Fig. 3: Vortex Rossby wave structures extracted from SAR-derived high spatial resolution wind field before TC intensification of Hurricane Vance (2014).
From: Potential tropical cyclone movement and intensification factors imaged by spaceborne SAR
a TC intensity from best track (BT), (b) storm-centered SAR-derived wind field within 150 km from RADARSAT-2 VH-polarized ScanSAR image acquired at 01:12 UTC on 2 November, (c) reconstructed symmetric mean flow of (b), (d) & (e) same as (b) & (c) but acquired at 13:11 UTC on 3 November, 2014, (f) Azimuth-radius plot of the residual wind speed obtained by removing Fig. 3c from Fig. 3b and azimuth-radius distribution of the residual wind speed with horizontal resolution of 1 km and azimuthal resolution of 2 degrees, (g) Radial wind profiles of SAR detection along the dash line in Fig. 3e and theoretical vortex Rossby wave model with RMW of 16.0 km and TC intensities of 23.3 m/s estimated by SHEW model, (h) FFT (fast Fourier transform) results of the theory simulation and SAR detection, and (i) spiral rain band features indicating VRWs (Vortex Rossby waves) shown by GOES (Provided/NOAA) taken at 16:00 UTC on Nov, 2, 2014 between the two SAR images.
