Table 1.
Descriptive Statistics Summarizing Observations for PM2.5 Monitoring Sites for Year 2007
| Variable | Mean | SD | Min | Max |
|---|---|---|---|---|
| PM2.5 (µg/m3) | 13.67 | 7.70 | 2.00 | 145.00 |
| Relative humidity (%)a | 49.81 | 11.75 | 18.74 | 86.83 |
| Wind speed (m/s)a | 3.85 | 2.02 | 0.05 | 15.11 |
| Forest cover 2006b | 0.11 | 0.14 | 0.00 | 0.79 |
| Road length (m)b | 2072.00 | 375.69 | 0.00 | 137.00 |
| Elevation (m)b | 165.97 | 150.89 | −1.67 | 981.25 |
| Point emissions 2008 (t/yr)b | 2.75 | 15.81 | 0.00 | 138.21 |
| AODa | 0.28 | 0.25 | 0.00 | 1.95 |
| Fire countc | 1.41 | 3.36 | 0.00 | 91.00 |
a
Nearest neighbor.
b
Within a 1 × 1 km2 square buffer.
c
Within a buffer with a radius of 75 km.