Table 1 Trend and shift of indicated TC metric and index and when the influence of the PDO is reduced from their respective timeseries.
TC metrics | Period 1 | Period 2 | Difference (p-value) | Effect size | Sen’s slope (p-value) | ||
|---|---|---|---|---|---|---|---|
Power Dissipation Index (PDI) | Original | 0.16 | 0.22 | 0.06 (0.000) | −1.14 | 0.003 (0.009) | |
PDO_reduced | −0.02 | 0.01 | 0.030 (0.075) | −0.61 | 0.002 (0.067) | ||
TC frequency | Percentage contribution to PDI: 56.3% | Original | 3.8 | 5.2 | 1.40 (0.000) | −1.22 | 0.067 (0.000) |
PDO_reduced | −0.20 | 0.18 | 0.39 (0.212) | −0.57 | 0.034 (0.075) | ||
TC intensity | Percentage contribution to PDI: 14.1% | Original | 4.27 | 4.35 | 0.08 (0.498) | −0.23 | 0.009 (0.013) |
PDO_reduced | −0.05 | 0.05 | 0.10 (0.498) | −0.31 | 0.010 (0.103) | ||
TC duration | Percentage contribution to PDI: 29.6% | Original | 1.00 | 1.01 | 0.01 (0.829) | −0.08 | 0.000 (0.950) |
PDO_reduced | 0.00 | 0.00 | 0.004 (0.946) | −0.02 | 0.000 (0.824) | ||
TC damages | Original | 2.12 | 3.71 | 1.59 (0.048) | −0.67 | 0.090 (0.001) | |
WNP subtropical high zonal index | Original | −0.35 | 0.31 | 0.66 (0.001) | −1.03 | 0.030 (0.169) | |
East Asian subtropical jetstream index | Original | 24.7 | 23.4 | −1.35 (0.000) | −1.36 | −0.056 (0.047) | |
