Table 4.

(a) NMB for MDA8 ozone at AQS sites for BASE, BC H-CMAQ, BC GEOS-Chem, and BC AM3. See the legend for Table 3 for a description on how the metrics were computed and for a definition of how different fonts are used in this table. (b) NME for MDA8 ozone at AQS sites for BASE, BC H-CMAQ, BC GEOS-Chem, and BC AM3. See the legend for Table 3 for a description on how the metrics were computed and for a definition of how different fonts are used in this table. (c) R for MDA8 ozone at AQS sites for BASE, BC H-CMAQ, BC GEOS-Chem, and BC AM3. See the legend for Table 3 for a description on how the metrics were computed and for a definition of how different fonts are used in this table.

(a)		All	NW	IMW	MW	SE	NE
Spring	BASE	2.1	9.1	3.6	2.0	2.6	− 3.2
	BC H-CMAQ	5.3	10.3	5.2	5.0	5.8	0.7
	BC GEOS-CHEM	2.1	8.9	1.0	2.5	3.3	− 1.7
	BC AM3	18.6	31.6	23.4	18.2	14.8	16.2
Summer	BASE	6.8	13.5	−3.2	6.3	9.6	2.6
	BC H-CMAQ	8.8	11.8	2.0	7.5	12.4	3.2
	BC GEOS-CHEM	7.5	8.9	−1.2	6.7	11.1	2.8
	BC AM3	11.4	23.0	2.9	10.6	12.1	8.4
Fall	BASE	3.1	13.0	2.1	1.0	2.1	1.7
	BC H-CMAQ	9.2	18.4	8.7	7.1	7.7	8.8
	BC GEOS-CHEM	6.3	15.9	5.0	5.0	4.7	6.3
	BC AM3	13.3	30.4	12.3	13.7	10.7	15.1
Winter	BASE	−5.1	11.0	− 2.8	− 23.1	− 7.3	− 28.2
	BC H-CMAQ	11.3	27.2	9.2	3.5	12.1	1.3
	BC GEOS-CHEM	2.2	16.6	3.3	−8.3	1.2	− 12.9
	BC AM3	18.4	36.4	19.6	13.5	17.9	12.1
(b)		All	NW	IMW	MW	SE	NE
Spring	BASE	11.3	13.1	8.5	11.3	11.3	12.0
	BC HEMI	12.1	13.3	10.6	11.9	11.7	11.6
	BC GEOS	11.1	13.6	8.6	11.2	11.1	11.2
	BC AM3	20.2	31.6	23.7	20.1	17.1	18.9
Summer	BASE	13.6	16.2	10.5	13.3	14.7	12.0
	BC HEMI	14.9	15.4	11.4	14.6	16.3	13.2
	BC GEOS	14.0	13.9	10.8	13.6	15.4	12.3
	BC AM3	16.0	24.7	13.8	15.2	16.1	13.8
Fall	BASE	13.5	20.8	9.4	12.1	11.7	14.4
	BC HEMI	15.2	22.0	12.2	14.2	13.2	16.1
	BC GEOS	14.3	20.6	10.0	13.7	12.7	15.9
	BC AM3	17.9	30.5	14.5	18.1	14.6	20.0
Winter	BASE	18.8	20.5	19.2	28.8	12.0	29.1
	BC HEMI	17.4	30.5	18.0	15.9	15.1	14.4
	BC GEOS	15.8	21.3	17.0	19.0	11.0	16.8
	BC AM3	21.2	38.7	22.7	18.0	19.4	15.5
(c)		All	NW	IMW	MW	SE	NE
Spring	BASE	0.75	0.57	0.66	0.8	0.82	0.74
	BC HEMI	0.72	0.59	0.55	0.8	0.82	0.72
	BC GEOS	0.74	0.57	0.62	0.81	0.83	0.75
	BC AM3	0.63	0.45	0.6	0.65	0.77	0.59
Summer	BASE	0.73	0.78	0.67	0.7	0.72	0.82
	BC HEMI	0.72	0.78	0.67	0.68	0.71	0.8
	BC GEOS	0.70	0.78	0.66	0.68	0.68	0.81
	BC AM3	0.71	0.64	0.56	0.69	0.72	0.79
Fall	BASE	0.82	0.72	0.74	0.84	0.81	0.87
	BC HEMI	0.80	0.71	0.72	0.81	0.81	0.86
	BC GEOS	0.80	0.71	0.74	0.81	0.79	0.86
	BC AM3	0.77	0.67	0.59	0.75	0.8	0.83
Winter	BASE	0.65	0.57	0.6	0.75	0.76	0.69
	BC HEMI	0.67	0.71	0.63	0.75	0.71	0.7
	BC GEOS	0.67	0.68	0.64	0.77	0.75	0.71
	BC AM3	0.68	0.71	0.64	0.78	0.72	0.73