Figure 3

Model fitting (a) and cross validation (b) of the Bayesian Gaussian processes model (N = 162,089). RMSE: root mean squared prediction error (µg/m3). For reference, the 1:1 line is shown as a dashed line.
Model fitting (a) and cross validation (b) of the Bayesian Gaussian processes model (N = 162,089). RMSE: root mean squared prediction error (µg/m3). For reference, the 1:1 line is shown as a dashed line.