Figure 4
From: Observations of boundary layer wind and turbulence of a landfalling tropical cyclone

Cumulative sum of cospectrum (Ogive) curves of the two components of momentum fluxes verse the horizontal wavenumber at height (a) 320 m, (b) 160 m, (c) 40 m, and (d) 10 m. The record time is 2018-09-16 07:30.