Research Article

Synoptic-Scale Precursors to Tropical Cyclone Rapid Intensification in the Atlantic Basin

Figure 8

Vorticity at 500 hPa (s−1) cluster 3 RI composite (panel (a)) and non-RI composite (panel (b)) and the resulting differences in the permutation test of the fields (panel (c): shaded areas are significant at or less). Higher values of vorticity over storm center for RI systems with the value field revealing where differences are strongest and statistically significant over this region.
(a)
(b)
(c)