Table 2 Linear trends in annual-mean latitude of tropical cyclones and seasonality components, in ERA-Interim TC dataset.

From: Poleward migration of western North Pacific tropical cyclones related to changes in cyclone seasonality

1979–2018

All-track-points

Genesis

LMI

Lysis

All-track-point transit distance (all-track-points–genesis)

Transit distance (lysis–genesis)

Developing phase transit distance (LMI–genesis)

Dissipating phase transit distance (lysis–LMI)

Total

88 ± 41*

49 ± 30*

59 ± 33*

125 ± 98*

41 ± 47**

76 ± 108

11 ± 48

65 ± 77**

\({\delta }_{{P}^{{\prime} }}\)

36 ± 23*

14 ± 14*

20 ± 17*

52 ± 36*

24 ± 16*

38 ± 28*

6 ± 6**

32 ± 24*

\({\delta }_{{\mathrm {Lat}}^{{\prime} }}\)

23 ± 39

25 ± 27**

26 ± 38

24 ± 112

−2 ± 44

−1 ± 119

1 ± 55

−2 ± 83

\({\delta }_{{P}^{{\prime} }{\mathrm {Lat}}^{{\prime} }}\)

30 ± 24*

9 ± 17

13 ± 22

49 ± 56**

19 ± 21**

39 ± 57

4 ± 26

35 ± 46

  1. Linear trends (km/decade) in annual-mean latitude and its three seasonality contributing terms (\({\delta }_{{P}^{{\prime} }}\), \({\delta }_{{\mathrm {Lat}}^{{\prime} }}\) and \({\delta }_{{P}^{{\prime} }{\mathrm {Lat}}^{{\prime} }}\)) for western North Pacific TC track metrics, in the ERA-Interim TC dataset, over the satellite era (1979–2018). The El Niño Southern Oscillation and Pacific Decadal Oscillation effects have been removed with a multivariate regression before estimating the trend; ± represents the 95% confidence interval of trend value. * indicates significant trend at the 95% confidence. ** indicates significant trend at the 90% confidence.
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