Table 1.
Variance explained for each predictive variable.
| Predictive Variable (Unit) | Variance Explained in the Univariate Model | Variance Explained in the Multivariate Model (without PM10) | Variance Explained in the Multivariate Model (Including PM10) |
|---|---|---|---|
| PM10 (g/m3) | 73.00% | - | 67.97% |
| Aerosol optical thickness (AOT) | 7.38% | 4.77% | 0.48% |
| Normalized difference vegetation index (NDVI) | 3.14% | 0.24% | 0.24% |
| Precipitation (kg/m2s) | 1.75% | 0.02% | 0.02% |
| Temperature (°C) | 1.08% | 2.62% | 0.48% |
| Mean specific humidity (kg/kg) | 9.08% | 0.48% | 0.48% |
| Roadway length within the 10 km buffer of a monitoring station (m) | 2.62% | 2.86% | 1.45% |
| Shortest distance of roadway to a monitoring station (m) | 1.73% | 2.15% | 1.21% |
| Wind speed vector | 3.76% | 1.43% | 0.48% |
| Area proportion of the factories and mines, oil fields and stone-pit land-use | 2.29% | 2.15% | 0.73% |
| Area proportion of the forest land-use | 2.06% | 2.62% | 0.48% |
| Number of the emission plants | 4.48% | 1.67% | 0.97% |
| Shortest distance to the emission plants | 1.70% | 1.67% | 0.24% |
| The first temporal basis function | 37.00% | 26.71% | 4.84% |
| The second temporal basis function | 5.79% | 1.43% | 0.48% |
| Time (day of year) | 14.70% | 2.38% | 0.73% |
| Total | 53.20% | 81.30% |