Fig. 5
From: Air quality and health impacts of the 2020 wildfires in California
Comparison of observations and modeled concentrations for a daily maximum 8-h average of ozone and b daily average PM2.5. Diagonal shows the 1:1 modeled vs. observed ratio, and the vertical and horizontal lines show the National Ambient Air Quality Standards level for daily maximum 8-h average of ozone (70 ppb) and daily average PM2.5 (35 μg/m3). The true positive rate (TPR) is the ability of the model to detect exceedances compared to observations. The true negative rate (TNR) is the ability of the model to detect concentrations below the standard. The false negative rate (FNR) and the false positive rate (FPR) are the complementary values of TPR and TNR, respectively.