Comparison of WRF-Chem and InMAP performance in predicting annual average observed particulate SO₄ concentrations.

<p>The background colors in the maps represent predicted concentrations, and the colors of the circles on the maps represent the difference between modeled and measured values at measurement locations. Abbrevations: MFB = mean fractional bias; MFE = mean fractional error; MB = mean bias; ME = mean error; MR = model ratio; <i>S</i> = slope of regression line; <i>R</i>² = squared Pearson correlation coefficient.