Bell et al  Climate Change 2007
Average number of of days per summer for each
city that exceed the 8-h ozone NAAQS
Average number of exceedence days per summer for each city for the 8-h ozone NAAQS. The blue bars represent the average number of exceedence days prt summer for the current climate, whereas the red bars represent the additional number of exceedence days  that would occur under the projected future climate scenario