Table 2. Soil moisture anomalies during high-temperature case (highest 5 years) and low-precipitation case (lowest 5 years) events depending on permafrost types.
* indicates significance at the 95% confidence level based on the bootstrap method. In the bootstrap method, to get probabilistic density function, random resampling is repeated 10,000 times from the observed data.
|
April soil moisture anomaly (m2 m−2) |
Continuous and discontinuous permafrost (>50%) |
Sporadic permafrost (10–50%) |
Isolated permafrost (0–10%) |
Nonpermafrost |
| Composite of February to March high-temperature case |
−6.83 × 10−3 (P = 0.05*) | −8.25 × 10−3 (P = 0.04*) | −8.54 × 10−3 (P = 0.06) | −3.27 × 10−3 (P = 0.19) |
| Composite of February to March low-precipitation case |
−0.38 × 10−3 (P = 0.49) | −4.53 × 10−3 (P = 0.16) | −1.19 × 10−3 (P = 0.37) | −0.39 × 10−3 (P = 0.45) |