Table 2 P values from the Mann-Kendall test of near-surface current speeds measured by drifters (regular font) and for sea surface wind speeds inferred from these current speeds using the data-driven SSWS inversion model (in bold), within varying \({R}_{\max }\) of weak TCs between 1993 and 2022

From: Limited global intensification of weak tropical cyclones over the past 30 years

Basin

Rmax

1

2

3

4

5

6

7

NA

0.0497 (↓)

0.0688

0.5207

0.7753

0.9431

0.5925

0.8305

 

0.2844

0.1868

0.0224 (↑)

0.0060 (↑)

0.0102 (↑)

0.0185 (↑)

0.0420 (↑)

NEP

0.5865

0.2390

0.4325

0.4325

0.3724

0.3353

0.1989

 

0.5609

0.1435

0.0323 (↑)

0.0153 (↑)

0.0024 (↑)

0.0067 (↑)

0.0125 (↑)

NWP

0.5207

0.9431

0.8028

0.8028

0.6427

0.6427

0.6947

 

0.2251

0.0935

0.0246 (↑)

0.0224 (↑)

0.0353 (↑)

0.0269 (↑)

0.0744

NI

0.9671

0.4298

0.3334

0.0721

0.0343 (↓)

0.0060 (↓)

0.0037 (↓)

 

0.0189 (↑)

0.1759

0.9802

0.6238

0.5968

0.6495

0.5937

SI

0.5441

0.5925

0.3353

0.1640

0.3918

0.3177

0.4118

 

1.0000

0.4325

0.3724

0.8305

0.5441

0.2844

0.3008

SP

0.6277

0.1709

0.0586

0.2535

0.1868

0.1535

0.0935

 

0.5085

0.0032 (↑)

0.0067 (↑)

0.0060 (↑)

0.0038 (↑)

0.0043 (↑)

0.0092 (↑)

Global

0.6685

0.7481

0.6685

0.8584

0.8584

0.9715

0.9715

 

0.0804

0.0804

0.0153 (↑)

0.0027 (↑)

0.0031 (↑)

0.0048 (↑)

0.0060 (↑)

  1. ↓ and ↑ symbolize the downward and upward trends during 1993–2022, respectively. Sea-surface wind speeds inferred from current speeds using the data-driven SSWS inversion model are highlighted in bold.