Table 4. Comparisons of Simulated and Observed Particulate Matter Concentrations From the IMPROVE Database Over the Eastern United States (East of 95degreesW)a

Sites	Elevation, m	Latitude, degreesN	Longitude, degreesW	1.37 x [SO42-]	1.29 x [NO3-]	BC	Obs. OA	OA Sim. POA	Sim. SOA
				Obs.	Sim.	Obs.	Sim.	Obs.	Sim.			
Acadia National Park, ME	150	44.4	68.3	2.55	2.38	0.41	0.28	0.21	0.44	1.32	1.57	0.36
Boundary Waters Canoe Area, MN	523	47.9	91.5	1.84	1.42	0.66	0.65	0.17	0.18	1.55	0.88	0.35
Breton, LA	2	29.1	89.2	4.30	2.52	0.61	0.01	0.3	0.18	1.35	1.58	1.04
Brigantine National Wildlife Refuge, NJ	5	39.5	74.4	5.99	4.53	1.25	0.40	0.46	1.03	2.54	2.44	0.39
Chassahowitzka National Wildlife, FL	2	28.7	82.6	4.12	2.47	0.53	0.01	0.46	0.18	2.45	2.13	1.06
Dolly Sods/Otter Creek Wilderness, WV	1158	39.1	79.4	6.04	5.86	0.59	0.48	0.32	0.77	2.09	2.41	0.66
Everglades National Park, FL	3	25.4	80.7	2.89	1.19	0.49	0.00	0.28	0.13	2.24	0.63	0.12
Great Gulf Wilderness, NH	445	44.3	71.2	2.64	2.38	0.25	0.28	0.2	0.44	1.48	1.57	0.36
Great Smoky Mountains National Park, TN	815	35.6	83.9	5.75	4.32	0.58	0.37	0.38	0.47	2.61	1.57	0.86
Isle Royale National Park, MI	186	47.5	88.1	1.97	1.42	0.77	0.65	0.18	0.18	1.31	0.88	0.35
James River Face, VA	299	37.6	79.5	6.36	4.16	0.83	0.13	0.54	0.51	2.94	1.64	0.69
Linville Gorge, NC	986	36.0	81.9	5.25	4.16	0.37	0.13	0.36	0.51	2.29	1.64	0.69
Lye Brook Wilderness, VT	1006	43.1	73.1	3.21	2.60	0.54	0.80	0.23	0.56	1.51	1.72	0.43
Mammoth Cave National Park, KY	248	37.1	86.1	6.26	4.32	1.54	0.37	0.43	0.47	2.74	1.57	0.86
Mingo, MO	112	37.0	90.1	5.21	3.84	1.72	0.57	0.48	0.38	3.17	1.32	0.85
Moosehorn NWR, ME	94	45.1	67.3	2.49	1.85	0.36	0.08	0.26	0.18	1.61	0.65	0.25
Okefenokee National Wildlife Refuge, GA	49	30.7	82.1	4.48	2.92	0.49	0.03	0.4	0.27	3.42	1.11	0.38
Cape Romain National Wildlife Refuge, SC	3	33.0	79.7	4.60	2.92	0.52	0.03	0.35	0.27	2.36	1.11	0.38
Seney, MI	216	46.3	85.9	2.69	1.88	1.06	0.40	0.2	0.2	1.48	0.80	0.25
Shenandoah National Park, VA	1098	38.5	78.4	5.99	5.86	0.99	0.48	0.33	0.77	1.83	2.41	0.66
Shining Rock Wilderness, NC	1621	35.4	82.8	4.48	4.32	0.34	0.37	0.21	0.47	1.75	1.57	0.86
Sipsey Wilderness, AL	279	34.3	87.3	5.71	4.32	0.99	0.37	0.45	0.47	3.11	1.57	0.86
Swanquarter, NC	2	35.5	76.2	4.52	3.27	0.55	0.05	0.25	0.35	1.76	0.98	0.23
Upper Buffalo Wilderness, AR	723	35.8	93.2	3.75	2.64	1.12	0.84	0.29	0.27	2.40	0.95	0.71
Virgin Islands National Park, VI	64	18.3	64.8	1.05	2.03	0.18	0.01	0.09	0.03	0.30	0.05	0.00
Voyageurs National Park 2, MN	429	48.4	92.8	1.59	1.25	0.76	0.86	0.17	0.17	1.58	0.80	0.29
Washington, DC	16	38.9	77.0	6.96	4.53	1.88	0.40	0.83	1.03	3.54	2.44	0.39

aConcentrations are in microng m-3. Obs., observed; Sim., simulated.