Fig. 5.

Angle comparison. Scatter plot of the angle of ${\overrightarrow{\mathbf{W}}}_i$ in each cell i respect to the positive horizontal axis measured from the data Θ_emp and compared with the models prediction Θ_mod. The gray dashed lines correspond to the diagonals. The domain of the empirical angles is (−π, π], while for Θ_mod we seek to minimize the distance to the empirical value by considering the original angle and its shifts in ±2π. In a, the comparison is performed in London and in b it is for the Paris case. R-squares for London are $R_{\mathrm{P}}^2\left(\mathrm{gravity}\right)=0.96$ and $R_{\mathrm{P}}^2\left(\mathrm{radiation}\right)=0.70$. For Paris, they are $R_{\mathrm{P}}^2\left(\mathrm{gravity}\right)=0.96$ and $R_{\mathrm{P}}^2\left(\mathrm{radiation}\right)=0.80$