Extended Data Fig. 5: Evolution of the drifter measured ocean current speeds within r < 7R_max under weak TCs.

from 1991 to 2020. The color shading and solid lines represent the current speeds at different distances from the corresponding TC centers along the cross-track direction, and the dashed lines are the associated current speed trends. The lower and upper limits of all the lines are 18 and 45 cm s⁻¹, respectively.