Table 2.

Summary statistics for source-specific PM_2.5 concentrations, Atlanta, Georgia, August 1, 1998 - December 23, 2010^a

Source	Minimum μg/m3	Median μg/m3	Mean μg/m3	Maximum μg/m3	Standard deviation	Interquartile range width	Correlation between ensemble runs b
Biomass burning	0.000 (0.000)	1.877(0.019)	2.737(0.012)	32.103(5.933)	2.642(0.051)	2.689(0.030)	0.747
Primary coal combustion	0.000 (0.000)	0.097(0.001)	0.134(0.002)	1.687(0.273)	0.138(0.003)	0.138(0.002)	0.722
Dust/resuspended soil	0.000 (0.000)	0.250(0.001)	0.373(0.001)	9.378(1.562)	0.474(0.010)	0.248(0.002)	0.976
Diesel vehicles	0.000 (0.000)	0.883(0.012)	1.142(0.009)	12.343(1.259)	1.089(0.020)	1.091(0.015)	0.741
Gasoline vehicles	0.008 (0.009)	0.694(0.010)	0.858(0.004)	10.534(0.884)	0.759(0.007)	0.706(0.009)	0.783
Secondary organic carbon	0.000 (0.000)	1.453(0.012)	1.727(0.007)	27.578(1.071)	1.681(0.011)	2.097(0.032)	0.745

Results presented as mean(standard deviation)

^aAveraged across 10 ensemble runs.

^bMean Spearman correlation calculated from all pairwise runs

For comparison, the distribution of total PM_2.5, in μg/m, is: minimum 1.060, median 13.970, mean 15.473, maximum 72.560, standard deviation 7.936, interquartile range 9.915.