Table 1.
The results of the principal component analysis of the 19 bioclimatic variables extracted from the areas of South Korea. The first three PCs with eigenvalue lager than one were represented here. The percentages in parentheses indicate the amount of variation explained by each PC, and the components that were loaded most highly for each parameter are in bold
| Variables | PC1 (56.1%) | PC2 (23.4%) | PC3 (12.1%) | |
|---|---|---|---|---|
| Bio1 | Annual mean temperature | −0.26 | −0.22 | 0.17 |
| Bio2 | Mean diurnal range | 0.26 | −0.13 | −0.14 |
| Bio3 | Isothermality | 0.14 | −0.08 | −0.26 |
| Bio4 | Temperature seasonality | 0.29 | −0.12 | 0.01 |
| Bio5 | Max temperature of warmest period | −0.10 | −0.41 | 0.20 |
| Bio6 | Min temperature of coldest period | −0.30 | −0.05 | 0.10 |
| Bio7 | Temperature annual range | 0.29 | −0.13 | −0.03 |
| Bio8 | Mean temperature of wettest quarter | −0.16 | −0.37 | 0.19 |
| Bio9 | Mean temperature of driest quarter | −0.29 | −0.05 | 0.14 |
| Bio10 | Mean temperature of warmest quarter | −0.16 | −0.36 | 0.24 |
| Bio11 | Mean temperature of coldest quarter | −0.29 | −0.10 | 0.11 |
| Bio12 | Annual precipitation | 0.01 | 0.32 | 0.45 |
| Bio13 | Precipitation of wettest period | 0.25 | 0.05 | 0.36 |
| Bio14 | Precipitation of driest period | −0.20 | 0.31 | −0.04 |
| Bio15 | Precipitation seasonality | 0.28 | −0.14 | 0.18 |
| Bio16 | Precipitation of wettest quarter | 0.20 | 0.17 | 0.43 |
| Bio17 | Precipitation of driest quarter | −0.22 | 0.30 | 0.01 |
| Bio18 | Precipitation of warmest quarter | 0.22 | 0.14 | 0.40 |
| Bio19 | Precipitation of coldest quarter | −0.22 | 0.30 | 0.02 |
| Eigenvalue | 10.7 | 4.5 | 2.3 |
Total explanation power 91.7%.