Figures 4.10 and 4.11

Figure 4.10. (Left Column) Ozone concentrations at the summit and base of Mount Washington (measured by the AMC) and Portsmouth, NH (measured by NH Department of Environmental Services), during a high ozone event. Concentrations dropped during the night in Portsmouth and at the base of the mountain, but remained high at the summit.
Figure 4.11. (Right Column) Ozone concentrations at the summit and base of Mount Washington (measured by the AMC) and Portsmouth, NH (measured by NH DES) showing a high ozone event on the summit of Mount Washington while ozone concentrations at the base of the mountain and in Portsmouth, NH, remained low.