Table 1.
Comparison statistics between BG daily estimates and ground-based monitoring data in an eastern portion of the U.S., by year
| Concentration (unit) | Year | M | N | MAD (12 km grid) |
MAD (36 km grid) |
R (12 km grid) |
R (36 km grid) |
|---|---|---|---|---|---|---|---|
| PM2.5 (μg/m3) | 2001 | 813 | 113401 | 2.23 | 1.69 | 0.89 | 0.93 |
| PM2.5 (μg/m3) | 2002 | 899 | 127779 | 2.31 | 1.55 | 0.88 | 0.95 |
| PM2.5 (μg/m3) | 2003 | 894 | 117879 | 2.36 | 1.56 | 0.88 | 0.94 |
| PM2.5 (μg/m3) | 2004 | 833 | 116326 | 2.25 | 1.47 | 0.89 | 0.95 |
| PM2.5 (μg/m3) | 2005 | 860 | 111552 | 2.41 | 1.58 | 0.90 | 0.95 |
| PM2.5 (μg/m3) | 2006 | 807 | 105158 | 2.18 | 1.42 | 0.89 | 0.95 |
| Ozone (ppb) | 2001 | 790 | 195035 | 4.53 | 3.22 | 0.94 | 0.97 |
| Ozone (ppb) | 2002 | 856 | 223175 | 3.83 | 3.23 | 0.96 | 0.97 |
| Ozone (ppb) | 2003 | 873 | 226947 | 3.69 | 3.07 | 0.96 | 0.97 |
| Ozone (ppb) | 2004 | 896 | 232081 | 3.51 | 2.98 | 0.95 | 0.96 |
| Ozone (ppb) | 2005 | 883 | 230270 | 3.75 | 3.09 | 0.96 | 0.97 |
| Ozone (ppb) | 2006 | 887 | 227576 | 3.63 | 3.01 | 0.95 | 0.96 |
M: The number of monitoring sites; N: The number of records;
MAD: Mean absolute deviation; R: Correlation coefficient