Fig. 3: Spatial distribution of the linear trend of annual rapid intensification (RI) counts.
From: Recent increases in tropical cyclone rapid intensification events in global offshore regions
RI is defined as an intensification of at least a 45 kt/24 h and b 30 kt/24 h. The 41-year linear trend is calculated for each 2° × 2° latitude–longitude grid, and the unit is count/decade. The black dots show areas where 95% confidence for the linear fit is satisfied. The blue lines encompass the regions within 400 km of the coast. Data smoothing using a three-point smoother was performed for better display clarity.
