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https://doi.org/10.1175/MWR-D-21-0205.1 

FIG. 22. The conceptual model of eyewall reorganization of Typhoon Fanapi in two perspective views: (a) from the southeast and (b) from the northwest. The black contour indicates the radar-echo isosurface of 20 dBZ, the thick gray arrow and “J” indicate the local maximum tangential wind of Typhoon Fanapi, the red and orange contours indicate the stretching in deep and moderate convection, the blue arrow indicates the tilting of the horizontal vorticity into the vertical direction, and the thin gray curved arrows indicate the vortical hot towers (VHTs)