International Scholarly Research Notices

Research Article

Evaluating the Performance of a Regional-Scale Photochemical Modelling System: Part I—Ozone Predictions

Table 4

Summary statistics corresponding to air-quality stations associated with air-quality simulations of ozone concentration for summer 2009 and summer 2010 with different cut-off values.


Values/year	Statistic	20 gm⁻³	30 gm⁻³	40 gm⁻³	50 gm⁻³	60 gm⁻³

Hourly/2009	MB (gm⁻³)	−4.77	−7.39	−10.10	−12.94	−15.97
	MAGE (gm⁻³)	21.07	20.39	20.11	20.36	21.25
	MNBE (%)	7.20	−1.20	−7.06	−11.52	−15.22
	MNGE (%)	35.17	28.48	24.74	22.86	22.31
	RMSE (gm⁻³)	26.22	25.57	25.45	25.88	26.84
	UPA (%)	—	—	—	—	—
	IOA	0.674	0.661	0.640	0.607	0.569

Hourly/2010	MB (gm⁻³)	−10.01	−12.13	−14.32	−16.58	−18.89
	MAGE (gm⁻³)	22.76	22.64	22.74	23.18	23.97
	MNBE (%)	−4.40	−10.21	−14.18	−17.09	−19.27
	MNGE (%)	36.11	31.40	28.53	26.84	25.90
	RMSE (gm⁻³)	28.95	28.98	29.32	29.98	30.92
	UPA (%)	—	—	—	—	—
	IOA	0.694	0.671	0.641	0.603	0.558

1 h maximum/2009	MB (gm⁻³)	−14.92	−15.02	−15.11	−15.48	−16.14
	MAGE (gm⁻³)	23.98	23.93	23.90	23.86	23.87
	MNBE (%)	−10.30	−10.61	−10.82	−11.44	−12.35
	MNGE (%)	22.49	22.22	22.07	21.72	21.37
	RMSE (gm⁻³)	29.78	29.71	29.69	29.67	29.69
	UPA (%)	−17.47	−17.47	−17.47	−17.47	−17.47
	IOA	0.570	0.572	0.571	0.566	0.560

1 h maximum/2010	MB (gm⁻³)	−15.60	−15.68	−15.87	−16.19	−16.76
	MAGE (gm⁻³)	23.58	23.54	23.50	23.46	23.49
	MNBE (%)	−11.21	−11.49	−11.89	−12.43	−13.20
	MNGE (%)	21.99	21.74	21.47	21.17	20.88
	RMSE (gm⁻³)	30.60	30.53	30.51	30.49	30.57
	UPA (%)	0.30	0.30	0.30	0.30	0.30
	IOA	0.589	0.590	0.586	0.583	0.576

8 h maximum/2009	MB (gm⁻³)	−11.04	−11.46	−11.98	−12.83	−14.24
	MAGE (gm⁻³)	20.21	20.02	19.87	19.72	19.73
	MNBE (%)	−6.17	−7.58	−8.78	−10.26	−12.24
	MNGE (%)	23.08	21.88	21.02	20.19	19.50
	RMSE (gm⁻³)	24.96	24.71	24.53	24.34	24.41
	UPA (%)	−16.44	−16.44	−16.44	−16.44	−16.44
	IOA	0.773	0.779	0.788	0.801	0.825

8 h maximum/2010	MB (gm⁻³)	−11.52	−11.87	−12.32	−13.09	−14.31
	MAGE (gm⁻³)	20.00	19.88	19.78	19.73	19.83
	MNBE (%)	−7.51	−8.62	−9.58	−10.88	−12.51
	MNGE (%)	22.23	21.34	20.69	20.01	19.49
	RMSE (gm⁻³)	25.35	25.19	25.10	25.09	25.27
	UPA (%)	−1.40	−1.40	−1.40	−1.40	−1.40
	IOA	0.780	0.784	0.789	0.799	0.820