Fig. 3.

Spatial chemical regimes based on a 10% emission reduction of the ${\mathrm{N}\mathrm{H}}_3$, ${\mathrm{N}\mathrm{O}}_{\mathrm{x}}$ and ${\mathrm{S}\mathrm{O}}_2$$\mathrm{P}\mathrm{M}$ precursors. In yellow to green ${\mathrm{N}\mathrm{H}}_3$-sensitive, in light to dark blue ${\mathrm{N}\mathrm{O}}_{\mathrm{x}}$-sensitive and in orange to red ${\mathrm{S}\mathrm{O}}_2$-sensitive. For each pollutant, the color scale differentiates different levels according to the difference between the top and second ranked potential impacts among the three precursors. The levels 1.1, 1.2, 1.5 and 2 correspond to differences of 10, 20, 50 and 100%, respectively.