Table 3.

Statistical scores calculated by comparison between surface observations for several stations in Europe and the corresponding model daily mean value, for the simulations REF and CVD. RMSE and bias are in μg m⁻³ and Pearson's temporal correlation between −1 and 1. Statistical scores are presented for NO₂, O₃, PM_2.5 and PM₁₀.

	REF			CVD
	RMSE	Bias	Rt	RMSE	Bias	Rt
NO2
All	20.77	−14.43	0.37	22.35	−17.63	0.43
Rural	8.16	−3.68	0.35	8.74	−5.10	0.37
Suburban	20.86	−14.06	0.37	22.10	−17.20	0.44
Urban	25.96	−20.53	0.38	27.92	−23.42	0.46
O3
All	15.53	2.59	0.29	15.59	2.21	0.26
Rural	14.96	0.31	0.25	15.16	−0.07	0.23
Suburban	15.52	2.65	0.28	15.67	2.31	0.25
Urban	15.89	4.01	0.31	16.07	3.66	0.28
PM25
All	6.31	−0.24	0.70	6.34	−0.77	0.70
Rural	5.97	1.27	0.70	5.74	0.80	0.70
Suburban	7.66	0.65	0.68	7.18	0.02	0.66
Urban	6.21	−1.36	0.70	6.41	−2.08	0.71
PM10
All	9.50	−5.47	0.69	9.89	−6.07	0.69
Rural	8.37	−3.46	0.67	8.39	−4.20	0.67
Suburban	10.08	−5.19	0.67	10.48	−5.88	0.68
Urban	9.68	−6.28	0.71	10.27	−7.02	0.71