Figure 15: Ozone (O₃) concentrations simulated with the WRF-Chem model, showing the interaction between the Mexico City pollution plume with regional biomass burning and biogenic emissions. Upper panel shows the O₃ resulting from urban emission only. Middle panel includes effects adding biomass burning emissions, which contribute NO_x in the NO_x-limited regime (far-field, ca. 200-300 km). Lower panel adds biogenic emissions, which contribute hydrocarbons in the hydrocarbons-limited regime (near-field, 50-150 km).