Figure 2.

Modelled average concentrations of oxides of nitrogen from stack and portal emissions (September – November 2003), and post hoc exposure zones. (Upper figure). --------(Black line) incremental period average NOx ug/m³ above averaged background. --------(Green line) topographic contours. T1, U1, X1, T3, CBMS – Air monitoring stations. Red dots – Stack and portal locations.