Table 2:
EnKF Forcing and State Perturbations (50 ensemble members).
| Variable | Perturbation Type | Std. Dev. | Cross-Correlations | ||
|---|---|---|---|---|---|
| Forcings | SW | LW | Precip | ||
| Shortwave Radiation | Multiplicative | 0.3 | 1.0 | -0.5 | -0.8 |
| Longwave Radiation | Additive | 50 Wm−2 | -0.5 | 1.0 | 0.5 |
| Precipitation | Multiplicative | 0.5 | -0.8 | 0.5 | 1.0 |
| Soil Moisture States | Layer 1 | Layer 2 | Layer 3 | Layer 4 | ||
|---|---|---|---|---|---|---|
| Layer 1 (5 cm) | Additive | 6 × 10−3 m3m−3 | 1.0 | 0.6 | 0.4 | 0.2 |
| Layer 2 (10 cm) | Additive | 1.1 × 10−4 m3m−3 | 0.6 | 1.0 | 0.6 | 0.4 |
| Layer 3 (35 cm) | Additive | 6 × 10−6 m3m−3 | 0.4 | 0.6 | 1.0 | 0.6 |
| Layer 4 (150 cm) | Additive | 4 × 10−6 m3m−3 | 0.2 | 0.4 | 0.6 | 1.0 |