-distance transport alone. Due to the low simulated background concentrations, the contribution of oceanic emissions represents a 12 % (benzene) and 100 % (toluene) increase in the Arctic, and as much as a 3-(benzene) and 30-(toluene) fold increase in the Southern Ocean. The model results compare well with our Southern Ocean observations of 14 ± 17 pmol mol -1 benzene, while toluene mole fractions were below the LOD. The air mole fractions modelled for the Arctic in the noBT case were within 7 pmol mol -1 of the ones used to compute the flux and saturations, which is reassuring.