Extended Data Fig. 2: Time series of annual-mean tropical-cyclone translation speed and their linear trends in varying latitude belts.

a, b, Time series are shown for global latitude belts southward (poleward) of 30° S and northward (poleward) of 35° N (a), and in the belts 30°–0° S, 0°–15° N, 15°–25° N and 25–35° N (b). The broader latitude belts defined in the less-active Southern Hemisphere were needed to have a large enough sample of tropical cyclones in each to perform the analyses. The analyses shown here are fairly robust to the choice of latitude-belt bounds.