Figure 1 –

Density scatter plot of the annual predicted O₃ levels versus measured levels for the ensemble model.

Note 1: We regressed annual averaged predicted O₃ from ensemble model against annual averaged monitored O₃ using a GAM model with spline on the monitored O₃. Blue color represents 95% confidence interval.

Note 2: “n_neighbors” represents the density of points (O₃ sites) of the scatter plot.