Table 1.
Empirical weights of the five meteorological covariates (without cumulative precipitation) in the top four layers of the classification trees in the entire region (36 sites) and three subregions for the winter of 2016. Meteorological covariates used are DEW, CWS, temperature (TEM), WD and pressure (PRE). For each covariate and each layer of a tree, the weight are obtained by the ratios of the numbers of monitoring sites where the covariate appears in the layer to the number of all monitoring sites available in the region.
| empirical weight |
empirical weight |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| region | layer | DEW | WD | CWS | PRE | TEM | region | layer | DEW | WD | CWS | PRE | TEM |
| entire | 1 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | north | 1 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 2 | 0.44 | 0.50 | 0.04 | 0.02 | 0.00 | 2 | 0.56 | 0.33 | 0.00 | 0.11 | 0.00 | ||
| 3 | 0.16 | 0.00 | 0.34 | 0.29 | 0.21 | 3 | 0.21 | 0.00 | 0.07 | 0.43 | 0.29 | ||
| 4 | 0.28 | 0.02 | 0.11 | 0.31 | 0.28 | 4 | 0.33 | 0.11 | 0.11 | 0.22 | 0.23 | ||
| central | 1 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | south | 1 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 2 | 0.40 | 0.54 | 0.06 | 0.00 | 0.00 | 2 | 0.50 | 0.50 | 0.00 | 0.00 | 0.00 | ||
| 3 | 0.11 | 0.00 | 0.47 | 0.25 | 0.17 | 3 | 0.33 | 0.00 | 0.17 | 0.17 | 0.33 | ||
| 4 | 0.32 | 0.00 | 0.13 | 0.30 | 0.25 | 4 | 0.00 | 0.00 | 0.00 | 0.50 | 0.50 | ||