Figure 1From: Associations between ozone and morbidity using the Spatial Synoptic Classification system Daily maximum 1-hour ozone concentrations (during the ozone season, April-September) for (a) Asheville, (b) Charlotte, (c) Greensboro, (d) Raleigh, and (e) Wilmington. The solid line represents a simple natural spline smoother to highlight the overall trend.Back to article page