Table 1.

Statistic of model performance in simulating surface concentrations of gaseous and particle species.

			obs	sima	N	MB	NMB	Δsimb
			(μg/m3)	(μg/m3)	(pairs)	(μg/m3)	(%)	(μg/m3)	(%)
Gas	NO2	CN-AQI	31.8	9.3	17466	−22.5	−71.9	−0.12	−1.3%
		EU-AIRBASE	22.8	5.2	2976	−17.6	−77.2	−0.20	−3.8%
		EU-EMEP	1.6	3.7	502	2	118.5	−0.21	−5.8%
		US-AQS	8.5	3.2	407	−5.3	−62.7	−0.03	−1.0%
	SO2	CN-AQI	26.1	10.5	17491	−15.6	−62.0	−0.0039	−0.04%
		EU-AIRBASE	4.9	1.3	1664	−3.6	−73.7	−0.0004	−0.03%
		EU-EMEP	0.3	1	494	0.7	213.5	0.0005	0.05%
		US-AQS	1.2	0.3	430	−0.9	−71.9	−6.00E-05	−0.02%
	O3	CN-AQI	55.9	74.2	17443	18.3	39.8	5.09	6.80%
		EU-AIRBASE	54	63.8	2047	9.8	18.2	8.15	12.80%
		EU-EMEP	70.4	63.3	704	−7.1	−9.1	8.48	13.40%
Particles	PM2.5	CN-AQI	52.1	37.4	17420	−14.8	−29.4	0.24	0.70%
	NO3−	EU-EMEP	0.4	2.3	261	2	579.6	0.17	7.70%
		US-IMPROVE	0.3	0.6	1800	0.2	43.5	0.03	5.60%
	SO42−	EU-EMEP	0.5	1	254	0.5	108.2	−0.0030	−0.3%
		US-IMPROVE	0.8	0.6	1800	−0.2	−22.2	−0.0011	−0.2%
	NH4+	EU-EMEP	0.5	1.1	266	0.5	92.4	0.04	3.80%

^a.sim – the simulated concentrations in Sim-base, annual mean.

^b.Δsim – represent the impacts of STE, derived from the differences in between Sim-Base and Sim-noSTE.